Fulltext search in archive



« advanced mode »

 previous    ...   44   45   46   47   48  49   50   51   52   53   ...    next 

Results 1411 to 1440 of 1934:

The use of indirect methods for the prediction of lucerne quality in the first cut under the conditions of Central Europe

J. Hakl, J. Šantrůček, P. Fuksa, L. Krajíc

Czech J. Anim. Sci., 2010, 55(6):258-265 | DOI: 10.17221/86/2009-CJAS

The goal of this study was to compare the growing degree-days (GDD) and predictive equations for alfalfa quality (PEAQ) for the prediction of lucerne quality and to test their accuracy and suitability in the first cut period in Central Bohemia. Several additional stand parameters were verified in order to increase the accuracy of the quality estimate under these environmental conditions. In 2004-2007, the measurement and sampling were repeatedly realized from the late vegetative to the early bloom stage in six replications. For the GDD model across the years, the obtained R2 for NDF, ADF and CP were 0.40, 0.57 and 0.65, respectively. It seems that the forage quality response to accumulated GDD was related to the stand development and it could be the reason for low R2 across all the years. For the PEAQ model, R2 were 0.62, 0.92, and 0.85, respectively. Similarly like in the GDD model, the effect of stand development across the years on changes in the slopes of equations was observed. The accuracy of the model combination was not higher in comparison with the PEAQ model. The count of stems per plant, density of stems per m2, dry matter yield and average stem weight improved the NDF content prediction within a four-year period. In these models, variables which represent the stand development should be taken into account.

Dioszeghyana schmidtii (Diószeghy 1935), and survey its presence and abundance (Lepidoptera: Noctuidae; Hadeninae)

M. Turčáni, J. Patočka, J. Kulfan

J. For. Sci., 2010, 56(3):121-129 | DOI: 10.17221/55/2009-JFS

Dioszeghyana schmidtii (Diószeghy 1935), is forest species protected by European Union. Its distribution has been studied essentially by the use of light traps. However, its biology and habitat preferences are not sufficiently known and thus its habitats may be damaged by forest management. We suggest the beating method in order to collect larvae as an useful way to record and to survey D. schmidtii. Larvae of the species can be collected by beating branches of its host plants (Quercus and Acer species) in the lower canopy (below 3 m). Optimal survey time would be the second half of May and the first half of June. Differences between the larvae of D. schmidtii and 16 similar moth larvae, as well as, Tenthredinidae (Hymenoptera) species living at the same time on the same trees are described and figured in a key to identification. The method described in the paper allows one to identify larvae in the field. Results are discussed.

State and evaluation of information and communication technologies development in agricultural enterprises in the Czech Republic

J. Vaněk, E. Červenková, J. Jarolímek, P. Šimek

Plant Soil Environ., 2010, 56(3):144-147 | DOI: 10.17221/212/2009-PSE

The paper presents selected information on the newest results of a wide investigation of the state of information and communication technologies development in agricultural production enterprises in the Czech Republic. The investigation was realized in the first half of 2009 with the main aim to analyze development of information infrastructure and actual trends in ICT use in rural regions where most entrepreneurial subjects operate. Besides a presentation of own research results, some obtained pieces of knowledge are then commented and eventually discussed in connection with official outputs of the Czech Statistical Office (CSO), if they have a certain relevance to the given problems.

Inflammatory polyp in the middle ear of a dog: a case report

A. Blutke, B. Parzefall, A. Steger, T. Goedde, W. Hermanns

Vet Med - Czech, 2010, 55(6):289-293 | DOI: 10.17221/2991-VETMED

Nasopharyngeal polyps are non-neoplastic masses, originating from the mucosa of the nasopharynx, the tympanic bulla or the Eustachian tube. Inflammatory polyps extending into the tympanic bulla cavity are a common cause of otitis media in cats. In dogs, however, occurrence of middle ear polyps has rarely been reported. The present report describes the findings of the clinical examination, diagnostic imaging and histopathological appraisal of a ten year old male dog with an inflammatory middle ear polyp arising from the mucosa of the Eustachian tube. Clinically, the dog displayed a peripheral vestibular syndrome. Magnetic resonance imaging revealed a hyperintense soft tissue mass filling the right middle ear cavity. Following ventral bulla osteotomy, a polypoid growth with a stalk arising from the auditory tube was surgically excised from the tympanic bulla. Histologically, the polyp was composed of a fibrous connective tissue stroma with discreet infiltration of inflammatory cells and an overlying surface layer of partially ulcerated respiratory epithelium. Similarities and differences between the histological appearance of the present case and the few previously reported records of canine middle ear polyps are discussed, along with a comparative review of etiological, pathogenetic and therapeutic aspects of middle ear polyps in cats and dogs

