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Influence of different essential oils on refrigerated fish patties produced from bonito fish (Sarda sarda Bloch, 1793)Food Analysis, Food Quality and NutritionHusnu Sahan GURAN, Gulsum OKSUZTEPE, Ozlem Emir COBAN, Gokhan Kursad INCILICzech J. Food Sci., 2015, 33(1):37-44 | DOI: 10.17221/188/2014-CJFS The effects of different concentrations of thyme (group T), clove (group Cl), and rosemary (group R) extracts on the microbiological, chemical, and sensory attributes of fish patty made from the bonito fish (Sarda sarda Bloch, 1793) were investigated. The numbers of total mesophilic aerobic bacteria, coliform bacteria, Staphylococcus-Micrococcus spp. and yeasts and moulds in group R were lower than those of the other groups during storage (P < 0.05). During the storage period, total volatile basic nitrogen (TVB-N), thiobarbituric acid index (TBA-i), peroxide values, and free fatty acid content gradually increased in all groups, and significant differences were found between the groups (P < 0.05). The results of sensory evaluation showed that the shelf life of fish patties was 4 days for the control group, and 8, 10, and 14 days for the groups treated with thyme, clove and rosemary essential oil, respectively (P < 0.05). In conclusion, the addition of essential oils showed a positive effect on the product shelf-life; and in particular, rosemary essential oil produced a remarkable effect. |
Communities of oribatid mites and heavy metal accumulation in oribatid species in agricultural soils in Egypt impacted by waste waterHamdy Mahmoud EL-SHARABASY, Ahmed IBRAHIMPlant Protect. Sci., 2010, 46(4):159-170 | DOI: 10.17221/31/2010-PPS The continued use of waste water for irrigation of agricultural fields in Egypt may lead to accumulation of heavy metals in soils and adverse effects on soil-living communities. We investigated responses of oribatid communities to heavy metal contamination in mango plantations irrigated by the Ismailia canal in the Suez region. Mean concentrations of heavy metals determined in irrigation water were considerably above the recommended levels. Concentrations of metals in agricultural soil were however below the permissible levels. A comparison with concentrations of a typical uncontaminated soil in this area revealed that the Ismailia water canal used for irrigation of agricultural land has elevated levels of heavy metals. The results of our ecological survey showed that the abundance and structure of the soil oribatid communities were not influenced by levels of heavy metals in the soil. We also showed that the diversity index can be a valuable tool for assessing the possible impact of pollutants on different species of oribatid mites. The oribatid species appeared to be accumulating different amounts of heavy metals when characterised by their bioconcentration factors. Most species were poor zinc accumulators. The accumulation of heavy metals in the body of oribatids was not strictly determined by their body size or by the trophic level. In conclusion, our study showed that mango plantations impacted by waste water from the Ismailia canal are accumulating heavy metals in their soils above the background concentrations, but ecological effects on soil-living communities are not apparent yet. |
Soil characteristics and crop yields under different tillage techniquesOriginal PaperG. Mühlbachová, H. Kusá, P. RůžekPlant Soil Environ., 2015, 61(12):566-572 | DOI: 10.17221/567/2015-PSE The field experiment with different soil tillage treatments has been carried out in Prague-Ruzyně locality (Czech Republic) since 1995. Data of two growing cycles in the years 2007-2010 and 2011-2014 were evaluated. Tillage technique was decisive for changes in soil characteristics and crop yields. Bulk density, organic carbon (Corg) and microbial biomass C (Cmic) were more equilibrated throughout all tested soil layers (0-0.1; 0.1-0.2 and 0.2-0.3 m) in conventional tillage (CT). In reduced tillage (RT) and no-tillage (NT) treatments significant accumulation of Corg and increase of Cmic in the surface layer were found, compared to CT. No significant differences in Corg and Cmic between two growing cycles were determined; however, mostly higher values were obtained in the top layer of NT during the second growing period. Higher bulk density under conservation tillage techniques did not negatively affect soil characteristics and should be taken in consideration for data evaluation as it can alter interpretation of their changes in the soil profile. Crop yields were comparable in CT and RT. Yield decrease in NT was mostly observed for winter wheat and pea. Beneficial effects of RT and NT conserving soil moisture on crop yield were not observed in dry years. |
