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Mixolab versus Alveograph and Falling NumberGeorgiana Gabriela Codină, Silvia Mironeasa, Despina Bordei, Ana LeahuCzech J. Food Sci., 2010, 28(3):185-191 | DOI: 10.17221/169/2008-CJFS Recently, in 2005, a new method for monitoring the rheological properties of the dough on the entire technological process of bread making became available through Mixolab at an international level. This laboratory equipment has amazing possibilities for the research and development, enabling a complex analysis of flour. It allows the analysis of flour proteins quality (water absorption, stability, elasticity, weakening), the analysis of starch behaviour (gelatinisation, gelatinisation temperature, the modification of its consistency on additives addition) and the analysis of enzymatic activities (proteolytic, amylolytic). The objective of this study is to establish a relation between the alveograph, Falling Number, and Mixolab values. Sixty flours, collected around the Romanian country, were analysed simultaneously on alveograph (standard protocol), for the Falling Number, and on Mixolab ("Simulator" and the standard option "Chopin+" protocol). A selection of principal factors based on the Principal Component Analysis (PCA) was applied which allowed the building of an efficient predictive model for each parameter. There were significant correlations between most of the Alveograph parameters: maximum pressure (P), deformation energy (W), extensibility (L), alveograph ratio (P/L) and Simulator Mixolab stability. Using the Mixolab standard option "Chopin+" protocol a close association was found between some Mixolab parameters: stability and protein weakening (C2, difference of the points C1-C2 abbreviated C12) and the alveograph values (P, W). From the point of view of the correlations established with the Falling Number index, very good results were obtained with the parameters obtained with Mixolab that measures starch gelatinisation (C3, difference of the points C3-C2 abbreviated C32), amylolytic activity (C4, difference of the points C3-C4 abbreviated C34), and starch gelling (C5, difference of the points C5-C4 abbreviated C54). |
Obituary of Associate Professor RNDr. JOSEF ŠEDIVÝ, DrSc. (1925-2008)František KocourekPlant Protect. Sci., 2008, 44(3):119-120 | DOI: 10.17221/1266-PPS |
Soil biological activity of mulching and cut/harvested land set asideM. Růžková, L. Růžek, K. VoříšekPlant Soil Environ., 2008, 54(5):204-211 | DOI: 10.17221/396-PSE Formerly arable luvic chernozem set aside for ten years (1997-2006) with different herbaceous cover (grass, legumes and their mixtures) and agronomical practices (mulching and cut/harvesting) was studied. The experimental plot was maintained as black, spontaneous and controlled fallows from 1997 until July 2003 (BD period). In July 2003 the plots were desiccated by glyphosate herbicide and were run as a black fallow until August 2004 (AD). The last period (AG) was characterized by monoculture of Italian ryegrass cut/harvested twice a year until October 2006. The experimental soils were characterized with 18 parameters. Mulched plots in all periods (BD, AD and AG) were evaluated as highly microbial active plots. The black fallow (BD) permanently maintained by glyphosate herbicide was the lowest in biological parameters. The desiccation caused a highly significant increase (P < 0.01) of nitrates in topsoil, but in following period (AG) their significant decrease was detected. Desiccation enhanced carbon immobilization into microbial cells especially on mulched and cut/harvested sites (BD, AD). Due to mulching accumulation of soil organic matter highly significantly increased (P < 0.01). This induced a highly significant (P < 0.01) increase in the basal respiration (AD, AG) as the soil organic matter accumulated in the period BD was intensively mineralized. |
Index 2008editorsPlant Soil Environ., 2008, 54(12):I-V | DOI: 10.17221/430-PSE |
Models for evaluation of growth of performance tested bullsJ. Přibyl, H. Krejčová, J. Přibylova, I. Misztal, S. Tsuruta, N. MielenzCzech J. Anim. Sci., 2008, 53(2):45-54 | DOI: 10.17221/331-CJAS Before being used for insemination, young bulls of Czech Fleckvieh (CF) are tested for growth at performance-test stations. While at stations, the bulls are weighed monthly. Evaluation included 7 448 bulls with 82 676 records of weight measured from 6 to 520 days of life. In the station-year-period (HYS), which can be prolonged up to 3 months, different groups were tested according to the beginning of growth curve and according to test-days of weighing. Weight analyses were used to handle heterogeneous variability