Effects of root pruning on the vegetative growth and fruit quality of Zhanhuadongzao trees

S. Yang, S. Xing, C. Liu, Z. Du, H. Wang, Y. Xu

Hort. Sci. (Prague), 2010, 37(1):14-21 | DOI: 10.17221/29/2009-HORTSCI

The effects of root pruning on the vegetative growth and fruit quality of six-year-old Zhanhuadongzao (Ziziphus jujube Mill.) trees were evaluated. Three root pruning treatments (severe, moderate and light degree) were conducted at the distance of 3, 5 and 7 times trunk diameter from trunk on both inter-row sides of the trees, respectively. The results showed that the severe root pruning decreased the length of primary branch by 27.9% and the number of primary branches by 12.1% in contrast to the control of no root pruning. Compared to the control, both severe and moderate root pruning had no apparent effects on nitrogen, phosphorus and potassium contents of leaves after 35 days, but had significant effects after 161 days. Severe root pruning had larger effectiveness of controlling vegetative growth than the moderate one. By root pruning, the contents of vitamin C and total sugar were increased but the content of cypermethrin was decreased in fruits and no effects were found on total acid content of fruit and yield at harvest. In the rhizosphere soil, root pruning decreased the microbial populations and enzymes activities but increased the concentrations of cypermethrin, available nitrogen, phosphorus and potassium. It is proposed that the removal of root at 3 times trunk diameter distance from trunk was feasible to regulate the vegetative growth and fruit quality of Zhanhuadongzao tree.

Repatriation of lost old grass varieties to the germplasm collection of the Czech Republic

M. Ševčíková

Czech J. Genet. Plant Breed., 2010, 46(10):S37-S39 | DOI: 10.17221/1518-CJGPB

In former Czechoslovakia, grass breeding was located in the three distinct regions of Southern Bohemia and Northern Moravia during the 1920's; and later in Slovakia in the 1940's. This resulted in the development of 45 cultivars of 17 grass species which originated from local ecotypes and were named after the place of their breeding (e.g. Táborský, Větrovský, Rožnovský, and Levočský). Most of these historical cultivars were not preserved in any national germplasm collection, and the number of missing accessions amounted to 27 of the 34 deleted varieties. Using the findings about unpreserved materials of Czechoslovak origin in the European Central Crop Databases, as well as the EURISCO web catalogue, it was possible to repatriate 7 historical cultivars (Arrhenatherum elatius Větrovský, Festuca pratensis Větrovská, Festuca rubra Rožnovská, Lolium perenne Táborský, Phleum pratense Větrovský, Poa nemoralis Rožnovská, and Poa pratensis Levočská) from the gene banks of the neighbouring European countries. The accessions were regenerated, and their seed has been stored ex situ in the Gene Bank of the Crop Research Institute in Prague.

The effect of time of cutting on yield and the quality of the hop hybrid varieties Harmonie, Rubín and Agnus

K. Krofta, J. Ježek

Plant Soil Environ., 2010, 56(12):564-569 | DOI: 10.17221/187/2010-PSE

The influence of mechanized cutting time on the yield and quality of hops was studied for three years (2007, 2008 and 2009) in three Czech hybrid varieties Harmonie, Rubín and Agnus. The cutting term classified as 'early' was carried out at the turn of March and April. Further cutting dates were made at intervals of 7-10 days and they were classified as 'middle' and 'late' ones. Yield and contents of alpha acids were evaluated during the machine harvest. The measured data revealed no statistical relationship between term of cutting, alpha acid content and yield in any of the tested cultivars. However, during the experimental period considerable inter-annual differences were observed, especially in the yield. Average yield in the range of 2.0-2.5 t/ha in the period 2007-2008 decreased to 1.2-1.9 t/ha in 2009 due to downy mildew attack. On the basis of the obtained data it can be recommended to cut the hybrid varieties Harmonie, Rubín and Agnus in the first ten days of April, taking into account other factors such as age and the location of hop garden and current weather conditions.