Management of maize stand height using growth regulatorsOriginal PaperTomáš SPITZER, Petr MÍŠA, Jan BÍLOVSKÝ, Jan KAZDAPlant Protect. Sci., 2015, 51(4):223-230 | DOI: 10.17221/105/2014-PPS Effect in reducing maize plant height using growth regulators ethephon, chlormequat chloride (CCC), CCC + ethephon, and mepiquat chloride + prohexadione-Ca was studied in field experiments during 2010 and 2011. It was found that maize plant height could be reduced by as much as 125 cm (49% of control) using a double application of ethephon (576 g a.i./ha) at growth stages BBCH 18-19 and BBCH 34-36. The other growth regulators displayed weak or no influence. An optimum level of shortening was achieved using ethephon (576 g a.i./ha) at BBCH 34-36 (reducing plant height by 40-90 cm), but it is necessary to count upon yield loss of 0.5-0.6 t/ha. |
Methodology of compositional assessment in the beech vegetation zone and its applicationOriginal PaperZamrzlová I., Doleželová D., Vacek O.Hort. Sci. (Prague), 2015, 42(3):159-166 | DOI: 10.17221/320/2014-HORTSCI The visual impact of primary landscape is overwritten, historical references and spiritual ties to the current local population are losing. Rational planning and evaluation of the landscape must correspond to this situation. In the Czech Republic methodologies of landscape assessment (for its identification, typology) exist, but there is no finalizing material to specify procedures for creating landscape designs in accordance with a particular landscape type or vegetation zone. As a response, the new methodology of compositional preconditions assessment in the beech vegetation zone and the model etalon applying generally valid compositional principles on landscape designs were created. In a verification study the new methodology was applied in a specific micro region association - the Svidník. For the worst evaluated units proposals according to the model etalon has been prepared to highlight the characteristics of the appropriate vegetation zone. |
Rural tourism development and financing in Romania: A supply-side analysisOriginal PaperDaniel BADULESCU, Adriana GIURGIU, Nicolae ISTUDOR, Alina BADULESCUAgric. Econ. - Czech, 2015, 61(2):72-82 | DOI: 10.17221/94/2014-AGRICECON For more than a century, and almost everywhere in the world, rural areas suffered a steady decline, due to the decrease of the real income from the agricultural activities, the lack of serious economic alternatives, and demographic issues. Rural tourism could contribute to the rural sustainable development through small local businesses valorising the natural, cultural and ethnographic resources. However, most of them need the financial support from private creditors (banks). The survey-based research conducted among banks' representatives has identified several strengths of small rural ventures, such as the small scale and the associated risks, the endurance to external shocks, the openness to market opportunities, as well as some of their weaknesses: e.g. a poor management experience, seasonality etc. We have also identified the actions necessary to be performed by these firms to attract financial resources from the banks' side, i.e. the diversification of income sources, the association and the adherence to recognized brands and maintaining a reasonable leverage ratio. It was found that the bank's size does not matter, but the nature of the bank's capital does: the private domestic banks are more willing to finance such businesses. The banks' involvement in co-financing the EU projects could be a way to foster and strengthen the rural businesses. |
Evaluation of platelet function in horses undergoing colic surgery using the PFA-100 platelet function analyserOriginal PaperA. Iwaszko-Simonik, S. GraczykVet Med - Czech, 2015, 60(9):476-482 | DOI: 10.17221/8438-VETMED Acute colic in horses, especially presentations requiring surgical correction, such as large colon volvulus, very often involves defective or excess platelet activation. The PFA-100 is a new point-of-care analyser that evaluates platelet function by measuring closure time (CT) in the whole blood of healthy horses in a standardised manner. However, there are no reports on platelet function in horses with colic measured by the PFA-100. The aim of the present study was to investigate platelet function in a group of horses suffering ascending colon displacement (ACD) and who underwent surgery compared to a group of control (C) horses. Thirty ACD cases and twenty untreated clinically healthy control horses were included. Blood samples were collected from the ACD horses prior to and 24, 48 and 72 h after laparotomy. Red blood cell count (RBC), haematocrit (HCT), haemoglobin (Hb) concentration, white blood cell count (WBC), total plasma protein (TP) concentration, platelet count (PLT), platelet volume (MPV) and ADP closure time (CT-ADP) were measured. CT was determined on a PFA-100® device using collagen/ADP cartridges. There were no significant differences in RBC, PLT and MPV between C and ACD horses pre-operatively. Reduced PLT was observed in the post-operative period. The mean CT-ADP of C horses was 96.43 ± 12.53 and 91.43 ± 2.51 seconds in the ACD group prior to surgery. CT-ADP was changed after surgery whereby CT-ADP time was more than doubled. We conclude that the PFA-100® can be used to detect platelet function defects in horses. |