based on age. Legendre Polynomials (LP) with 5 parameters described the average growth curve for HYS classes. Deviations from average curves were decomposed into genetic (G), animal's permanent environment (PE) and residual (RES) components. Functions of (G) and (PE) were tested using LP random regression (RR) methodology with 5 or 3 parameters and Linear Spline (SP) function with 5 knots. Variance increases with the age of the animals. From 100 to 400 days, heritability was nearly the same with a mild depression in the middle of the period. The average was h2 = 0.31 and ended with h2 = 0.36. Results were similar for variance components, heritability, genetic, environmental and phenotype correlations from different models with different LP and SP functions. Higher RES variability occurred only for LP with 3 parameters. For traits like live weight, the RR should have at least 3 parameters and SP function should be used. |
Comparison of ovarian cycles of Hungarian riverine fish species representing different spawning strategies 441K.K. Lefler, Á. Hegyi, F. Baska, J. Gál, Á. Horváth, B. Urbányi, T. SzabóCzech J. Anim. Sci., 2008, 53(10):441-452 | DOI: 10.17221/352-CJAS Investigations on the ovarian cycle of fish species that inhabit Hungarian rivers are necessitated by both environmental and economic reasons. The objective of our research was to explore new fundamental knowledge concerning the ovarian cycle of the white bream (Blicca bjoerkna, Linnaeus, 1758), barbel (Barbus barbus, Linnaeus, 1758), orfe (Leuciscus idus, Linnaeus, 1758) and nase (Chondrostoma nasus, Linnaeus, 1758). Histological investigation of ovaries and determination of proportions of oocytes in different stages of development is an appropriate method for the description of spawning characteristics of these species. Our results show that the GSI value for all four investigated species starts to increase at the end of summer and reaches its maximum before spawning. In the barbel and white bream, the presence of oocytes in the stage of cortical alveoli and the heterogeneous size of oocytes in the stage of vitellogenesis in the pre-spawning period indicate that barbel and white bream are multiple spawners. In contrast, in the orfe and nase, the absence of oocytes in the stage of cortical alveoli and the homogeneous size of cells in the stage of vitellogenesis indicate that orfe and nase are single spawners. |
Influence of subsidies on the economic result of agricultural firms in production and marginal areasF. Střeleček, J. Lososová, P. KollarAgric. Econ. - Czech, 2003, 49(6):251-260 | DOI: 10.17221/5383-AGRICECON This article is divided into four parts: the first is concerned with the state subsidy and support policy in the year 2001. The second part of the contribution mentions the subsidy development in production and marginal areas in the period 1996-2001 and its influence on the economic result of an average farm. Another part monitors the grant volume and the economic result at a selective sample of the identical firms in the time period from of the year 1997 to the year 2001 in reference to the farm position. The last part will deal with an evaluation of the grant volume where the subsidies are divided according to the subsidy titles in the year 2001 in an average agricultural firm farming in a certain altitude. |
Internal environment of an agricultural farmD. KudováAgric. Econ. - Czech, 2008, 54(1):26-31 | DOI: 10.17221/253-AGRICECON Zemspol, Dešná, Ltd is a large corporation engaged in various aspects of agriculture in the Czech Republic, including agricultural production, the assembly, maintenance and repair of agricultural machinery, the production of feed stuffs and feed mixtures,special agricultural services demanding special entitlement, business related matters and accounting. This paper focuses on agricultural production. The farm manages 2 100 hectares of agricultural land suitable for growing potatoes, although the largest area is used for growing wheat. The range of produce remains constant. Regarding livestock, the corporation specializes in cattle with the steady head count 250 for the past 15 years. These are predominantly red and white cattle, optimized for both milk and meat production. The average annual production is 1 350 000 litres of milk and 250 tons of beef. The agricultural farm can be described as being a strong perfomer with a very stable base, good reputation and very attractive products, both of crops and livestock. In order to keep this enviable status, frequent internal and external environmental analyses are undertaken. |