A histological evaluation of bone calluses in the treatment of tibia fractures in sheep with the use of a semicircular fixator

Z. Adamiak, T. Rotkiewicz

Vet Med - Czech, 2010, 55(11):547-550 | DOI: 10.17221/3013-VETMED

This study discusses the results of a histological examination of bone calluses in the treatment of tibia fractures in sheep with the involvement of a semi-circular fixator. In all sheep, callus samples revealed the presence of well-developed, compact bone tissue in the area of fracture healing. It was found that the use of a semi-circular fixator promoted bone growth, and that it is an effective method for tibia fracture treatment in sheep.

Development of agricultural foreign trade in the countries of Central Europe

Miroslav SVATOŠ, Luboš SMUTKA

Agric. Econ. - Czech, 2010, 56(4):163-175 | DOI: 10.17221/22/2010-AGRICECON

This paper analyses the development of agricultural foreign trade in Austria, Hungary and the Czech Republic with the aim of uncovering the changes that have impacted the Central European agricultural trade over the ten year period (1999-2008). It issues from the results of the analysis of agricultural trade in the aforementioned countries, which has changed dramatically in terms of the commodity structure, the territorial structure and primarily the value structure. The main changes to have caused most of the changes to the individual characteristics of agricultural foreign trade in the particular countries under analysis are the process of the EU enlargementy, the adoption of obligations to ensue from the EU membership and the concentration in the internal market of the EU countries. We can see the actual changes in the commodity and territorial structure of the trade carried out in the individual countries under analysis. The changes which have occurred resulted in a dominant share of the member countries of the EU 27 in the agricultural trade of the individual countries under analysis.

Safety and quality of farm fresh goat's cheese in the Czech Republic

Bohumíra Janštová, Michaela Dračková, Šárka Cupáková, Hana Přidalová, Markéta Pospíšilová, Renáta Karpíšková, Lenka Vorlová

Czech J. Food Sci., 2010, 28(1):1-8 | DOI: 10.17221/210/2008-CJFS

The composition and selected physical and chemical parameters of 44 samples of fresh goat cheeses produced on a farm in the Czech Republic were determined. The following average values were obtained for the parameters analysed: pH 4.87 ± 0.14, titratable acidity (SH) 98.09 ± 4.93, dry matter 46.83 ± 1.57%, fat in dry matter 52.74 ± 5.24%, sodium chloride (NaCl) 2.08 ± 0.54%, and aw 0.979 ± 0.007. All samples showed excellent sensory characteristics and their compositions corresponded to those declared by the producer. Microbiological tests were used for the detection of Enterobacteriaceae spp., lactic acid bacteria, Escherichia coli, Enterococcus spp., Staphylococcus aureus, Bacillus cereus, Salmonella spp. and Listeria monocytogenes. Under the applicable regulations, the analysed fresh goat's cheeses were microbiologically safe and had the appropriate physical and chemical characteristics.

Multiplex PCR assay to detect rust resistance genes Lr26 and Lr37 in wheatShort Communication

Taťána SUMÍKOVÁ, Alena HANZALOVÁ

Czech J. Genet. Plant Breed., 2010, 46(2):85-89 | DOI: 10.17221/32/2010-CJGPB

Multiplex PCR was developed and optimized for simultaneous detection of wheat leaf rust resistance genes Lr26 and Lr37. The presence of the genes was analyzed in 21 winter wheat cultivars registered in the Czech Republic. Gene Lr37 was detected in four tested cultivars (Bakfis, Biscay, Nicol, Mulan), gene Lr26 occurred only in one cultivar (Etela) and three cultivars (Clarus, Orlando and Rapsodia) were found to carry both these genes. Data obtained by PCR markers were compared with results of greenhouse and field tests. Seedling reactions of cultivars possessing Lr26 to seven different leaf rust isolates conformed to the results obtained by the marker analysis, however, there were found some discrepancies in the detections of Lr37, which could be detected in greenhouse seedling tests only with difficulties.

Different approaches to the classification of vertical structure in homogeneous and heterogeneous forests

V. Šebeň, M. Bošeľa

J. For. Sci., 2010, 56(4):171-176 | DOI: 10.17221/49/2009-JFS

The paper shows difficulties in the evaluation of the forest status when considering forests with different height structure (uneven-aged forests). It is the main problem in categorizing such forests. Concerning the actual forest management conception in Slovakia, it is assumed that the area of forests with close-to-nature management system will increase. It leads to more structured forests, as for the tree species, age, height, as well as the spatial structure. The typical vertically homogeneous forests account for only 50% of all Slovak forests, according to results from the National Forest Inventory in Slovakia (NFI SR). During the processing of NFI data the stands were divided into 2 classes as follows: (i) vertically homogeneous stands, which are classified into nine growth stages; (ii) vertically heterogeneous stands, which are classified into two growth stages (lower and advanced), and stands in the process of regeneration. New approaches are not based on the visual subjective estimation of forest homogeneity, but on objective analyses of measured values from inventory plots (tree heights, diameters, and age). The paper shows a new approach to the classification of forest stands on an example of the variability of measured heights on inventory plots from NFI.