Selecting plants with increased total polyphenol oxidases in the genus TrifoliumOriginal PaperHana JAKEŠOVÁ, Jana ŘEPKOVÁ, Jan NEDĚLNÍK, David HAMPEL, Jana DLUHOŠOVÁ, Martina SOLDÁNOVÁ, Martina OŠŤÁDALOVÁCzech J. Genet. Plant Breed., 2015, 51(4):155-161 | DOI: 10.17221/107/2015-CJGPB One of the aims in red clover (Trifolium pratense) breeding is to increase the polyphenol oxidase (PPO) activity, which may effectively reduce protein breakdown in silage and when cattle are fed by fresh clover. We analysed total PPO activity spectrophotometrically and on the level of gene expression using real-time quantitative PCR in single plants derived from an interspecific T. pratense × T. medium hybrid. Experiments were performed for two years and evaluated according to the general linear model with three factors (family, year, and cut). The analysis revealed considerable variability in total PPO activity between individuals and between families. Four families and two individuals with significantly higher PPO activity were selected. Their PPO activity ranged from 3.411 to 3.547 mkatal/min/g and from 4.041 to 5.731 mkatal/min/g, respectively, in comparison with the control variety Amos (2.370 mkatal/min/g). The majority of PPO transcripts were expressed by the two genes PPO1/5 and PPO2. In some genotypes, the PPO5 gene was expressed. Quantitative PCR confirmed the highest activity of PPO genes in seven hybrid plants with higher DNA contents corresponding to 30 chromosomes with 815 013 copies per plant. Our results indicate the suitability of combining two methods for improved selection: initial expression analysis to assess the PPO transcript level indicating gene activity and subsequent enzymatic assay. |
Effects of sodicity induced changes in soil physical properties on paddy root growthOriginal PaperP.K. Srivastava, M. Gupta, A. Pandey, V. Pandey, N. Singh, S.K. TewariPlant Soil Environ., 2014, 60(4):165-169 | DOI: 10.17221/926/2013-PSE A study was conducted to investigate the influence of sodicity induced changes in soil physical properties on paddy root growth in the normal agriculture, semi-reclaimed and sodic soils. The root growth (length, length density, biomass and distribution pattern) were unfavourably affected by the soil physical properties (bulk density, soil aggregate stability, available water content, hydraulic conductivity and soil water retention potential) in the case of sodic soil. The microbial biomass carbon, bacterial, fungal population and dehydrogenase activity showed the lower values in the case of sodosol compared to the normal soil. These soil biological properties tend to sustain paddy root growth in normal and semi-reclaimed soils. Principal component analysis revealed that soil physical properties accounted for 98.2% of total variance in root growth. The study revealed that salt stress induces changes in soil physical properties limiting paddy root growth in the salt affected soils. It is important to reclaim sodosols to alleviate salt induced physical stress for optimum paddy root growth. |
Macronutrient contents in the leaves and fruits of red raspberry as affected by liming in an extremely acid soilOriginal PaperB. Sikirić, O. Stajković-Srbinović, D. Čakmak, D. Delić, N. Koković, Lj. Kostić-Kravljanac, V. MrvićPlant Soil Environ., 2015, 61(1):23-28 | DOI: 10.17221/756/2014-PSE The study evaluates the effect of liming materials application in combination with NPK fertilizer and borax on macronutrient contents (nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg)), in an extremely acid soil and raspberry leaves and fruits during a two-year period. Liming increased soil pH, N mineral content, P, Ca and Mg soil content, while K content either increased (dolomite and borax application), or decreased (lime application). The N and P contents in raspberry leaves after liming increased significantly, but P content remained below the optimal values. Some treatments with lime caused a decrease in K content in leaves, while dolomite and borax application increased K content. Initially optimal Ca content in leaves increased significantly in the treatments with lime, but decreased after dolomite application. The Mg content in leaves increased after dolomite and borax application, but mainly remained below optimal values. Liming either did not alter or only slightly altered macronutrient contents in raspberry fruits. |
