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Results 1501 to 1530 of 4099:

Sewage sludge enhances tomato growth and improves fruit-yield quality by restoring soil fertilityOriginal Paper

Ebrahem M. Eid, Kamal H. Shaltout, Saad A.M. Alamri, Sulaiman A. Alrumman, Ahmed A. Hussain, Nasser Sewelam, Gehad A. Ragab

Plant Soil Environ., 2021, 67(9):514-523 | DOI: 10.17221/205/2021-PSE

Among the various disposal strategies for sewage sludge (SS), soil application is the most suitable. This study was conducted to evaluate soil amendment with SS (0, 10, 20, 30 and 40 g/kg) and its impact on soil fertility and tomato (Solanum lycopersicum L.) growth. The SS significantly improved the agromorphological attributes, the number of produced fruits, and the fruit biomass of tomato plants. The 30 g/kg application of SS led to the highest growth rate and fruit yield. Considering the fruits, the best safe enrichment of metal nutrients was recorded at 30 g/kg, with a significant increase in the micronutrient metals Mn, Zn, Ni, Cu, and Fe with 624, 193, 125, 70, and 32%, respectively, compared to the control. The SS amendment enhanced soil fertility, and heavy metals were within the permissible ranges for agricultural soils. Bioaccumulation factors (BFs) indicated that SS application induced the accumulation of most of the studied metals in the roots, and the BF values of Zn, Cu, Ni, and Pb were > 1. The current study concluded that recirculating SS nutrient components to agricultural soils could offer a valid solution for the sustainable management of this organic waste and enhance plant-crop productivity.

Accumulation of heavy metal pollution caused by traffic in forest trees in the park of Kerey and Janibek Khans of the city of Nur-Sultan, KazakhstanOriginal Paper

Sezgin Ayan, Dani Sarsekova, Gani Kenesaryuly, Ergin Yilmaz, Orhan Gülseven, Ilknur Şahin

J. For. Sci., 2021, 67(7):357-366 | DOI: 10.17221/37/2021-JFS

Air quality in Nur-Sultan, the fast-growing new capital city of Kazakhstan, has been poorly investigated. This research was carried in Kerey and Janibek Khans Park in Nur-Sultan, the capital city of Kazakhstan, which is affected by "different traffic density" on the roads. Three different categories of contamination (i) high pollution (distance from the main road 10-15 m), (ii) moderate pollution (distance from the side road 15-30 m), and (iii) low pollution (distance from the source of contamination 30-80 m) at different levels resulting from urban transportation were examined. The aim of the study is to determine the pollution accumulation amounts of Ni, Cd, Pb, Cr, Li, Co, Fe, and Zn in five different tree species: Norway spruce (Picea abies /L./ H. Karst.), blue spruce (Picea pungens Engelm.), Scots pine (Pinus sylvestris L.,), Siberian larch (Larix sibirica Ledeb.), and silver birch (Betula pendula Roth). Significant differences in Ni, Cd, Pb, Cr, Li, Co, Fe, and Zn accumulation amounts were determined between three different parts of the park exposed to different levels of contamination. Approximately twice higher Ni, 2.3 times Cd, 3.3 times Pb, 2.7 times Co, 1.6 times Zn accumulation were determined in the area exposed to high pollution than in the parts of the park exposed to low pollution. Cd deposition in the area exposed to high contamination was higher in silver birch than in Scots pine and Norway spruce, while Cr and Co deposition values were higher in Norway spruce than in birch and Scots pine.

Estimation of the prevalence of respiratory diseases in pigs in north-eastern Poland: Survey of pulmonary lesions in pigs at a slaughterhouseOriginal Paper

P Przyborowska-Zhalniarovich, Y Zhalniarovich, K Wasowicz

Vet Med - Czech, 2021, 66(6):242-247 | DOI: 10.17221/188/2020-VETMED

A total of 29 520 animals, from 164 batches of pigs belonging to an identical number of herds, were involved in the study. The considered population of pigs were limited to the region of north-eastern Poland involving six voivodeships. From each herd, samples of blood were collected to evaluate the antibody titres to Mycoplasma hyopneumoniae, porcine reproductive and respiratory syndrome virus, Aujeszky's disease virus and swine influenza virus. At an abattoir, the lung lesions of each batch were scored and the enzootic pneumonia-like lesion average value was calculated. Lesions, indicative of enzootic pneumonia, were found in 57.8% of the lungs. For all lungs, the enzootic pneumonia-like lesion average value was 1.74, ranging from 0.42 to 3.56 among the 164 batches. In the examined pig population, 57.8% were considered suffering from swine respiratory disease, the majority of the affected pigs came from the Podlaskie (21.7%) and Greater Poland (17.25%) voivodeships. In the most affected voivodeships, 88.37% and 85.16% of the farms were considered as disease-susceptible for Greater Poland and Podlaskie, respectively. The findings indicate that, in pigs in north-eastern Poland, the major pathogens causing pneumonia-like lesions are Mycoplasma hyopneumoniae (68.9%) and porcine reproductive and respiratory syndrome virus (44%).