Costs of basic methods of forest landmaintenance in protective zones of high-voltage power lines in the Czech Republic

L. Šišák

J. For. Sci., 2010, 56(1):35-41 | DOI: 10.17221/75/2009-JFS

: The paper describes the basic potential methods and their costs of maintenance of forest lands in protective zones under high-voltage power lines (HVPL) 400 kV and 220 kV. In the present situation and with available information and data, it was possible to accomplish the average cost calculations for the whole area of the Czech Republic. The paper analyses the following mechanical and chemical methods of maintenance of forest lands: full-area scrub clearing with power saw (PS), selective individual scattered clearing of trees with PS, full-area scrub clearing by milling, full-area scrub clearing by the application of herbicides and arboricides, selective individual scrub clearing of individual trees by cutting followed by spray treatment with arboricides. The maintenance of forest lands in zones of HVPL (scrub clearing) by milling belongs to the economically most convenient mechanical methods, for example when removing 3,000 trees.ha-1, the cost of this option is 20,000-23,000 CZK.ha-1ha in a period of 3-year periodic frequency, while the most expensive method is selective individual scrub clearing of scattered individual plants with PS at costs of around 84,000 CZK.ha-1.

A trend of proliferation of proleptic shoots in partial populations of Scots pine

J. Nárovcová, V. Nárovec

J. For. Sci., 2010, 56(12):571-579 | DOI: 10.17221/79/2009-JFS

The incidence of the summer (late-seasonal) growth of shoots was monitored following the planting of Scots pine from different provenances of the Czech Republic and different planting regimes in an experimental plot in Týniště nad Orlicí. In the third year after reforestation the local populations had the highest proportion of summer growth of the shoots (18%) compared to other populations. From the second to the fourth year after planting the percentage proportion of summer shoots was determined for the species Scots pine in conditions of the Polabí region, it was 13.5% of the individuals in each year. The analysis of stem sections demonstrated double rings as a result of the cambium activation through the growth of summer shoots.

Effect of perforated foil and polypropylene fibre covers on growth of early potato cultivars

W. Wadas, E. Kosterna, A. Kurowska

Plant Soil Environ., 2009, 55(1):33-41 | DOI: 10.17221/379-PSE

This paper presents the results of a three-year research on the effect of perforated polyethylene foil and polypropylene fibre covers on the growth of early potato cultivars at various lengths of plant covering period (2 and 3 weeks after plant emergence). Plants grown under covers were higher, produced higher mass of above-ground parts, and were characterised by a smaller value of leaf weight ratio (LWR) and leaf area ratio (LAR) compared with the cultivation without covering. In the case of plant covering for 2 weeks after emergence the mass of leaves at the time of cover removal was on average almost 2 times higher and the mass of stems over 2.5 times higher than in the cultivation without covering; the values of LWR and LAR were however smaller by 0.094 and 0.137 m

Effects of drainage treatment and stand growth on changes in runoff components from a forested watershed

V. Černohous, F. Šach, D. Kacálek

J. For. Sci., 2010, 56(7):307-313 | DOI: 10.17221/103/2009-JFS

Runoff generation under various natural conditions has often been studied in forested watersheds for a long time. In 1967, Hewlett designed a variable source area model. The model is based on the expansion and shrinkage of variable source areas and consequent changes in a drainage network during a discharge event. The runoff investigation was carried out in a forested watershed situated in the summit area of the Orlické hory Mts. The watershed has a drainage area of 32.6 ha with the land-surface elevation ranging from 880 to 940 m a.s.l. Runoff components, their amounts and ratios were calculated using a simple graphical-mathematical method of the hydrograph recession limb analysis according to a reservoir model representing the particular components (base flow, subsurface flow and overland flow, in other words slow, accelerated and rapid flows). Comparing the amount of slow and rapid runoff constituents (89.5-99.4% and 0.6-10.5%, respectively), the greater amount of slowly moving water confirmed that overland flow was absent under conditions of forest environment. Not even the drainage treatment altered this positive ratio of the runoff constituents. During the third period, under stabilized hydrology and stand conditions, the accelerated and rapid runoff increased again, however maximally by 10% and 4%, respectively, not reaching the initial size of the calibration period.