Evaluation of extractability of different extractants for zinc and copper in soils under long-term fertilizationOriginal PaperA.K. Pradhan, K.S. Beura, R. Das, D. Padhan, G.C. Hazra, B. Mandal, N. De, V.N. Mishra, K.B. Polara, S. SharmaPlant Soil Environ., 2015, 61(5):227-233 | DOI: 10.17221/971/2014-PSE We aimed to evaluate the extractability of different extractants for zinc (Zn) and copper (Cu) in soils of long-term field experiments covering different agro-ecological zones of India. The relationships between the amounts of Zn and Cu extracted by Mehlich 3, 0.1 mol/L HCl and AB-DTPA (ammonium bicarbonate-diethylenetriaminepentaacetic acid) with those extracted by DTPA, the conventional extraction method widely used in soil testing laboratories in India, were elucidated. The treatments of the long-term experiments included control (no fertilizer), 100% NPK, 50%NPK + 50% N through FYM (farm yard manure) and a fallow soil. Some important physico-chemical properties of soil like pH, organic carbon, textural class, CaCO3 content, etc. were analyzed. The NPK + FYM treatment was found to be the most effective treatment in terms of increased content of Zn and Cu in soils. The results showed that the amount of Zn and Cu extracted by Mehlich 3 were significantly correlated with that extracted by 0.1 mol/L HCl (r = 0.970** for Zn and r = 0.914** for Cu). Accordingly, Mehlich 3 and 0.1 mol/L HCl could be used effectively for estimating Zn and Cu availability in soils of India. However, Mehlich 3 was superior to all the other extractants used for the study. |
Effects of rice husk biochar application on the properties of alkaline soil and lentil growthOriginal PaperS. Abrishamkesh, M. Gorji, H. Asadi, G.H. Bagheri-Marandi, A.A. PourbabaeePlant Soil Environ., 2015, 61(11):475-482 | DOI: 10.17221/117/2015-PSE This study evaluated the effects of biochar application on some properties of an alkaline soil and on lentil (Lens culinaris Medik) growth. Lentils were grown in the soil amended with the rates of 0.4, 0.8, 1.6, 2.4, and 3.3 weight percent of two biochars (B1 and B2), produced from rice husk under different pyrolysis conditions. Lentils were harvested after 70 days. Soil samples were also analysed for changes in physico-chemical properties. The results indicated that biochar application significantly increased soil organic carbon, cation exchange capacity, available potassium and below ground biomass of lentil, while it decreased soil bulk density. The results suggested that biochar application to alkaline soils has benefits to both soil quality and plant growth. |
Index of Volume 51 (2015)IndexeditorsPlant Protect. Sci., 2015, 51(4):I-IX | DOI: 10.17221/8470-PPS |
Evaluation of selected properties of briquettes from recovered paper and boardOriginal PaperM. BrožekRes. Agr. Eng., 2015, 61(2):66-71 | DOI: 10.17221/61/2013-RAE Worldwide increasing energy demand is today permanently covered by a majority of non-renewable energy sources, namely by coal, crude oil and natural gas. This causes the rapid decline of their reserves and the time gets near when they will be run out. Therefore in the last years the exploitation of renewable energy sources has been permanently preferred. One of alternative fuel forms is fuel on the basis of paper waste. In this paper the results of tests are published, which were carried out using six sorts of recovered paper and board (group and grade 1.05, 1.06, 2.02, 2.05, 2.07 and 2.08 according to CSN EN 643:2002), pressed into the form of briquettes. During the tests following briquettes parameters were watched: moisture content, ash amount, gross calorific value, length and diameter, weight, density, rupture force and mechanical durability. It was proved that briquettes made from recovered paper and board compared with briquettes from wood waste are of high density, high mechanical durability and for their rupture, relatively high force is necessary. But at the same time they have high ash amount and low gross calorific value. |
Water stability of soil aggregates in different systems of tillageOriginal PaperJaroslava BARTLOVÁ, Barbora BADALÍKOVÁ, Lubica POSPÍŠILOVÁ, Eduard POKORNÝ, Bořivoj ŠARAPATKASoil & Water Res., 2015, 10(3):147-154 | DOI: 10.17221/132/2014-SWR The influence of various agrotechnical measures on macrostructural changes in topsoil and subsoil was studied in the course of a four-year experiment. Macrostructure was evaluated according to the ability of soil aggregate to resist degradation. Three variants of soil tillage were established: ploughing to a depth of 0.22 m, reduced tillage (subsoiling to 0.35-0.40 m, and shallow disking of soil to a depth of 0.15 m). For observation, three locations were chosen in various production areas of the Czech Republic with differing soil and climatic conditions. In these locations crops were grown under the same crop rotation: rapeseed (Brassica napus L.), wheat (Triticum aestivum L.), maize (Zea mays), wheat (Triticum aestivum L.), and barley (Hordeum vulgare). After four years of different tillage, a change in the water stability of soil aggregates (WSA) was evident. It was found out that reduced tillage of soil positively influenced both the WSA and the yield of the crops grown. A relationship of positive dependence between WSA, the content of humus substances, and cation exchange capacity of soil was also found. According to the obtained results, for agricultural practice a classification scale of structural quality was proposed on the basis of statistics of one variable (average, its mean error and distribution normality). |