Situation analysis of the external environment of a bakery companyH. Chládková, D. KudováAgric. Econ. - Czech, 2008, 54(7):301-306 | DOI: 10.17221/2706-AGRICECON The purpose of the situation analysis of the external environment is to find what is happening in the company environment now and in the future and how these factors will influence the activities and existence of the company. The paper deals with a situation analysis of the external environment of a specific company. This paper describes the external environment of the United Bakeries company using the STEPE analysis and in addition a situation analysis of the external environment was made. Next the probability estimation of the occurrence and influence of the factors is made for today, and for the near and long-term future. |
Marginalised groups of rural populationS. Buchta, Z. ŠtulrajterAgric. Econ. - Czech, 2008, 54(12):566-574 | DOI: 10.17221/285-AGRICECON The paper deals with the analysis of the typology of unemployed people in agriculture. Approximately 35-40% of people from this unemployment group have already no more chance to be reintegrated into the labour market. The analysis points to out the regional occurrence of this type of unemployment (less urbanised sub-mountain areas, stagnating and backward regions facing various processes of de-industrialisation, etc) and evaluates its wider socio-economic impacts. After 2000, the fragmentation of employment contracts in the corporative types of farms (agricultural co-operatives and companies) begins to appear in the agricultural sector. The category of seasonal agricultural workers with decreased labour and social protection begins to emerge as well. As a result of the strategy to cope with the situation, a certain self-supplying (subsistence farming) subculture was established in the Slovak rural areas to mitigate the difficult economic conditions of the rural households endangered by income deprivation, including the decreased purchasing power of rural population. |
Influence of packing method on colour perception improving the appearance of fruits and vegetablesB. Dobrzański, Jr., R. RybczyńskiRes. Agr. Eng., 2008, 54(2):97-103 | DOI: 10.17221/4/2008-RAE The appearance of fruits and vegetables has a major influence on the perceived quality. Therefore, colour is one of the most important quality parameters in consumers' preferences. Fruits differently exposed to the sun differ in colour, frequently looking unripe and reach full maturity just on handling or transport, some still green and appearing unripe. Oranges, carrot, red beet, and parsley were used for the study of the quality estimation. Different nets used for the packing of fruits were tested. The measurements of lightness and chromaticity parameters were performed according to L*a*b* system. The red net used for the packing of oranges caused a decrease of the lightness parameter L* for all stages of fruits maturity. However, some unripe and bright oranges, through the use of a red net, looked more mature. The chromaticity parameter a* is the most influential factor affecting the human perception of the fruit colour. The red net improves this parameter significantly, thus unripe yellow oranges become more saturated, changing the perception of colour to the predicted range. The colour is insignificant for the net, however, it is important for the classification and quality assessment by humans. |
Testing of lime tree (Tilia cordata Miller) clonesJ. Kobliha, M. Hajnala, V. JanečekJ. For. Sci., 2003, 49(12):559-574 | DOI: 10.17221/4725-JFS Previous experiences with breeding of lime tree (Tilia cordata Miller) in European countries are shown in this paper. The first results were obtained from the evaluation of juvenile planting of lime tree (Tilia cordata Miller) in the Czech Republic, founded in the School Forest Enterprise Kostelec nad Černými lesy. Lime tree clones (initially cultivated in vitro) were evaluated for growth parameters and also according to the growth form of the different clones. Individual clones were also checked for mortality. |
Impact of landuse on runoff in mountain catchments of different scalesOriginal PaperLadislav Holko, Zdeněk KostkaSoil & Water Res., 2008, 3(3):113-120 | DOI: 10.17221/16/2008-SWR The paper presents two approaches to the analysis of the impacts of landuse changes on hydrological regime in mountain catchments of northern Slovakia. An intersite comparison of measured data along the Jalovecký creek was used to test whether different landuse can be identified by means of water balance data and characteristics of runoff events. Although the comparison provided extended knowledge of the catchment, the only characteristic which might indicate possible impact of different landuse is the ratio of peakflow to flow at the beginning of the event. Simulations by means of spatially distributed hydrological model showed that different (extreme) scenarios resulted in relatively subtle impacts compared to uncertainties connected with hydrological modelling. |