Insights into the development of electrokinetic remediation technology: A bibliometric analysisOriginal Paper

Fan Zheng, Hua Zhu, Haobo Hou

Soil & Water Res., 2021, 16(4):250-255 | DOI: 10.17221/63/2020-SWR

Electrokinetic remediation (EKR) is a powerful technique aimed at pollutant removal in soil, sludge, mine tailings, and so on. In the current work, we performed a bibliometric analysis of the research on EKR for the period of 1900-2018 on the basis of the core database of the Science Citation Index Expanded. In addition to a basic analysis of the research characteristics, keywords were analysed for four major participants: USA, China, Spain, and South Korea. The periods of 1990-2001, 2002-2008, and 2009-2018 were studied using the keyword analysis method to gain insights into the development of EKR and predict its future trends. The results revealed that the related research field in the USA was broad during the study periods. Meanwhile, China was interested in fluorine pollution and contamination in red soil. Spain paid close attention to pollution due to agricultural contamination. South Korea focused on radioactive element pollution. The number of papers published over a period of 28 years increased steadily and continued to rise after 2008. The combined techniques of EKR + phytoremediation and EKR + bioremediation were successively utilised by scholars over time, and the latter is expected to demonstrate vitality in the future.

Impact of cover crops in inter-rows of hop gardens on reducing soil loss due to water erosionOriginal Paper

David Kabelka, David Kincl, Jan Vopravil, Petr Vráblík

Plant Soil Environ., 2021, 67(4):230-235 | DOI: 10.17221/24/2021-PSE

Soil degradation caused by water erosion in sloping hop gardens is definitely a serious issue because the space in inter-rows is without plant residues for most of the year in traditional cultivation. Cover crops in inter-rows of hop gardens and their efficiency in soil conservation are assessed in this article. There is only little research available in this area, and our data bring unique information on water erosion in hop gardens. Technologies with different types of cover crops were always compared with the conventional cultivation. The research was conducted within the years 2016-2020. A field rainfall simulator was used to determine the soil conservation effectiveness of selected technologies. The simulated rainfall was performed in two stages of cover crops growth with the main aim to measure the overall soil loss. The outcomes from the measurements confirmed that cover crops in inter-rows of hop gardens protect the soil surface from falling raindrops and significantly (P-value < 0.05) reduce soil loss. It can be concluded that this technology had a soil conservation effect already one month after sowing, and it is a basis for sustainable agricultural management on sloping hop gardens.

Residual effect of superphosphate on the sulphur status of soil and plants in a long-term NPK fertilisation experiment on a Chernozem in HungaryOriginal Paper

Evelin Kármen Juhász, Rita Kremper, Áron Béni, Andrea Balláné Kovács

Plant Soil Environ., 2021, 67(11):625-632 | DOI: 10.17221/247/2021-PSE

Recently, plant-available sulphur (S) in the soil is decreasing due to the limited use of S containing fertilisers and the reduction of atmospheric S deposition. The aim of this work was to evaluate the S status in a long-term fertilisation experiment on a Chernozem in Hungary, with control and 2 NPK rate treatments, considering that after 27 years of superphosphate (SP) use, SP was replaced by monoammonium phosphate in 2010. Plant and soil sampling were performed in 2017 at three different development stages of winter wheat. To assess the S status, the S balance was estimated (for 34 years), KCl soluble soil sulphate, S as well as nitrogen (N) concentration and some amino acids in wheat grain were measured. N/S ratios, S and N uptake of wheat were calculated. The residual effect of SP could be measured only in terms of KCl soluble SO42--S in soil. According to the wheat grain S concentration (0.08-0.10%) and N/S ratio (14.9-22.0), wheat was S deficient, despite the positive S balance in the fertilised plots. In this experiment, where S fertiliser was applied with 84 kg S/ha dose in 1983-2010, followed by a 7-year period without S fertilisation, S supply is necessary for achieving adequate wheat quality.

A study on the influence of the loading rate and orientation on some mechanical properties of cassava tubers of different agesOriginal Paper

Olawale Ogunnigbo, Dare Adetan, Tunde Morakinyo, Olusola Olusunmade, Bolaji Ojerinde

Res. Agr. Eng., 2021, 67(1):34-44 | DOI: 10.17221/57/2020-RAE

The study determined the effects of the speed of loading and the loading orientation on some selected mechanical properties of the TME 419 cassava tuber variety at different ages of the tuber which are essential in the design and construction of the processing and handling equipment of a cassava peeler. The properties considered include the bioyield and rupture points, compressive and rupture strengths, toughness and firmness, and moduli of stiffness and toughness, which were carried out in the transverse and longitudinal loading direction using an Instron Universal Testing Machine (UTM). As the loading rate increased from 5.00 to10.00 mm.min-1 and the age of the tuber varies from 1.00 to 2.00 years, the bioyield and rupture points, compressive and rupture strengths, toughness, firmness, moduli of stiffness and toughness in the transverse and longitudinal direction varies from 1 619.61 to 3 636.19 N and 136.08 to 384.52 N, 0.48066 to 1.07913 N.mm-2 and 0.26604 to 0.75173 N.mm-2, 766 to 1055 N.mm-1 and 1 262 to 2 965 N.mm-1, 303.98 to 553.68 mm.min-1 and 28.08 to 53.71 mm.min-1 2.30 to 4.19 N.mm-2 and 5.376 to 8.94N.mm-2 respectively. Generally, the values of the properties examined are higher in the longitudinal loading orientation than in the transverse and for a year and half old tuber which will be useful in designing an efficient cassava peeling system.