Repair of cleft palate in a calf using polypropylene mesh and palatal mucosal flap: a case report

O. Smolec, D. Vnuk, J. Kos, N. Brkljaca Bottegaro, B. Pirkic

Vet Med - Czech, 2010, 55(11):566-570 | DOI: 10.17221/3015-VETMED

The soft palate plays a critical role in the oral and pharyngeal phases of swallowing. Congenitally cleft soft palates (palatoschisis) in calves are rare and pose a serious challenge for surgical correction due to high complication rates. The main obstacles to repairing palate defects are obtaining complicated access to the soft palate, and reducing the tension on the repair so that the sutures hold. A 21 day old female Simmental calf was submitted to our clinic with a history of frequent episodes of coughing and milk dripping from its nostrils after suckling. After clinical examination, a congenital cleft palate was diagnosed. Surgery was performed under general anaesthesia. First, lateral buccotomy was performed to improve the intraoral approach. The palatal defect was repaired using polypropylene mesh and palatal mucosal flap. An oesophageal tube was placed and anchored to the skin using a Chinese finger trap suture technique. Antibiotic treatment was continued through seven days and a transoesophageal feeding tube was fitted at the end of the surgery allowing the calf to be fed with milk during the postoperative period. Postoperatively, the caudal aspect of the repair broke down resulting in persistent mild bilateral nasal discharge. A combination of the two described techniques can be a good option for resolving palatal defects. However, adequate exposure and repair are still difficult to achieve and these approaches often result in serious postoperative complications.

The influence of feeding diets containing white cheese, produced with prebiotics and the potentially probiotic Lactobacillus plantarum strain, on the gastrointestinal microflora of rats

Monika Modzelewska-Kapituła, Jan Kłobukowski, Lucyna Kłębukowska, Danuta Wiśniewska-Pantak

Czech J. Food Sci., 2010, 28(2):139-145 | DOI: 10.17221/187/2008-CJFS

The effects of inulin HPX and maltodextrins, and also the potentially probiotic Lactobacillus plantarum 14 strain, used separately and in combination in white cheese production, on the gastrointestinal microflora of Wistar rats was investigated. The prebiotic addition to the cheese was 2.5%, whereas probiotic and synbiotic cheeses contained at least 107 CFU/g of live L. plantarum cells. The counts of Bifidobacterium sp., Lactobacillus, coliforms, and the most probable number of anaerobic proteolytic bacteria were evaluated. After a 10-day feeding experiment, significant changes (P < 0.05) were noted in the most probable number of anaerobic proteolytic bacteria spores, which was the highest in the group receiving a diet with the cheese containing the potentially probiotic strain and inulin HPX. A short-time ingestion of low doses of prebiotics or synbiotics did not alter the counts of Lactobacillus, Bifidobacterium, and coliforms in healthy rats.

Visible foliar injury as a tool for the assessment of surface ozone impact on native vegetation: a case study from the Jizerské hory Mts

L. Matoušková, R. Novotný, I. Hůnová, V. Buriánek

J. For. Sci., 2010, 56(4):177-182 | DOI: 10.17221/61/2009-JFS

Surface ozone is considered to be a very phytotoxic gaseous air pollutant. Its negative impacts at both the cell and the organ level have been shown, mainly as a result of experiments. However, the demonstration of ozone negative impacts on native plants is not explicit. An assessment of ozone impact on vegetation and ecosystems using indicators based on ambient ozone concentrations is insufficient and assessment techniques based on internal ozone dose and on real plant damage are more appropriate. Such a possible technique is the mapping of ozone visible symptoms due to ozone influence. The ICP-Forest method concerning ozone visible symptoms and the assessment of ozone influence were applied for the purposes of this case study. The visible symptoms are characterized by a few typical signs. Nevertheless, the identification of visible symptoms in native conditions can be problematic and misleading conclusions could be drawn. Therefore it is necessary to complete the identification of visible symptoms with a validation in order to confirm ozone as the cause of plant injury.