Fine root growth of beech (Fagus sylvatica L.) seedlings during the first outplanting years in Western Bohemia (Czech Republic)M. Skrziszowski, I. KupkaJ. For. Sci., 2008, 54(5):212-215 | DOI: 10.17221/2901-JFS The study analyses the growth of beech seedling fine roots and their development in the first five years. The research plots were established in 1997-2003 in community forests of Starý Plzenec (Western Bohemia, Czech Republic). The data are based on annual reviews of beech samplings extracted from surveyed plots. The whole root volume as well as the fine root volume is significantly (on a 95% significance level) growing during the first years after outplanting and there is not any disruption of growth immediately after outplanting. |
Current state of beech bark necrotic disease in Southern PolandA. Cicák, I. MihálJ. For. Sci., 2008, 54(10):459-464 | DOI: 10.17221/47/2008-JFS The degree of the beech bark necrotic disease was evaluated in three selected localities in southern Poland, in different orographic complexes, Beskid Sądecki, Beskid Niski, and Bieszczady. The degree is expressed by means of the stem necrotising index (ISN ), crowns necrotising index (ICN ), and whole tree necrotising index (INWT ). The values of the indices laid in the following limits: ISN 0.73-0.84%, ICN 0.12%-0.51%, and INWT 0.84%-0.90%. The current status of the beech necrotic disease in Southern Poland can be considered as favourable. The values of ISN recorded in Southern Poland were lower by 30% than the average ISN for whole Slovakia. We also recorded the frequency of selected insect pests (Bucculatrix ulmella Zeller, Cryptococcus fagi Bärensp., and Ectoedemia liebwerdella Zimm.), which act in the beech stands as vectors of the necrotic disease. With C. fagi, we recorded a high frequency reaching even 100%. In contrast, we did not at all observe the occurrence of B. ulmella and E. liebwerdella, which are common in the beech stands in Slovakia, as well as in Hungary, Romania, and Bulgaria. In the localities studied, we recorded the occurrence of two species of parasitic fungi of the genus Nectria (Fr.) Fr. causing the beech bark necrotic disease, viz. Nectria cosmariospora Ces et De Not. and N. galligena Bres. ex Strasser. |
Tartrate-resistant acid phosphatase, matrix metalloproteinase-2 and tissue inhibitor metalloproteinase-2 in early stages of canine osteoarthritisH.B. Lee, M.R. Alam, J.W. Seol, N.S. KimVet Med - Czech, 2008, 53(4):214-220 | DOI: 10.17221/1921-VETMED The aim of this study was to determine if the activity of tartrate-resistant acid phosphatase (TRAP) in the synovial fluid (SF) and serum can be used as a marker for diagnosing the early stages of osteoarthritis (OA). We also wished to determine if identifiable differences in the concentrations of matrix metalloproteinase-2 (MMP-2) and tissue inhibitor of matrix metalloproteinase-2 (TIMP-2) could be detected in SF between normal joints and OA joints for the diagnosis of early OA. Ten skeletally mature beagle dogs underwent a unilateral surgical transection of the cranial cruciate ligament and medial meniscectomy. Five sham-operated beagle dogs were used as controls. The synovial fluid was collected in 1, 2 and 3 months and examined by western blotting for MMP-2 and ELISA for TIMP-2. The activity of TRAP in the SF and serum was measured using a spectrophotometer. In addition, the presence of TRAP positive cells in the synovium was identified by enzyme histochemistry. The level of the activity of TRAP and MMP-2 in the SF from the induced OA dogs was significantly higher than that of the control over a three-month period (P < 0.05). The TIMP-2 level in the SF was significantly lower in the induced OA dogs than in the control. However, there was no difference in TRAP activity in the serum. Histochemistry revealed a higher number of TRAP positive cells in the synovium from the induced OA dogs. Based on these data, we conclude that the activity of TRAP, MMP-2 and TIMP-2 in SF can be used as a biomarker to diagnose and monitor the early stages of OA. |