Evaluation of genetic diversity of subdivided genealogical groups in Lithuanian Trakehner horse population using immunogenetic toolsOriginal Paper

Alma Račkauskaité, Ruta Šveistiené, Violeta Razmaité, Virginija Jatkauskiené

Czech J. Anim. Sci., 2021, 66(6):200-210 | DOI: 10.17221/118/2020-CJAS

The objective of this study was to evaluate the inter-breed genetic diversity of Lithuanian Trakehner horses. The current population in Lithuania numbers 1 039 Trakehner horses. The study included the immunogenetic data analysis of 316 blood samples. Pedigree was traced back to 7-11 generations. The horses were assigned to genealogical clusters originating from East Prussian Trakehner Stud, Thoroughbred and Arab sires. The first two clusters were subdivided into nine-horse groups according to the most important ancestors. The evaluation of genetic diversity was based on six blood groups and five protein polymorphism systems. The differences between genealogical groups were confirmed by principal component analysis and applied cluster analysis. According to the allelic frequency, the Trakehner population changed very slightly through a 30-year period, and only one rare (0.013) allele TfRR (frequent in other Trakehner populations), has been newly found. The analysis of genetic polymorphism systems based on a very low rate of alleles Qabc (0.093) and Ddkl (0.046), which are typical of other populations, indicated the exclusivity of the Trakehner population in Lithuania. The average expected heterozygosity by blood protein polymorphism and blood groups were 0.409 and 0.441, respectively. The genetic clustering diverged by observed heterozygosity of blood groups and by pedigree data in Pilger through Egoist, Bay Ronald through Dark Ronald and Dampfross through Hyperion subgroups. The determined distinctiveness of subdivided Trakehner horse groups suggests reconsidering the breeding strategies and conservation programme of Trakehner horses. Breeding and selection of subdivided sire lines could be among the appropriate solutions for the maintenance and extension of the genealogical structure.

Effects of gravel-sand mulch on the runoff, erosion, and nutrient losses in the Loess Plateau of north-western China under simulated rainfallOriginal Paper

Yang Qiu, Xinping Wang, Zhongkui Xie, Yajun Wang

Soil & Water Res., 2021, 16(1):22-28 | DOI: 10.17221/141/2019-SWR

Gravel mulching is a characteristic agricultural technique that has been used for hundreds of years in the north-western Loess Plateau of China. However, the effects of the gravel-sand mulch on the processes of the runoff, soil erosion, and nutrient losses are neither fully distinguished nor even known in many parts of the world. This study investigated how different gravel particle sizes in the mulch affected the runoff, erosion as well as the extent of the nutrient losses in the surface runoff. The laboratory experiments were conducted using a rainfall simulator with three gravel mulch treatments: (1) fine gravel mulch (FG); (2) medium gravel mulch (MG); (3) coarse gravel mulch (CG) and a control group, bare soil (BS). The results of these rainfall simulation experiments gave estimates on how the grain size influences the runoff and losses of the soil and its nutrients. Applying the gravel mulch significantly delayed the runoff's starting time when compared with the bare soil. Both the total runoff and soil loss increased with the grain size of the gravel mulch. Compared with the bare soil, the lowest surface runoff and soil loss was observed from the fine gravel treatment. These results clearly show that gravel mulch plays an important role in the runoff and sediment generation processes, and that it significantly reduces the surface runoff and soil loss. The losses of the total nitrogen (TN), total phosphorus (TP), and total organic carbon (TOC) from the bare soil were much higher than those under the gravel mulching. The fluctuations in these nutrient-loss processes were the most intense in the CG treatment, while the TC content, in initial runoff, was significantly higher in the FG than the other treatments. Our findings suggest gravel mulch is a useful water and soil conservation technique in the loess area of north-western China, and these results can inform one on the theoretical principles for properly utilising gravel-mulched fields.

Barriers to exit encountered by small farms in light of the theory of new institutional economicsOriginal Paper

Lukasz SATOLA, Tomasz WOJEWODZIC, Wojciech SROKA

Agric. Econ. - Czech, 2018, 64(6):277-290 | DOI: 10.17221/233/2016-AGRICECON

For at least 25 years, processes involving structural changes have been growing more and more intense in the countries of Central and Eastern Europe, with these processes including a decline in the number of small farms. The main aim of this paper is to present the mechanisms involved in, as well as barriers to and costs preventing the exit of farms from agriculture, including those that make it difficult to transfer production resources which are being released to other companies. This research takes the form of an overview and is based on the output of new institutional economics, and on transaction cost and rent-seeking theories in particular. The most frequent difficulties encountered in the process of exit from farming include low profitability of production and the shortage of capital among potential buyers, while the lack of sellers' financial resources and the necessity of incurring expenses related to preparing and finalising the sale of resources held by them (the actual transaction costs related to closing down farms) are frequently overlooked. The most important barriers preventing the complete liquidation of farms are the inherent transaction costs categorised as expenses, as well as the emotional costs and costs of alternatives, which are difficult to evaluate and estimate. The following notions are particularly helpful in explaining barriers to exit from farming: the concept of transaction costs and rent-seeking theory, which are both a part of the stream of thought of new institutional economics.