Biochemical characterization and metabolic diversity of soybean rhizobia isolated from Malwa region of Central India

Mahaveer P. Sharma, Khushboo Srivastava, Sushil K. Sharma

Plant Soil Environ., 2010, 56(8):375-383 | DOI: 10.17221/247/2009-PSE

Soybean cultivation in many zones of India shows occurrence of native rhizobia besides other exotically adapted strains. In the current study, 22 rhizobial isolates (recovered from 12 different soybean growing sites) and 8 reference strains were selected for biochemical and metabolic characterization. Of 22 isolates, 18 were recovered as fast growing isolates while the rest were slow growing based on bromothymol blue (BTB) test. Unlike earlier belief that rhizobia have no ability to grow on glucose peptone agar medium, in this study, some isolates and some reference strains grew well on this medium. Similarly, when all the isolates were subjected to ketolactose test, some of the isolates were found to show growth on the medium. In contrast, based on C-utilization pattern (15 carbohydrates) a remarkable metabolic diversity was observed among the rhizobial isolates recovered in the study. The clustering and matching analysis showed that most of isolates were matching with slow growing reference strains, a few were with fast growing reference strains and some were found to be unique and hence not matching with any of reference strains. Such analysis suggests the occurrence of metabolically distinct types of rhizobia besides commonly known types (B. japonicum, B. elkanii and S. fredii) of soybean rhizobia and further validation is suggested through 16SrRNA gene sequencing technique.

Tremorgenic mycotoxicosis caused by Paspalum paspaloides (Michx.) Scribner infected by Claviceps paspali: a case report

M.R. Moyano, A.M. Molina, A.J. Lora, J. Mendez, A. Rueda

Vet Med - Czech, 2010, 55(7):336-338 | DOI: 10.17221/2964-VETMED

A natural poisoning case caused by ingestion of Paspalum paspaloides (Michx.) Scribner infected by Claviceps paspali in a bovine herd in Huelva (Spain) is described. This kind of intoxication, frequently described in South Africa and America is rare in Europe and this is the first description in Spain. Clinical signs, which affected 23 calves out of a total of 130 animals, consisted in a nervous syndrome characterized by tremor, hyperexcitability, incoordination, ataxia, depression and paralysis, signs that were aggravated when animals were subjected to certain types of exercises. The most relevant lesions were detected in the brain and consisted in microhaemorrhages diffused through the parenchyma of the brain, neuronal degeneration, satellitosis, neuronophagia, gliosis, and moderate neuropil degeneration in the peripheral zones of the brain.

The relationship between citrulline accumulation and salt tolerance during the vegetative growth of melon (Cucumis melo L.)

H.Y. Dasgan, S. Kusvuran, K. Abak, L. Leport, F. Larher, A. Bouchereau

Plant Soil Environ., 2009, 55(2):51-57 | DOI: 10.17221/316-PSE

Citrulline has been recently shown to behave as a novel compatible solute in the Citrullus lanatus (Cucurbitaceae) growing under desert conditions. In the present study we have investigated some aspects of the relationship which might occur in leaves of melon seedlings, also known to produce citrulline, between the capacity to accumulate this ureido amino acid and salt tolerance. With this end in view, salt-induced changes at the citrulline level have been compared in two melon genotypes exhibiting contrasted abilities to withstand the damaging effects of high salinity. Progressive salinization of the growing solution occurred at 23 days after sowing. The final 250 mmol/l external NaCl concentration was reached within 5 days and further maintained for 16 days. In response to this treatment, it was found that the citrulline amount increased in fully expanded leaves of both genotypes according to different kinetics. The salt tolerant genotype Midyat was induced to accumulate citrulline 4 days before the salt sensitive Yuva and as a consequence the final amount of this amino acid was twice higher in the former than in the latter. Compared with citrulline, the free proline level was found to be relatively low and the changes induced in response to the salt treatment exhibited different trends according to the genotypes under study. Thus at the end of the treatment mature leaves of the salt sensitive Yuva contained higher amount of proline than those of Midyat. The changes in the calculated molar ratio between citrulline and free proline suggested that salt tolerance might be associated with high values for this ratio and vice et versa for sensitivity. The interest of citrulline as a biochemical marker for salt tolerance of melon genotypes is discussed.

Monitoring of the relic endemics of Uzbekistan's flora

K.Sh. Tojibaev

Czech J. Genet. Plant Breed., 2010, 46(10):S45-S46 | DOI: 10.17221/698-CJGPB

The results from monitoring of two endemic species of Uzbekistan flora are shown. The first species examined was Otostegia bucharica B. Fedtsch. (Lamiaceae). This is an endemic species of Uzbekistan which is critically endangered. The second focus of this research was Thesium minkwitzianum B. Fedtsch. (Santalaceae), also an endemic species of western Tien Shan, that grows in the territory of the Chatcal Reseserve.