Necrotizing fasciitis caused by Serratia marcescens after tooth extraction in a Doberman Pinscher: a case reportT. Plavec, I. Zdovc, P. Juntes, T. Svara, S. Suhadolc Scholten, A. Nemec, A. Domanjko Petric, N. TozonVet Med - Czech, 2008, 53(11):629-635 | DOI: 10.17221/1863-VETMED : A 3-year-old Doberman Pinscher was referred to the Clinic for Small Animal Medicine and Surgery, Veterinary Faculty of Ljubljana for cardiologic examination due to lethargy, inappetence and lateral abdominal wall oedema. The dog had been treated at the primary veterinary practice for tooth granuloma two days before the presentation. During the course of the disease a presumptive diagnosis necrotizing fasciitis was ascertained and Serratia marcescens organism was isolated from the ventral body wall tissue, from the wound in the oral cavity and other organs in the body. Systemic signs developed concomitantly with the progression of the local disease. Due to grave prognosis the dog was euthanised. This is the first report of a necrotizing fasciitis in a dog caused by S. marcescens and also the first one suspected to occur after the dental procedure. |
The branching of the aortic arch in the Eurasian bittern (Botaurus stellaris, Linnaeus 1758)S. ErdoganVet Med - Czech, 2012, 57(5):239-244 | DOI: 10.17221/5954-VETMED This study was aimed at determining the vascular architecture of the aortic arch in the Eurasian bittern. For this purpose, the heart arteries of two bitterns were evaluated. The latex injection method was used to observe the branching of the aortic arch. Two brachiocephalic trunks were arising separately from the aortic arch and these arteries were giving to the common carotid and subclavian arteries. One of the thin branches arising from the subclavian artery was the sternoclavicular artery, which was in turn dividing into a sternal and a clavicular artery supplying the thoracic inlet and pectoral muscles. After the branching of the sternoclavicular artery, the axillary arteries were originating from the subclavian arteries. The thickest branch of the subclavian artery was the thoracic artery, which was dividing into internal and external thoracic arteries. Moreover, the brachiocephalic trunks were giving rise to the common carotid arteries and these were running cranially, giving rise to tracheosyringeal branches supplying the trachea and syrinx, thyroid artery, esophageal branches, artery of the comes nervi vagi and vertebral trunk. It is hoped that this study will enhance morphological data on exotic birds since the reports on species-specific vascular morphology in wild birds are insufficient and lacking in detail. |
Mechanical testing of orthopaedic suture material and a crimp clamp system for the extracapsular stabilisation of canine cruciate-deficient stiflesV. Ledecky, D. Knazovicky, M. Badida, L. Dulebova, M. Hluchy, S. HornakVet Med - Czech, 2012, 57(11):597-602 | DOI: 10.17221/6467-VETMED The cranial cruciate ligament (CCL) provides cranio-caudal stability, prevents hyperextension and constrains medial rotation of the tibia in the canine stifle joint and CCL rupture is the leading cause of hind leg lameness in dogs. Treatment of CCL rupture aims to resolve lameness caused by joint instability and provide good long-term function of the affected hind limb. The extracapsular technique is one of the most popular methods to restore joint stability. The technique involves a suture loop that is placed around the lateral fabella and through the tibial tuberosity. The ideal suture material should be strong, aseptic, easily handled, inexpensive, and provide excellent knot security and knot compactness. A critical property of the loop is the application of either a knot or crimp to maintain the tension on the loop. There is a variety of orthopaedic suture materials used for the extracapsular technique. Our aim was to compare the mechanical properties of four commercially available materials in pure tension. The materials tested were monofilament nylon leader (MNL) 100 lb, MNL 80 lb, Supramid and Silon. Our second objective was to compare the interoperator variability of applying either a knot or a crimp to secure the suture loop. Ultimate tensile strength was greatest with MNL 100 lb (373 N) followed by MNL 80 lb (285 N), Supramid (160 N) and Silon (103 N). Based on our results, we conclude that MNL 100 lb and MNL 80 lb are mechanically superior to Silon and Supramid. Our study also shows significant effects for the operator and method of loop fixation (P < 0.0001). Intraoperator differences were also found to be significant, for operator 1 (P < 0.0001), for operator 2 (P < 0.001) and operator 3 (P < 0.01). Our findings indicate that MNL is most suitable orthopaedic material and that loop fixation should remain the method of choice for surgeons treating CCL. |