Infestation of Norway spruce seedlings by Cryphalus asperatus: New threat for planting of forests?Short Communication

Tomáš Fiala, Jaroslav Holuša

Plant Protect. Sci., 2021, 57(2):167-170 | DOI: 10.17221/112/2020-PPS

Cryphalus asperatus (Coleoptera: Curculionidae, Scolytinae) is described as an exceptional but important secondary pest of Norway spruce seedlings. Of the 10 000 seedlings transported to one location in the Ore Mountains, Central Europe in 2020, in total 1 500 seedlings were killed by C. asperatus. The infestation and death of seedlings probably resulted in part from the substantial local increase in the local abundance of C. asperatus after the sanitation felling of many Ips typographus-infested and otherwise damaged trees; the felled trees provided many branches suitable for C. asperatus feeding. In addition, the seedlings were probably stressed by the multi-hour transportation (probably drought) from the forest nursery.

Identification of lactic acid bacteria and yeasts from traditional sourdoughs and sourdough production by enrichmentOriginal Paper

Ayşe Sevgili, Osman Erkmen, Sinem Koçaslan

Czech J. Food Sci., 2021, 39(4):312-318 | DOI: 10.17221/56/2021-CJFS

The subject of this study was to investigate lactic acid bacteria (LAB) and yeasts microbiota of traditional sourdough (n = 36) and to indicate characteristics of enriched sourdough that is produced from combinations of isolates. A total of 60 LAB and 40 yeasts were identified from sourdough by matrix-assisted laser desorption ionisation-time-of-flight mass spectrometry (MALDI-TOF MS) analysis. The dominant LAB microflora was Lactobacillus brevis (43.33%), Pediococcus acidilactici (21.67%) and Lactobacillus plantarum (18.33%). The dominant yeasts microflora was Saccharomyces cerevisiae (27.5%), Pichia kudriavzevii (25.0%) and Kluyveromyces marxianus (12.5%). The sourdough prepared with the combination of L. brevis, Leuconostoc mesenteroides, P. acidilactici and S. cerevisiae, K. marxianus showed the best physicochemical and microbiological properties while that with L. plantarum, L. brevis and P. kudriavzevii, Wickerhamomyces anumalus was the poorest. LAB and yeasts in the sourdoughs were ranged from 6.58 log CFU g-1 to 9.12 log CFU g-1 and from 6.12 log CFU g-1 to 7.88 log CFU g-1, respectively. Various chemical parameters such as pH, total titratable acidity (TTA), ethanol, and sourdough volume were differ depending on the type of microbial species. TTA was more pronounced in the sourdoughs produced with homofermentative LAB. Yeasts and LAB were dominated during continuous enriching of sourdough, supporting an important role during fermentation.

External fixator for the treatment of narrowed pelvic canal in a catCase Report

S Pinna, C Tassani, M Rossini, F Lanzi

Vet Med - Czech, 2021, 66(8):356-362 | DOI: 10.17221/173/2020-VETMED

The aim of this study was to report the outcome of the use of an external fixator to treat a pelvic canal stenosis in a 5-month-old female cat. The cat was referred with a history of 3 weeks of intermittent signs of constipation refractory to the medical management, occurring after surgical treatment for a bilateral sacroiliac luxation and sacral fracture. The clinical examination revealed instability of the pelvis and a radiograph showed a pelvic canal stenosis and megacolon. External fixator was the method of choice to be used in this case. The manually applied tension on an external fixator resulted in a widening of the pelvic canal. At 45 days after surgery, there were no signs of constipation, and the radiological examination showed progressive bone healing. At 18 months post-op, the cat had no abnormalities both on the clinical examination and on the radiography. In conclusion, the use of an external fixator led to the widening of the pelvic canal using a minimally invasive procedure. To the authors' knowledge, this case report represents the first surgical description and clinical outcome of the widening of the pelvic canal in cats using an external skeletal fixator.

Selenium effect on wheat grain yield and quality applied in different growth stagesOriginal Paper

Ladislav Ducsay, Alexandra Zapletalová, Marek Slepčan, Mária Vicianová, Peter Hozlár, Rastislav Bušo

Plant Soil Environ., 2021, 67(3):147-153 | DOI: 10.17221/589/2020-PSE

Small field plot experiments were carried out at the testing station of the Central Control and Testing Institute in Agriculture in Veľký Meder (Slovakia) in the experimental years 2014/2015, 2015/2016 and 2016/2017. Selenium salts in the form of sodium selenite and sodium selenate were applied in growth phases: end of tillering (BBCH 29) and flag leaf ligule and collar visible (BBCH 39). The effect of experimental years 2014/2015, 2015/2016 and 2016/2017 on the yield of wheat grain was not statistically significant within the observed variants. The achieved mean yields were in the range from 10.06 ± 0.81 to 11.07 ± 0.29 t/ha in 2014/2015, from 9.82 ± 0.54 to 10.32 ± 0.10 t/hain 2015/2016 and from 11.23 ± 0.76 to 11.64 ± 0.51 t/ha in 2016/2017. Selenate in comparison with selenite influenced the selenium accumulation in wheat grains more positively. However, a significant difference was recorded in variants with selenite application in the flag leaf growth phase in comparison with the end of tillering phase. The influence on the content of macroelements P, K, Ca and microelements Cu and Fe was observed in sodium selenite only; its application decreased the element content in comparison with the control variant. Statistically significantly higher values of fiber and fat were achieved after application of selenium in the flag leaf growth stage in comparison with the end of tillering.