The effects of a propofol/alfentanil admixture on total intravenous anaesthesia in dogs undergoing splenectomyOriginal PaperN. Jia, C. Zhao, L. Wang, Y. Li, J. Cui, S. Cao, R. Li, C. Wang, Y. Wu, A. WenVet Med - Czech, 2015, 60(4):194-201 | DOI: 10.17221/8107-VETMED The aim of this study was to compare the cardiovascular and respiratory effects and the bispectral scale index (BIS) as well as the recovery period characteristics in response to treatment with a propofol/alfentanil admixture of different concentrations in dogs undergoing splenectomy. We conducted a prospective, randomised, blinded experimental trial. Anaesthesia was induced and maintained by continuous-infusion anaesthesia of propofol and alfentanil or a propofol/alfentanil admixture after premedication with acepromazine (0.03 mg/kg). Dogs were assigned to receive different concentrations of the admixture. Changes in BIS value, heart rate (HR), respiratory rate (fR), non-invasive arterial blood pressure, pulse oximetry (SpO2), end-tidal carbon dioxide concentrations (ETCO2) and rectal temperature (RT) were recorded at predefined time points during anaesthesia. Data [mean ± standard deviation (SD)] were analysed by analysis of variance (ANOVA) for repeated measures followed by a Dunnett's test and Student's t-test (P < 0.05) and where necessary, the Mann-Whitney U-test. No significant differences were found between groups with respect to age, body mass, SpO2, ETCO2, fR, systolic, diastolic and mean arterial blood pressure (SAP, DAP and MAP). BIS values were significantly lower in Group 2 when compared to Group 1 at T7, T8, T9. The HR of Group 2 was significantly lower at T2 to T9 when compared to Group 1. The propofol and alfentanil admixture provided satisfactory results in dogs undergoing splenectomy. Thus, an admixture of propofol/alfentanil may be used for total IV anaesthesia in dogs at the infusion rates determined in this study. |
Equine ocular squamous cell carcinoma: a case reportCase ReportM. Drazek, M. Lew, S. Lew, J. Szarek, I. Balicki, L. Della SaldaVet Med - Czech, 2015, 60(7):379-386 | DOI: 10.17221/8386-VETMED An eight-year-old gelding, Wielkopolski Horse was presented with a pink tumour, which filled the entire palpebral fissure of the left eye. Ultrasonography revealed it to be well-demarcated from the cornea mass, which covered its entire surface. Due to the extensive size of the lesion and the lack of owner's consent to post-operative treatment, it was decided to perform enucleation. A histopathological examination revealed corneal squamous cell carcinoma (CSCC). The primary cause of the tumour has not been established. Immunohistochemistry was negative for p16 immunoreactivity which is typical for the E7 oncoprotein in PV infection, and is suspected of involvement in the aetiopathogenesis of ocular squamous cell carcinoma (OSCC). |
Influence of Saccharomyces cerevisiae strain on the profile of volatile organic compounds of blossom honey meadFood Chemistry and SafetyIldikó Bénes, Katarína Furdíková, Daniela ŠmogrovičováCzech J. Food Sci., 2015, 33(4):334-339 | DOI: 10.17221/48/2015-CJFS The influence of yeast strain on the volatile profile of meads fermented from blossom honey using three different Saccharomyces cerevisiae var. bayanus strains was evaluated. Meads were analysed by methods of basic chemical analysis and gas chromatography after 15 days of fermentation. Individual yeast strains produced various metabolites in different concentrations under the same fermentation conditions which significantly influenced the final secondary aroma of mead. Higher concentrations of acetaldehyde and 1-propanol, associated with S. cerevisiae var. bayanus MM-R2 considerably distinguished this strain from the others, whereas the difference between strains S. cerevisiae var. bayanus FM-R-Fix1 and MT-R1B was characterised by the production of ethyl hexanoate, ethyl octanoate (FM-R-Fix1), and isobutyl alcohol (MT-R1B). |
QTL mapping for adult-plant leaf rust resistance genes in Chinese wheat cultivar Weimai 8Original PaperJiazhen WANG, Zaifeng LI, Lingzhi SHI, Lin ZHU, Zhikuan REN, Xing LI, Daqun LIU, Syed Jawad Ahmad SHAHCzech J. Genet. Plant Breed., 2015, 51(3):79-85 | DOI: 10.17221/51/2015-CJGPB The wheat cultivar Weimai 8 is a good source of adult-plant resistance to leaf rust in China. In order to understand the genetic background of the resistance genes, 179 F2:3 families derived from the cross Weimai 8 and Zhengzhou 5389 (susceptible to leaf rust) were used to construct a linkage map. Results showed that there was a major QTL on chromosome 2AS, temporarily named QLr.hbau-2AS, responsible for the resistance. QLr.hbau-2AS from the resistant parent Weimai 8 was between the SSR markers Xcfd36 and Xbarc1138, with an interval length of 2.58 cM. In the 2010-2011, 2011-2012 and 2012-2013 crop seasons, it explained 25.79, 71.55 and 60.72% of the phenotypic variation, respectively. The location of QLr.hbau-2AS was close to the leaf rust resistance gene Lr37. However, they may not be the same since QLr.hbau-2AS has a different virulence test response from Lr37. This study identified two closely linked flanking molecular markers QLr.hbau-2AS and these molecular markers will help marker-assisted selection in breeding resistant cultivars in the future. |