Mining anatomical traits: a novel modelling approach for increased water use efficiency under drought conditions in plantsOriginal PaperManoj Kulkarni, Tushar Borse, Sushama ChaphalkarCzech J. Genet. Plant Breed., 2008, 44(1):11-21 | DOI: 10.17221/1330-CJGPB Crop yields are reduced by 70-80% due to a water stress situation specifically during the reproductive stage and are not able to fulfil the needs of food requirement in developed and developing countries of the world. Earlier work was mainly focused on the use of morphological or physiological and molecular aspects for improved stress tolerance. Efforts are being made to overcome this problem with the help of today's sophisticated and advanced technology through genomics, proteomics and metabolomics. The presented model summarizes our work in the last five years to mine anatomical parameters as a novel approach to further improving introgression or exploitation of stress adaptive traits. We have focused on some key anatomical traits playing a substantial role in water stress tolerance. This new conceptual model encompasses increased palisade mesophyll height, higher leaf strength index (LSI), higher number of conducting tissues with increased diameter in leaf, stem and root and controlled transpiration rate due to a lower number of stomata per unit leaf area along with the increased guard cell size. Different plants viz. Lycopersicon esculentum, Capsicum annuum, and Calotropis gigantea were screened by developing polyploids to validate this model approach. Genotypes of Vitis vinifera and Solanum melongena were also screened. Wild relatives like Lycopersicon esculentum var. cerasiforme and Solanum khasianum were evaluated for comparison. These observations were further correlated with various stress adaptation traits like yield under stress, in vitro screening, chlorophyll content, transpiration heating and cooling, molecular markers etc. A new scoring method is proposed which will be helpful to screen a large set of germplasms on a preliminary basis to discriminate genotypes for drought tolerance. There is an urgent need to study the genetics of these stress adaptive traits using high throughput molecular markers to make them more useful for a higher magnitude of genetic gain. |
Comparison of two mapping methods of potential distribution of pests under present and changed climateEva KOCMÁNKOVÁ, Miroslav TRNKA, Zdeněk ŽALUD, Daniela SEMERÁDOVÁ, Martin DUBROVSKÝ, František MUŠKA, Martin MOŽNÝPlant Protect. Sci., 2008, 44(2):49-56 | DOI: 10.17221/532-PPS The study compares two methods for modeling the potential distribution of pests when applied to the European corn borer (Ostrinia nubilalisHubner). The development of the European corn borer (ECB) is known to be closely correlated with daily air temperature as well as other climate variables. The climatic parameters are, therefore, used to predict the potential geographical distribution using tested tools such as CLIMEX or ECAMON. These models consider the climatic suitability of a given site/region for the pest's development and, thus, the possible establishment of a population at a given location. In this study, meteorological data from 1961 to 2000 and from 45 meteorological stations were used to characterise the current climate conditions in the Czech Republic. Validation was based on available field data of the occurrence of ECB in the same period. The climate parameters were later modified according to the estimates based on the combination of three SRES emission scenarios and three global circulation models. Under all climate change scenarios, we noted a marked shift of the pest's potential niches to higher altitudes, which might lead to an increase in the infestation pressure during the first half of this century. The present area of the univoltine population will increase due to temperature increases even above 800 m a.s.l. In addition there is a risk of the establishment of a bivoltine population in the main agricultural areas and 38% of arable land in the Czech Republic before 2050. |
Possible role of the soil in the sissoo forest (Dalbergia sissoo Roxb.) decline in the Nepal teraiS.P. Sah, C.K. Sharma, F. SchestedPlant Soil Environ., 2003, 49(8):378-385 | DOI: 10.17221/4140-PSE This paper deals with the recent sissoo (Dalbergia sissoo Roxb.) decline in the plain land (locally called as terai) of Nepal. This study has made an attempt to find the possible causal factor of this decline. The study has made some initiative in this aspect and has made a comparative study of 30 different sissoo forest (both natural and plantation) stands. The symptoms of the sissoo decline were found to be varied. But in most of cases, the top dying of crown was found to be the most prevalent. The top dying starts from the top of the tree and progressively proceeds downwards to the stem. The leaves become yellow. Until now, it has been assumed that only the plantation forests have been affected but this study observed the sissoo decline also in natural forest sites. We analysed various components of physical soil characteristics and we did not find any correlation between the physical soil factors and the sissoo decline. We concluded from this study that the soil is not the sole responsible factor involved in the sissoo decline Furthermore, this paper discusses various aspects of the sissoo decline and possible causal factors concerned. Finally, future management strategies regarding the sissoo management are suggested. |