Growth and yield of safflower genotypes grown under irrigated and non-irrigated conditions in a highland environment

E. Öztürk, H. Özer, T. Polat

Plant Soil Environ., 2008, 54(10):453-460 | DOI: 10.17221/403-PSE

Producers in highland and semiarid regions have difficulty in increasing diversity in crop rotations due to unfavorable conditions imposed by cool temperatures, inadequate rainfall, and shorter growing periods. In such conditions, safflower appears as a promising alternative because it is cold and drought tolerant. The objective of this study was to determine the responses of the hybrid and open-pollinated safflower genotypes to irrigated and non-irrigated conditions in a highland environment. For this reason, the field research was performed during the years of 2001 and 2002 in eastern Anatolia, Turkey. According to the results of the study, safflower genotypes tested were well adapted to the cool and short-season conditions in this region. The response of seed yield to genotype varied depending on the growing seasons. The non-irrigated plants produced nearly the same seed yield as irrigated ones. Average seed yields of safflower genotypes tested were 914.3 and 928.0 kg/ha in 2001, and 1143.6 and 1139.9 kg/ha in 2002 years for irrigated and non-irrigated experiments, respectively. In general, the genotypes differed in all of the investigated traits. In both irrigated and non-irrigated experiments genotype × year interactions were very significant for all parameters. This research shows that in semiarid and highland environments safflower has a big potential value as an oilseed crop under dryland conditions.

The scenario of microfinance in Latin America against the international financial crisis

Gutierrez Ramirez Enver DALAN, Karel SRNEC

Agric. Econ. - Czech, 2010, 56(12):583-590 | DOI: 10.17221/49/2010-AGRICECON

Latin America has very good conditions for microfinance; the macroeconomic growth which Latin America had shown in the recent years created favourable conditions for the microfinance institutions' favorable conditions and its development. Profitability of the microfinance sector presents an attractive market for the financial institutions which already have a have strong position in the market. The purpose of this work is to focus on the current situation and performance of the microfinance sector while identifying some of the reasons that affect the microfinance institutions in this region. The work also provides a view on the microfinance industry development to get a better description of the sector. The microfinance institutions are earning an undeniable importance in the process of the regional development and represent an important factor in the alleviation of poverty and insecurity for large segments of the population. The work is based on information from relevant sources that allow us to identify the current status of microfinance in Latin America, especially in these times when the crisis affects also the region's economic dynamism.

Complete genome sequence of a Brome Mosaic Virus isolate from the Czech RepublicShort Communication

Sebastien Gadiou, Jiban Kumar Kundu

Czech J. Genet. Plant Breed., 2010, 46(4):178-182 | DOI: 10.17221/60/2010-CJGPB

An isolate of Brome mosaic virus (BMV) was originally isolated from Agropyron repens and maintained in Hordeum vulgare. The full-length genome of this isolate (BMV-CZ) was sequenced. Phylogenetic analysis revealed that BMV-CZ shared a minimum of 95.6% sequence identity, localized in the 5'-UTR of RNA-1 with the other BMV isolates from the database, and a maximum of divergence of 30.8% with Broad bean mottle virus localized in the 5'-UTR of RNA-3. This is the first sequence report of full-length BMV from the Czech Republic.

Scarceness of phytoseiid species co-occurrence (Acari: Phytoseiidae) on leafletsof Juglans regia

Jan Kabíček

Plant Protect. Sci., 2010, 46(2):79-82 | DOI: 10.17221/32/2009-PPS

In order to obtain information on the phytoseiid mite taxocoenoses, population density and frequency of occurrence on leaflets of Juglans regia, abandoned and uncultivated trees were sampled from July to August 2007. Eight phytoseiid mite species (Euseius finlandicus, Neoseiulella aceri, Neoseiulella tiliarum, Typhlodromus pyri, Typhlodromus cotoneastri, Phytoseius turiacus, Amblyseius andersoni, Paraseiulus triporus) were identified. Total phytoseiid population density averaged 1.4 mites per leaflet. The most abundant was Euseius finlandicus, and Neoseiulella aceri was the second most common species. The predominant presence of only one phytoseiid species per walnut leaflet was noted, but the co-occurrence of two species (mostly E. finlandicus with N. aceri) was also observed. The simultaneous occurrence of three phytoseiid species on a single leaflet was seldom detected and the cohabitation of more than three species per leaflet was not observed.