Phytoaccumulation of heavy metals in native plants growing on soils in the Spreča river valley, Bosnia and HerzegovinaOriginal Paper

Senad Murtić, Ćerima Zahirović, Hamdija Čivić, Emina Sijahović, Josip Jurković, Jasna Avdić, Emir Šahinović, Adnana Podrug

Plant Soil Environ., 2021, 67(9):533-540 | DOI: 10.17221/253/2021-PSE

This study evaluated the phytoremediation potential of eight native plant species on heavy metal polluted soils along the Spreča river valley (the northeast region of Bosnia and Herzegovina). Plants selected for screening were: ryegrass (Lolium perenne L.), common nettle (Urtica dioica L.), mugwort (Artemisia vulgaris L.), wild mint (Mentha arvensis L.), white clover (Trifolium repens L.), alfalfa (Medicago sativa L.), dwarf nettle (Urtica urens L.) and yarrow (Achillea millefolium L.). All aboveground parts of selected native plants and their associated soil samples were collected and analysed for total concentration of Ni, Cr, Cd, Pb, Zn and Cu. The bioaccumulation factor for each element was also calculated. The levels of Cr (90.9-171.1 mg/kg) and Ni (80.1-390.5 mg/kg) in the studied soil plots were generally higher than limits prescribed by European standards, indicating that the soils in the Spreča river valley are polluted by Cr and Ni. Among the eight screened plant species, no hyperaccumulators for toxic heavy metals Ni, Cr, Cd and Pb were identified. However, the concentrations of toxic heavy metals in the above-ground parts of Artemisia vulgaris L. and Trifolium repens L. were significantly higher than in the other studied plants, indicating that both plant species are useful for heavy metal removal.

Growth performance, mortality and body and carcass characteristics of rabbit fatteners related to crossbreeding of Mecklenburger Schecke sires with dam line of HYLA rabbitsOriginal Paper

David Zapletal, Petra Jakešová, Eliška Žáková, Vlastimil Šimek, Eva Straková

Czech J. Anim. Sci., 2020, 65(9):337-345 | DOI: 10.17221/192/2020-CJAS

The aim of the study was to evaluate the effect of crossing Mecklenburger Schecke (MS) males with the maternal commercial line of HYLA rabbits on the growth performance, mortality and body and carcass components of fattened rabbits under intensive farming conditions. The control (C) group consisted of albino crossbred rabbits of the HYLA combination AB sires × CD dams. The tested (T) group (MS sires × HYLA CD dams) consisted of rabbit crosses between the MS sires and the same dam line as in the C group. Rabbits of both groups were raised and fattened under identical nutritional and management conditions. The crossing of MS males with the maternal line of HYLA rabbits led to the acceptable growth performance of rabbits in the T group. The higher slaughter weight of rabbits in the T group as compared to rabbits in the C group (P < 0.01) as associated with the higher weight of hot carcass and higher proportions of fore and intermediate parts of carcass (P < 0.01). On the contrary, HYLA rabbits had a higher proportion of the hind part of carcass (P < 0.001); yields of hind leg meat and musculus longissimus thoracis et lumborum were not influenced by the genotype. However, since higher mortality was found in rabbits of the T group during fattening, it is not possible to recommend the MS breed as a common sire line used under conditions of intensive farming at this moment. Regarding the rabbit sex, slaughtered females showed a higher proportion of liver and a lower dressing percentage associated with the worse carcass compactness compared to males.

The mycological study of conifers in Tbilisi and its surroundingsOriginal Paper

Irina Danelia, Nino Zaqariashvili, Lia Amiranashvili, Gulnara Badridze, Salome Kvitsiani

J. For. Sci., 2021, 67(10):464-476 | DOI: 10.17221/79/2021-JFS

Extensive microbiological research was carried out in Tbilisi (capital of Georgia) and its surroundings to determine the causes of massive disease and dieback of urban coniferous plantations. The biological material was picked up in June-July 2020 from trees with various degrees of the disease in 42 different localities. 247 conifers (15 species) were examined microbiologically. 1 169 samples of microscopic fungi were isolated. Based on cultural-morphological and molecular-genetic (PCR) studies, 34 strains were identified to the species level, 17 to the genus level, and 1 strain to the family level. Ascomycota were represented by 15 families and 33 species, Basidiomycota by 1 family and 2 species and Zygomycota by 2 families and 2 species. Among the isolated strains, 9 species were clearly dominant and found in all studied coniferous species: Alternaria alternata (Fr.) Keissl, Sphaeropsis sapinea (Fr.) Dyko & B. Button, Epicoccum nigrum Link., Sordaria lappae Potebnia, Curvularia spp., Dothiorella spp, Nothophoma quercina (Sydow & P. Sydow) Q. Chen & L. Cai, Phoma odoratissimi Q. Chen, Didymella aliena (Fries) Q. Chen & L. Cai. It may be supposed that massive activation of pathogenic fungi is the result of weakening of plant immunity on the background of increasing abiotic stresses in Tbilisi over the years; which led to an imbalance between latent pathogens and host plants and eventually to the depressing consequences of trees dieback.