Influence of sowing density on agronomic traits of lupins (Lupinus spp.)Original PaperA. Pospišil, M. PospišilPlant Soil Environ., 2015, 61(9):422-425 | DOI: 10.17221/436/2015-PSE The aim of the research conducted on eutric brown soil on the experimental facility of Faculty of Agriculture, University of Zagreb in 2012 and 2013, was to determine the optimal sowing density for two cultivars of white lupin (Teodora and Energy) and a cultivar of narrow-leafed lupin (Arabella). The study included three sowing densities: 60, 75 and 90 germinated seeds/m2. The cultivars of white lupin achieved significantly higher seed yield, higher 1000 seed weight, higher weight of seeds per plant and higher protein content in the seed, compared to the cultivar of narrow-leafed lupin. The sowing density had no effect on seed yield, but the increase in sowing density above 60 germinated seeds/m2 significantly reduced the number of pods, the number of seeds and seed weight per plant. |
First report of Fusarium poae associated with and/or causing silvertop on loloid-type Festulolium in the Czech RepublicOriginal PaperJan NEDĚLNÍK, Miroslava STREJČKOVÁ, Tereza SABOLOVÁ, Bohumír CAGAŠ, Zdeněk BOTH, Jana PALICOVÁ, Bronislava HORTOVÁPlant Protect. Sci., 2015, 51(3):136-140 | DOI: 10.17221/19/2015-PPS Silvertop is a serious disease of grasses, and severe infestations cause a great deal of damage every year (particularly to seed producers). Inflorescences of infected plants dry prematurely and are sterile. The genera Festuca, Poa, Agrostis, Trisetum, and Cynosurus are the most frequent hosts of this disease, which has newly been reported in a loloid-type intergeneric Festulolium hybrid. The disease was also observed in the genus Lolium, with only rare previous description. The suspicion that Fusarium poae is the causal agent of severe silvertop was confirmed, and the pathogen was morphologically described and confirmed by molecular analysis. The meadow plant bug (Leptopterna dolabrata) may be a vector transferring the pathogen to plants, although a direct pathogen transfer was not demonstrated. Grass colonisation by the pathogen therefore apparently occurs after plant tissues injury by sucking of the meadow plant bug. |
Eggshell quality and calcium utilization in feed of hens in repeated laying cyclesH. Arpášová, M. Halaj, P. HalajCzech J. Anim. Sci., 2010, 55(2):66-74 | DOI: 10.17221/90/2009-CJAS Hens of the laying hybrid Shaver Starcross 288 were used in two consequential experiments. The first experiment (for 10 months) was conducted on hens at the age from 18 to 60 weeks (1st cycle; n = 50) and moulted hens after 10 months laying from 70 to 110 weeks of age (2nd cycle; n = 50). For the second experiment (for 8 months) in the 1st cycle 18 weeks old hens were bought (n = 60) and hens from the first experiment after moulting were used in the 2nd and 3rd cycle (n = 32 and n = 28). During the experiments eggshell qualitative parameters and calcium utilisation (%) were determined. The results indicate that the percentage of eggshell decreased with the increasing number of cycles. The significant correlation of the eggshell proportion and the age of hens was higher in long, advanced cycles (P < 0.05). The shell strength in both experiments decreased slightly in relation to the age of hens and repeated laying cycles. The shell deformation had an opposite trend to the shell strength, i.e. it increased with the increasing laying. The average shell thickness showed a decrease in the repeated laying cycles, more significant in shorter cycles (P < 0.01). The specific shell gravity maintained balanced values both in cycles and by the age of hens. The shell density in all cycles in both experiments showed a decreasing tendency in relation to the age of hens. In dietary calcium utilization for the shell formation a significant decrease was recorded in the second cycles after moulting (P < 0.05). |
The influence of grassing and harvest management on microbial parameters after arable land setting-asideK. Voříšek, L. Růžek, M. Svobodová, J. Šantrůček, S. Strnadová, E. PopelářováPlant Soil Environ., 2002, 48(9):382-388 | DOI: 10.17221/4384-PSE During the years 1998-2000 soil chemical (Corg, Nt, pH), textural (sand, silt clay) and microbiological (microbial biomass carbon - CMB, microbial extracellular carbon - CEX, respiration, ammonification, nitrification) characteristics were tested on grassed chernozem [mollisol] after arable land setting-aside. Different harvest management was also tested: black and green fallow, one or two mulching per year, three cuts with plant biomass removal. For the evaluation of the influence of management and plants we have used three main criteria: (1) µg CMB/g dry soil, (2) ratio CMB/Corg (%), (3) µg CEX/mg CMB or eight criteria respectively: (4) ratio of measured and model values of CMB, (5) ratio of measured and model values of CEX/CMB, (6) potential respiration with glucose, (7) potential ammonification with peptone and (8) potential nitrification with (NH4)2SO4. According to these criteria, the best harvest management after arable land setting-aside from 5 different systems, which were tested, could be based on one or two mulching per year. It could be stressed that the two mulching was evaluated as the best in sum of dry mass yield (27.5 for mixtures, 20.1 for legumes and 14.2 for grasses - in t/ha/3 years). The use of legumes (Trifolium repens L. - Medicago lupulina L. - Lotus corniculatus L. - Medicago media Pers.) or grasses [Bromus catharticus Vahl - Arrhenatherum elatius (L.) Presl - Festuca pratensis Huds - Dactylis aschersoniana Graebn.] as cover plants was more successful than the use of their mixtures. |