Soybean yield and yield component distribution across the main axis in response to light enrichment and shading under different densities

B. Liu, X.B. Liu, C. Wang, Y.S. Li, J. Jin, S.J. Herbert

Plant Soil Environ., 2010, 56(8):384-392 | DOI: 10.17221/189/2009-PSE

A 2-year field experiment was conducted under light enrichment and shading conditions to examine the responses of seed yield and yield components distribution across main axis in soybean. The results showed that the maximum increase in seed yield per plant by light enrichment occurred at 27 plants/m2, while the most significant reduction in seed yield per plant by shading occurred at 54 plants/m2. Light enrichment beginning at early flowering stage decreased seed size on average by 7% while shading increased seed size on average by 9% over densities and cultivars, resulting in a fewer extent compensation in seed yield decrement. Responses to light enrichment and shading occurred proportionately across the main axis node positions despite the differences in the time (15-20 days) of development of yield components between the high and low node positions. Variation intensity of seed size of three soybeans was dissimilar as a result of changes in the environment during the reproductive period. The small-seed cultivar had the greatest stability in single seed size across the main axis, followed by moderate-seed cultivar, while large-seed cultivar was the least stable. Although maximum seed size may be determined by genetic potential in soybean plants, our results suggested that seed size can still be modified by environmental conditions, and the impact can be expressed through some internal control moderating the final size of most seeds in main stem and in all pods. It indicates that, through redistributing the available resources across main stem to components, soybean plants showed the mechanism, in an attempt to maintain or improve yield in a constantly changing environment.

Chronic cannulation in the small intestine of feral pigeons (Columba livia) to assess bioavailability

J.G. Chediack, F.D. Cid, S.V. Fasulo, E. Caviedes-Vidal

Vet Med - Czech, 2010, 55(8):383-388 | DOI: 10.17221/2957-VETMED

We improved a method of chronic duodenal cannulation to study intestinal transport of solutes in an in vivo model (pigeon, Columba livia). A hypoallergenic cannula was inserted into the proximal part of the small intestine of pigeons and used for solution administration. Recovery from surgery was extremely rapid and animals started eating and drinking within a day. After surgery, the body mass of cannulated pigeons was stable, and no adverse effects in the weight could be detected. The method is simple, economical and useful to determine intestinal bioavailability of solutes, for nutritional and ecological studies, in intact animals without influence of anesthesia.

Effect of preventive application of Enterococcus faecium EF55 on intestinal mucosa during salmonellosis in chickens

R. Herich, T. Kokinčáková, A. Lauková, M. Levkutová

Czech J. Anim. Sci., 2010, 55(1):42-47 | DOI: 10.17221/19/2009-CJAS

In the present study the effect of preventive application of Enterococcus faecium EF 55 on the intestinal mucosa was evaluated in experimentally infected chickens with Salmonella enterica subsp. Enteritidis. A total of 120, one-day-old Salmonella-free chickens of Isa Brown hybrid were divided into 4 groups. The chickens in groups E and ES were perorally inoculated with E. faecium EF55 in a dose of 1 × 109 CFU/ml for 7 consecutive days. Placebo was applied to birds in control group C and group S during the first 7 days of life. At the age of 8 days chickens in groups ES and S were perorally infected with S. enterica subsp. Enteritidis phage type 4 in a dose of 1 × 108 CFU/ml. In birds treated with E. faecium EF 55 (group ES) a decreased number of Salmonella spp. positive individuals was recorded from 28.5% 2 days post infection (p.i.) to 10% 14 days p.i. when the difference between group ES and group with the application of Salmonella Enteritidis alone (group S) was significant (P < 0.01). On the contrary, in birds of group S the percentage of Salmonella spp. positive animals showed no constant changes. It increased from 12.5% 2 days p.i. to 37.5% 4 days p.i. The maximum of positive samples 83.3% was found 14 days p.i. The application of E. faecium EF55 reduced colonisation of caeca and minimized translocation of salmonellae into the liver and spleen. Two days p.i. the shortest villi in the jejunum were observed in group S - 1 266.2 µm, when compared to group E with the highest jejunal villi - 1 605 µm (P < 0.05). The growth of the villi was observed 14 days p.i. in all groups except group S. The early exposition of chickens to E. faecium EF55 led to more rapid development of intestinal villi when compared to the untreated control (P < 0.05). Reduced colonisation of the intestinal tract by salmonellae in birds treated with E. faecium EF 55 also preserved the microenvironment of the intestine from harmful effects of the pathogen.

 previous    ...   44   45   46   47   48  49   50   51   52   53   ...    next