Production of low protein and gluten-free cookies for phenylketonuria (PKU) and/or celiac patientsOriginal Paper

Ozen Parlak, Ayse Neslihan Dundar

Czech J. Food Sci., 2021, 39(1):29-34 | DOI: 10.17221/145/2020-CJFS

Abstract: The aim of this study was to analyse the production of gluten-free, low protein cookies, which can easily be consumed by celiac and phenylketonuria (PKU) patients. The formula was adopted to prepare the control cookies (without dried fruits) from maise starch, stabilisers, salt, sodium bicarbonate, protein-reduced milk powder, and sunflower oil. Different cookies were made by adding raisins (R), dried black currants (Cu), dried dates (D), dried apples and cinnamon (A) separately. In cookies, two different stabilisers were calculated according to starch weight [pectin (P): 0.15%, glycerol monostearate (GMS, G): 0.4%]. The effects of stabilisers and dried fruits on the physicochemical and sensory properties of cookies were investigated. The protein content was significantly higher (P < 0.05) in the cookies including R with pectin (PR), Cu with pectin (PCu), and A with pectin (PA). The amount of phenylalanine (Phe) was significantly higher (P < 0.05) in PR. The values of dietary fibre were the highest in the A cookies, while the lowest values appeared in the control (C). In the sensory evaluation (appearance, tasting properties, and affordability), it was found that PD (pectin with dries dates) was chosen as the best cookie (P < 0.05).

Soil physical properties and crop status under cattle manure and Z'Fix in Haplic ChernozemOriginal Paper

Václav Novák, Petr Šařec, Kateřina Křížová, Petr Novák, Oldřich Látal

Plant Soil Environ., 2021, 67(7):390-398 | DOI: 10.17221/159/2021-PSE

A three-year experiment was conducted to investigate the effect of Z'Fix on soil physical properties and crop status. Z'Fix is an agent recommended as an addition to animal bedding to prolong its function and to lower ammonia emissions in stables. Concurrently, a positive effect on organic matter transformation in resulting manure is claimed. The experiment involved control, farmyard manure (FYM), and farmyard manure with Z'Fix (FYM_ZF) as variants. In-field sampling was conducted for cone index, water infiltration and implement a unit draft, where the latter two showed significant differences in favour of FYM_ZF. Also, concerning crop yields, FYM_ZF consistently attained the highest values, followed by FYM throughout all three seasons. Furthermore, remotely sensed data were analysed to describe crop status via normalised difference vegetation index where significant differences were found across all variants. Based on the study, FYM_ZF demonstrated positive effects both on soil properties and crop conditions.

Comparison of starch digestibility methods for extruded wheat grains (Triticum aestivum L.)Original Paper

Dana Homolková, Vladimír Plachý, Anna Maňourová, Michal Kaválek, Václav Dvořáček, Boris Hučko, Milan Marounek, Ivo Doskočil

Czech J. Anim. Sci., 2021, 66(10):420-427 | DOI: 10.17221/56/2021-CJAS

This study compared different methods of determining starch digestibility (in vivo vs in vitro) in wheat grains and evaluated the influence of extrusion on digestibility. In vivo starch digestibility was determined in broiler chickens by calculating the residual starch content in their ilea and the digestibility using a chromium oxide indicator. In vitro digestibility was examined using pepsin and pancreatin. During in vivo testing, the highest digestibility coefficient (DC) was achieved by the Bonanza variety in its extruded form (91.19 ± 0.40%). In contrast, the lowest DC was achieved by the Tobak variety in its non-extruded form (81.45 ± 1.92%). Generally, a higher DC was observed in vivo for extruded forms of wheat. During in vitro testing, the highest DC was achieved by the Stefii variety in its non-extruded form (96.10 ± 0.55%), whereas the lowest DC was observed in the Yetti variety in its extruded form (49.72 ± 0.41%). Overall, the in vitro experiments did not exhibit significant differences between extruded and non-extruded forms of wheat. Linear regression analysis showed a strong relationship (r2 = 0.860; 85.98%) between in vivo- and in vitro-derived DC values in all wheat varieties, both in extruded and non-extruded forms. The study showed that in vivo testing is a suitable method for the determination and control of starch levels in extruded materials. However, despite the accuracy of this technique, it is also very demanding in terms of time, space, equipment, and methodological knowledge. Therefore, based on the strong correlation between the in vivo and in vitro assays, we recommend in vitro digestibility testing as a preferable alternative.

Benefits of the LEADER method for Local Agenda 21 - Case study from their application in the Czech RepublicCase Study

Jana Kostalova, Jan Vavra

Agric. Econ. - Czech, 2021, 67(6):246-254 | DOI: 10.17221/407/2020-AGRICECON

The basic characteristic and comparison of the community-led local development tools: Local Agenda 21, used in public administration generally, and of the LEADER method, used within Local Action Groups (LAGs), is presented in this paper. It analyses their application in the Czech Republic. It discusses the potential synergistic effects of the application of these tools in two rural locations - the areas of two towns (Chrudim and Litomerice), which are leaders in the application of Local Agenda 21 in the Czech Republic. Both towns are members of LAGs - LAG Chrudimsko and LAG Ceske Stredohori. This combination of Local Agenda 21 and LEADER method are mutually supportive. The conclusion discusses recommendations for the improvement of community-led development.