Expression analysis of the porcine Homeobox A11 gene and its association with litter size in Large White pigsOriginal PaperR. Lin, H. Jia, S. Chen, S. ZhaoCzech J. Anim. Sci., 2016, 61(5):243-249 | DOI: 10.17221/127/2014-CJAS The homeobox A11 (HOXA11) gene, a well-known transcriptional regulator, plays a critical role in normal development of the uterus. In this study, the porcine HOXA11 gene, including its promoter region, was cloned and sequenced (GenBank Accession No. KF724933). Differential expression levels of HOXA11 in the endometrium at one stage of the estrous cycle and three stages of gestation for Meishan and Large White pigs were investigated. Association between the single nucleotide polymorphism (SNP) and litter size was conducted. Results suggested that expression of the HOXA11 gene was the highest on day 15 and decreased on day 26 of gestation, reaching a minimum level of expression on day 50 of gestation in Large White pigs. Expression of the HOXA11 gene tended to be consistent between day 15 of the estrous cycle and day 26 of gestation, and decreased on day 50 of gestation in Meishan pigs. Series deletion analysis and reporter expression assays identified a promoter region of the HOXA11 gene which possessed a five times higher promoter activity than the pGL3-Basic vector. Using comparative sequencing, a candidate SNP (KF724933:g.2325C>A) was identified. In a Large White pig population, this polymorphism was associated with the number of piglets. In a combined analysis containing all parity groups, sows with the AC genotype had greater total number of born (1.80; P < 0.05) and number of born alive (1.82; P < 0.05) piglets compared with the CC genotype sows. These results indicate HOXA11 may play a role in the regulation of embryo implantation in pigs. |
Histometric evaluation of meat products - determination of size and number of objectsB. Tremlová, P. ŠtarhaCzech J. Food Sci., 2002, 20(5):175-180 | DOI: 10.17221/3529-CJFS In the framewort of the quantitative histologic evaluation of poultry products, the size and the number of bone fragments have been determined using the image analysis. Bone fragments were identified by their colour and analysed automatically. The samples contained 135 to 2167 bone particles the length of which varied from 5 to 2088 μm. Comparing products of the same kind, we found differences in the contents of bone fragments; this fact was possibly due to inadequate observance of the technological procedure by some producers. |
Effect of early nutritional experience on the feeding behaviour of adult female ratsZ. Šefčíková, Š. MozešVet Med - Czech, 2002, 47(10):315-322 | DOI: 10.17221/5841-VETMED In the present paper the effect of postnatal undernutrition on feeding behaviour has been evaluated in mature female Wistar rats subjected to food restriction a) during the suckling period, i. e. up to day 15 (SR), b) during the weaning period from day 15 to 30 (WR), c) throughout 30 days post partum (SWR) and d) during adulthood, i.e. from day 60-75 of life (AR). In comparison with the ad libitum fed controls (C), the lactating mothers and the pups of the food-restricted groups were allowed free access to food for only two hours daily. In experimental groups this restriction was then changed to an ad libitum regime. On day 90 food intake was evalu-ated daily in five 20 min lasting sessions after 23 h of fasting in group-housed and single-housed rats exposed to their home as well as to their experimental environment. The significantly decreased body weight found on day 30 and 90 in females coming from litters of restrictedly fed mothers, as compared with those fed ad libitum, showed that these animals were considerably undernourished. Appetitive motivation increased in those groups of females that had been exposed to a restricted feeding regime during their infant period but remained unaffected in females restrictedly fed during their adult age. In comparison with the ad libitum fed controls and AR groups, significantly increased mean food intake was observed in all postnatally underfed groups (P < 0.001). The greatest inclination to hyperphagia and qualitative changes in feeding behaviour were observed in SWR females whose feeding regime was restricted for the longest time, i. e. during the suckling and the weaning period, as compared to groups with shorter food restriction. These animals showed hyperphagia even in the new environment regardless whether the whole group or only one female was tested. Our results reveal a) a determinant influence of the feeding regime of the animals at early age (41%) while environmental and social factors represent only about 17% and 4%, respectively and that b) changes in feeding habits in adult female rats may significantly depend on the length of postnatal undernutrition. |