Potentially dangerous fusarioid microorganisms associated with rot of hops (Humulus lupulus L.) plants in field cultureM. Gryndler, K. Krofta, H. Gryndlerová, L. Soukupová, H. Hršelová, J. GabrielPlant Soil Environ., 2008, 54(4):149-154 | DOI: 10.17221/387-PSE Several fusarioid microorganisms were isolated as potential pathogens of hop (Humulus lupulus L.) but their virulence was not proved in inoculation trials in field conditions. Molecular search for other possible pathogens was then performed. Using terminal restriction fragment length polymorphism (TRFLP), Gibberella pulicaris (anamorph: Fusarium sambucinum) was identified as a probable cause of the hop wilting. The primary cause of the disease is wounding of hop crowns by feeding of rosy rustic moth (Hydraecia micacea) caterpillars or by defect pruning and other unfavourable circumstances. The specific primer HLf1 was designed that can be used to detect the pathogen in soil and in damaged plant tissues. |
Enzyme activities of urban soils under different land use in the Shenzhen city, ChinaZ.J. Shi, Y. Lu, Z.G. Xu, S.L. FuPlant Soil Environ., 2008, 54(8):341-346 | DOI: 10.17221/415-PSE Urbanization has drastically changed soil properties, and an assessment of these changes is essential for soil management and soil health. The activities of urease, acid phosphatase, invertase and catalase, soil organic matter, pH, electrical conductivity (EC) and clay (< 0.01 mm) content of urban soils under two land-uses in the central built-up area of the Shenzhen city were investigated, and multivariate analysis was used to study the relationship between soil enzymes and soil physical-chemical properties. The results showed that invertase activity in roadside soil was significantly higher than that in urban park soil, whereas catalase activity was significantly higher in urban park soil. Soil organic matter had significant positive correlation with activities of invertase, urease and acid phosphatase but not with catalase. Soil pH had a significant negative direct effect on urease and acid phosphatase activity, but the effect was counteracted by positive indirect effect of soil organic matter. Soil EC had a positive direct effect on activities of catalase and there was a significant correlation between soil EC and soil catalase activities. Soil organic matter, soil pH and EC were the major factors influencing activities of soil enzymes. |
Effect of the stage of maturity on the leaf percentage of lucerne and the effect of additives on silage characteristicsY. Tyrolová, A. VýbornáCzech J. Anim. Sci., 2008, 53(8):329-334 | DOI: 10.17221/345-CJAS The first part of the study concerns the effect of the stage of maturity on nutrient content and leaf percentage of lucerne (Medicago sativa). The plants of lucerne were harvested and analysed at several stages of growth. The crop yield and changes in the concentration of nutrients were determined. The leaf percentage from whole herbage and leaf yield were determined as well. The leaf percentage at the growth stage of small buds was significantly (P < 0.05) higher than at the growth stage of bloom in all three cuts (1st cut 52.7% vs. 46.62%; 2nd cut 52.03% vs. 44.70%; 3rd cut 50.58% vs. 46.26%). Crude protein content of lucerne was decreased significantly (P < 0.05) from the large bud growth stage (small buds 219.6 g/kg DM and large buds 203.1 g/kg DM vs. bloom 173.5 and after bloom 154.2). In the second part of the study, the effect of silage additives on fermentation characteristics of lucerne was investigated. The bacterial inoculant (containing homo- and heterofermentative lactic acid bacteria), chemical additive (containing formic acid, propionic acid, ammonium formate and benzoic acid) and the bacterial inoculant with benzoic acid were used for the improvement of fermentation process.The addition of the inoculant with L. buchneri increased acetic acid (P < 0.05) concentration compared to the silage with chemical additive (group I with inoculant - 1.22%; group Ch with chemical additive - 0.84%; group ICh with chemical additive and inoculant - 1.43). Control silage (C) without additive contained 1.14% acetic acid in dry matter. |