Comparison of soil organic matter composition under different land uses by DRIFT spectroscopyOriginal Paper

Saven Thai, Lenka Pavlů, Václav Tejnecký, Petra Vokurková, Shahin Nozari, Luboš Borůvka

Plant Soil Environ., 2021, 67(5):255-263 | DOI: 10.17221/11/2021-PSE

The study aimed to estimate and characterise soil organic matter under different land uses (cropland, grassland, and forest) and soil depths. The soil organic matter composition of the soil was assessed by diffuse reflectance infrared spectroscopy (DRIFT). Humic and fulvic acids (HAs, FAs) were extracted from soils and their compositions were evaluated by DRIFT. Low molecular mass organic acids content was also measured. Our result revealed that the largest differences of the spectra in the composition of organic matter were observed in the upper parts of the soil profile. The forest soil spectra had more intense aliphatic bands, carboxylic, and CH bands than spectra of grassland and cropland soils. The difference of HAs spectra was at 3 010 to 2 800/cm where the most intensive aliphatic bands were in forest soil HAs, followed by grassland and cropland soil HAs. The grassland topsoil FAs spectrum differs most from the other land uses. It has lower peaks around 1 660-1 600/cm and 1 200/cm than cropland and forest. The concentration of low molecular mass organic acid (LMMOA) was the highest in the forest soil and the most abundant acid was citrate.

Crop sequence effects on energy efficiency and land demand in a long-term fertilisation trialOriginal Paper

Gerhard Moitzi, Reinhard W. Neugschwandtner, Hans-Peter Kaul, Helmut Wagentristl

Plant Soil Environ., 2021, 67(12):739-746 | DOI: 10.17221/440/2021-PSE

The effect of crop sequences (CR - continuous winter rye; CropR - three-field crop rotation of winter rye-spring barley-bare fallow) and fertilisation systems (unfertilised control, mineral fertiliser (NPK), farmyard manure (FYM)) on crop yield, energy efficiency indicators and land demand were analysed in a long-term experiment under Pannonian climate conditions. Due to lower fuel consumption in the bare fallow, the total fuel consumption for CropR was 27% lower than in CR. It was for NPK and FYM fertilisation by 29% and 42% higher than in the control. Although the energy output was lower in CropR than CR, the energy use efficiency for grain production increased by 35% and for above-ground biomass production by 20%. Overall crop sequences, the NPK treatment had higher crop yields, energy outputs and net-energy output with a lower energy use efficiency than the unfertilised control. CropR increased the land demand just by 20% in comparison to CR, although one-third of the land was not used for crop production. The land demand could be decreased with fertilisation by 50% (NPK) or 48% (FYM). A bare fallow year in the crop rotation decreased the crop yield, energy input and increased the energy use efficiency and land demand.

Sustainable alternatives to chemicals for weed control in the orchard - a ReviewReview

Md Jebu Mia, Francesca Massetani, Giorgio Murri, Davide Neri

Hort. Sci. (Prague), 2020, 47(1):1-12 | DOI: 10.17221/29/2019-HORTSCI

This review is designed to address various alternative weed-control practices and their possibilities in the fruit orchard in terms of sustainability. Correct weed management and maintenance of adequate orchard biodiversity are crucial for sustainable orchard soil management. The key is to practice an alternative weed-management approach (single or integrated) rather than to use possibly harmful chemicals only. Integration of modern equipment with a shallow tillage system can provide effective weed control in tree rows, including optimised tree performance and soil biodiversity. Living mulch suppresses weeds and enhances orchard biodiversity, while selection of less competitive and less pest-attracting species is crucial. Plastic covers offer long-term weed control, but additional nutrient amendments are required to maintain the balanced fertility of the soil. Wood chip mulch is suggested where the materials are available on or near the farm, and where there is lower incidence of perennial weeds. High pressure water and robotic systems are still in their infancy for fruit orchards, and required more research to confirm their efficiency.

Variations of soil physicochemical properties and vegetation cover under different altitudinal gradient, western Hyrcanean forest, north of IranOriginal Paper

Hassan Pourbabaei, Ali Salehi, Sepide Sadat Ebrahimi, Fazel Khodaparasrt

J. For. Sci., 2020, 66(4):159-169 | DOI: 10.17221/136/2019-JFS

This study was done to quantify the amount of soil organic matter and to evaluate physicochemical properties and vegetation cover changes along the altitudinal gradient. Nine altitudinal transects were selected from 100 m a.s.l. to 1 700 m a.s.l. Then, 160 circular plots of 1 000 m2 area with a distance of 150 m from each other were studied. Soil texture, bulk density, particle density, soil base saturation, phosphorus and potassium values did not indicate any specific variation pattern. Whereas pH decreased powerfully, the highest and the lowest value of pH was measured at 100 m a.s.l. and 1 700 m a.s.l., respectively. Soil organic carbon content increased significantly with increasing altitude (P ≤ 0.01). Density of trees decreased dramatically from 100 to 900 m a.s.l., whereas this trend was ascending from 1 100 to 1 700 m a.s.l. Density of shrub species increased with increasing altitude along the gradient and the highest value was revealed at 1 300 m a.s.l. The highest percentage of herbaceous species cover was found at a lower altitude and a decreasing trend was found along the altitudinal gradient.

A Bayesian analysis of hop price fluctuationsOriginal Paper

Douglas MacKinnon, Martin Pavlovič

Agric. Econ. - Czech, 2020, 66(12):519-526 | DOI: 10.17221/239/2020-AGRICECON

This paper quantifies the correlation between U.S. season average prices for hops with U.S. hop stocks and U.S. hop hectarage. The Hop Equilibrium Ratio, a measure of the supply/demand relationship for U.S. hops, was introduced. Through the Bayesian inference method, the authors used these data to calculate the effect an incremental change to one metric had on the probability of directional changes of future U.S. season average prices (SAP). Between 2010 and 2020, the dominance of proprietary varieties created unprecedented cartel-like powers offering opportunities for supply- and price-management. Research results will enable more accurate forecasting and greater price stability in the hop industry.