Use of selected allowable cut indicators in near-natural forest managementOriginal PaperR. Marušák, A. ŽíhlavníkJ. For. Sci., 2002, 48(4):173-184 | DOI: 10.17221/11872-JFS The objective of this paper is to evaluate the possibilities of using selected allowable cut indicators in near-natural forest management by supplementing two indicators to present allowable cut indicators. Namely it is 1/30 of forest stand growing stock of the last three age classes and higher and 1/40 of forest stand growing stock of the last four age classes and higher. These indicators are compared with the allowable cut indicator 1/20 of forest stand growing stock of the last two age classes and higher which in relation to the forest law can be used in the present control of cuttings. The evaluations were carried out at selected five forest user's units where near-natural forest management is applied. The results confirmed that it is not possible to use the indicator 1/20 in environmentally sound silvicultural systems. The results demonstrated the continuity of cuttings if the indicator 1/30 was used |
The use of PCA, FA, CA for the evaluation of vegetable juices processed by lactic acid fermentationJ. Karovičová, Z. KohajdováCzech J. Food Sci., 2002, 20(4):135-143 | DOI: 10.17221/3524-CJFS The cabbage-carrot juices were inoculated with Lactobacillus plantarum 92H at the concentration of 8 × 106 CFU/ml and fermented in a thermostat at 24°C for 150 hours. During the fermentation, both analytical (pH, total acidity, reducing sugars, l-ascorbic acid, lactic, acetic and citric acids, biogenic amines) and sensory (appearance, colour, turbidity, sediment and taste) parameters were followed. For the evaluation of the results of the chemical and sensory (taste) analyses of these juices the multivariate statistical methods were applied. PCA and FA reduced the 7 original analytical variables to 1 independent component (factor) that accounted for 96.92% of the total variance, and CA divided samples into 2 groups according to the contents of lactic and acetic acids. PCA and FA reduced the 8 taste and mixture taste descriptors to 2 components (factors) that accounted for 97.28% of the total variance. |
Natural regeneration of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) in forest stands of Hurky Training Forest District, Higher Forestry School and Secondary Forestry School in PisekF. BušinaJ. For. Sci., 2007, 53(1):20-34 | DOI: 10.17221/2083-JFS Possibilities are assessed of the natural regeneration of Douglas fir under conditions of Hůrky Training Forest District, Higher Forestry School and Secondary Forestry School in Písek, in stand 12C7, forest type 3K5. The stand is situated at an altitude of 430 m above sea level in an area with mean annual temperature 7.3-7.5°C and mean annual total precipitation 550-575 mm. Under the stand dominated by Douglas fir (65 years of age), natural regeneration of the mean density of 53,800 seedlings/ha appeared due to lateral light coming from the north. The highest density of Douglas fir natural regeneration was noticed under the stand 10-14 m from the stand margin. The light penetrating through the marginal stand wall was found to be of greater effect on the density of natural regeneration than the upper shading caused by the parent stand. With this method of regeneration, Douglas fir is less light-demanding than spruce. Height and height increment of advance regeneration were greater in places with sufficient light near the stand margin. Thus, natural regeneration of Douglas fir is successful there giving conditions for the origin of a new generation of the stand with a sufficient proportion of Douglas fir. |
Cadmium distribution coefficeints and Cd transport in structured soilsĽ. Lichner, A. ČipákováPlant Soil Environ., 2002, 48(3):96-100 | DOI: 10.17221/4206-PSE In the case of cadmium transport via soil macropores, the short-term duration of an interaction between the reactive solute in aqueous phase and soil, as well as cadmium precipitation or adsorption on particles < 10-5 m should be taken into account. Two distribution coefficients are proposed for predicting the cadmium transport in a structured soil: the matrix distribution coefficient Kdm, equal to the equilibrium distribution coefficient Kdeq and estimated using the conventional batch technique, and the macropore distribution coefficient KdM, estimated using the modified batch technique. It was found that the conventional approach (using the coefficient Kdeq only) would underestimate a penetration of the part of Cd transported in the macropores about 255-times in the loamy-sand soil in Kalinkovo, 20-times in the loam soil in Macov, and 122-times in the clay soil in Jurová in comparison with the approach proposed in this study. |