World food problemV. JeníčekAgric. Econ. - Czech, 2003, 49(1):40-50 | DOI: 10.17221/5263-AGRICECON |
Relationships between humification and productivity in peat-based and peat-free growing mediaSz. Jakusné Sári, E. ForróHort. Sci. (Prague), 2008, 35(2):45-49 | DOI: 10.17221/638-HORTSCI Peat-based and peat-free (compost) materials were tested in a vegetable forcing experiment with Danubia green pepper (Capsicum annuum L.). Stability and quality of humic substances and the turnover of different nitrogen forms was determined in the studied media during the vegetation period. The main objective was to find how the degree of humification might influence the productivity of a crop under greenhouse conditions. The highest humus stability and humus stability coefficient values were detected in the green waste compost. Among different peat media, the low-moor peat was more humificated than the mixture of low-moor and high-moor peat. When the medium is more humificated it has a larger mobile nitrogen reserve. However, the structure stability decreases with the increasing humification. The mixture of two types of peat had the most favourable effect on nitrogen supply and the yield of pepper was the highest when grown on this medium. The nitrogen supplying ability of the examined compost was excellent but its structure stability deteriorated during the growing season. |
Conditions for the transformation of the MFIs from informal to formal typesK. SrnecAgric. Econ. - Czech, 2008, 54(5):202-208 | DOI: 10.17221/249-AGRICECON The article supplies the information concerning the transformation of informal MFIs to formal ones (Srnec, Havrland 2006). It underlines some risks of finance investors to the microfinancial segment of money market. Financial investors influence the possible development of MFIs and reverse. In contrary, MFIs can farcify or weaken the economic development in local areas and thus to decrease the financial effect and farm sustainable development. |
The impact of LFA payments on FADN farms in the Czech RepublicM. Štolbová, T. HlavsaAgric. Econ. - Czech, 2008, 54(10):489-497 | DOI: 10.17221/275-AGRICECON This paper analyses the impact of the LFA payments on farms economic results on the basis of the Farm Accountancy Data Network in the Czech Republic. Firstly, the approaches are compared to the structure of farms based on the LFA type. Secondly, the share of the LFA payments on economic results of farms is evaluated. The evaluation considers the LFA type, share of grassland, size of the eligible area of farms. Basic economic indicators are being monitored, such as Gross Farm Income, Farm Net Value Added, Family Farm Income, current subsidies, of which in particular the LFA payments. The share of the LFA payments in economic results of agricultural holdings is compared. As a result of the analysis, the winners and losers of the current system were defined. |
Contribution to the knowledge of Apodemus sylvaticus populations in forests of the managed landscape of southern Moravia (Czech Republic)J. SuchomelJ. For. Sci., 2008, 54(8):370-376 | DOI: 10.17221/33/2008-JFS The population dynamics of wood mouse (Apodemus sylvaticus) was studied in three forest complexes differing in food supply in the intensively managed landscape of southern Moravia. They included an old semi-natural floodplain forest dominated by oak (HL), production broadleaved forest with the predominance of oak and robinia (HA) and a pheasantry with various forest stands consisting of diverse species and age categories of trees with a quantity of additional food for additional feeding of pheasants and roe deer (RB). The population fluctuation within six-year monitoring was affected by seed years (acorn crops in 2003 and 2006), which resulted in an increase in the species population density in the next year. Statistically significant effects of the crop of acorns on the body weight of monitored species were also detected (P < 0.01, F = 1.44). Relative abundance differed significantly between the floodplain forest (HL) and RB and HA (P < 0.01). The two last-mentioned sites did not differ and only a trend of greater preference to the most variable biotope in RB was noted. It evidences the unsuitability of floodplain forest for the species. In spite of the food specialization in small seeds significant effects of the excess crop of acorns can result in a rapid increase in the Apodemus sylvaticus population which can then cause damage to the natural regeneration of oak or artificial regeneration by seeding although to a substantially smaller extent than the more harmful A. flavicollis. |