Epidemiology studies of Pseudomonas syringae pathovars associated with bacterial canker on the sweet cherry in SerbiaOriginal Paper

Renata Iličić, Jelica Balaž, Vladislav Ognjanov, Tatjana Popović

Plant Protect. Sci., 2021, 57(3):196-205 | DOI: 10.17221/140/2020-PPS

This study was conducted to examine the epidemiological characteristics of two Pseudomonas syringae pvs. - syringae (Pss) and morsprunorum race 1 (Psm) on the sweet cherry in both field and laboratory conditions. Cycled inoculations of one-year-old branches indicated that the sweet cherry became sensitive to Psm race 1 earlier in the season (October) compared to Pss (November). The most severe infections occurred in the dormancy period (November), while the necroses formed in January and March were less in their length. Inoculations of the two-/three-year-old branches performed in November resulted in necrosis, with those induced by Pss being more aggressive. The January inoculations, however, resulted in less formed necroses in length. Laboratory tests performed on excised sweet cherry branches confirmed the results yielded by the field experiments, indicating that the dormancy period poses the greatest risk for the P. syringae pvs. infection. The isolation of Pss and Psm bacteria from naturally infected sweet cherry samples (cankers) during the summer indicated that the bacteria that persists in cankers in low numbers became active during autumn. Significant Pss and Psm race 1 epiphytic bacterial populations were noted during the spring, but decreased in the summer and increased again in the autumn, indicating the presence of inoculum reservoirs. The greater understanding of the control strategies aimed at the epidemiological factors should, thus, facilitate better disease outbreak management.

Factors influencing consumer behaviour in the beer market in the Czech RepublicOriginal Paper

Veronika Svatošová, Petra Kosová, Zuzana Svobodová

Czech J. Food Sci., 2021, 39(4):319-328 | DOI: 10.17221/153/2020-CJFS

The aim of the paper is to identify the factors influencing consumers when beer consumption and when choosing restaurants for beer consumption in the Czech Republic (CR). A partial goal was to compare preferences and factors influencing beer consumers from the Vysočina Region and the South-Moravian Region. The survey included a questionnaire survey, which 408 respondents took part in. The results showed that the most influential factors in the selection of beer for consumers are taste, a high-quality brand, and Czech production. Surprisingly, price was not found to be an influential factor in beer selection but is rather neutral. Factors that influence consumers most when choosing a restaurant for beer consumption were also identified. Consumers are most influenced by the quality of the beer on offer and the environment in which it is consumed.

Stress burden for dogs in a simple soundproof cage: Heart rate variability and behavioural analysesOriginal Paper

A Uemura, L Hamabe, R Tanaka

Vet Med - Czech, 2021, 66(9):376-384 | DOI: 10.17221/238/2020-VETMED

Dog barking, which reaches around 100 dB, often becomes a noise issue in urban environments. One potential solution, a simple soundproof cage, has recently been marketed. To our knowledge, no study has been conducted to investigate what sort of stress burden is imposed on dogs kept in cages, and it may raise animal welfare concerns. The purpose of this study was, therefore, to reveal whether staying in a soundproof cage caused stress for the dogs or not. Ten healthy domestic dogs (5 males, 5 females) of small body size were evaluated. The heart rate variability (HRV), behaviour, and internal and external temperature during confinement in a soundproof cage for each dog were analysed. The HRV analyses revealed no significant differences for any variables between confinement and non-confinement (HR, P > 0.999 9; rMSSD, P = 0.359 4; SDNN, P = 0.359 4; LF, P = 0.652 3; HF, P = 0.128 9; LF/HF, P = 0.222 7). Overall, in our behavioural analysis, there were no significant differences between confinement and non-confinement (P = 0.105 5). In conclusion, the HRV and behavioural analyses did not indicate an increased stress burden on the dogs during confinement in the soundproof cage compared with non-confinement. The inner temperature of the cage was not elevated either. Nevertheless, the stress imposed on dogs caused by a soundproof cage should always be considered on an individual basis, and the time spent in such a cage should always be kept to a minimum.

Influence of baking on anthocyanin content in coloured-grain wheat breadOriginal Paper

Marie Eliášová, Zora Kotíková, Jaromír Lachman, Matyáš Orsák, Petr Martinek

Plant Soil Environ., 2020, 66(8):381-386 | DOI: 10.17221/210/2020-PSE

Composition and degradation of anthocyanins in blue and purple grain wheat during bread production were investigated using the HPLC-MS/MS method. The most abundant anthocyanins were delphinidin-3-rutinoside (blue grain wheat), cyanidin-3-glucoside and peonidin-3-glucoside (purple grain wheat). Peonidin-3-glucoside was also the most stable during grain treatment while delphinidin-3-glucoside had the greatest loss. Both blue and purple grain anthocyanins decreased significantly during bread production to 41.81% and 70.10% after baking, respectively, and to 24.21% and 60.00% after short-term storage, respectively. The blue grain wheat anthocyanins were lost mostly during baking, but in the purple grain wheat, the greatest decrease occurred during dough production. Despite the higher degradation, the blue grain wheat still showed higher anthocyanins content.

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