Fulltext search in archive



« advanced mode »

 previous    ...   151   152   153   154   155  156   157   158   159   160   ...    next 

Results 4621 to 4650 of 5716:

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.

Competition among agriculture and other sectors for water and land use: A case study of agricultural activity in the southern regions of Spain

A. Melián-Navarro, A. Ruiz-Canales

Agric. Econ. - Czech, 2008, 54(1):38-41 | DOI: 10.17221/255-AGRICECON

The southern area of the province of Alicante (Spain) embraces the regions Vega Baja del Segura (The Low Valley of The Segura River) and Bajo Vinalopó (Low Vinalopó) in the Valencian Community. Although both regions have a growing residential, touristy and industrial potential, agriculture is still an important activity here. In this study, a characterization of agricultural land distribution in the southern regions of Alicante is carried out, regarding the main crops where the most important current problems are irrigation water shortage and low harvest prices. Incomes received by farmers according to the level of harvest prices and the evolution of these prices in the last two years are studied. Besides, prices have been noticed to keep stable at the best. The evolution of land for different uses, mainly industrial, is also estimated. The competition for land and water use with other sectors has significantly increased the amount of land for these uses and what is more, it is still on increase.

Balancing of the chosen intangible fixed assets according to the Czech accounting legislation, German accounting systems and international accounting standards

P. Svoboda

Agric. Econ. - Czech, 2008, 54(7):314-321 | DOI: 10.17221/2708-AGRICECON

The paper deals with the comparison of intangible fixed assets, especially in the area of determination, evaluation as at the date of the accounting transaction, closing date and possibilities of depreciation according to the Czech accounting legislation, the selected German accounting systems and the international accounting standards IAS/IFRS and US GAAP. An analysis of the selected Czech firms with a varied structure of intangible fixed assets was also performed. The analysis proved that, in spite of the running IAS/IFRS and US GAAP convergence process, there are significant differences in this area, which limit the comparability of financial statements of accounting units. This paper is not concerned in detail with the preference limits and permits for greenhouse gases and intangible assets in acquisition.

Value production of poplar clones

R. Petráš, J. Mecko, V. Nociar

J. For. Sci., 2008, 54(6):237-244 | DOI: 10.17221/12/2008-JFS

The results of research on the value production of the stands of poplar clones Robusta and I-214 carried out in Slovakia are presented. Models of value yield tables were constructed separately for each clone. The models simulate gross and net financial yield of wood production in dependence on the site index and age of stand. They were constructed on the basis of the models of assortment yield tables, timber prices according to assortments and the models of own costs of timber felling and processing. The clone I-214 produces a faster and higher proportion of thicker assortments of average and below-average quality, and therefore it has the higher value production at a younger age only. Robusta produces smaller diameter but higher quality assortments and has the higher value production only at an older age. The site index of the stand is the most important factor in the value production of poplar clones. Differences in the production between site indexes are much greater than between the clones.

Architecture of root branches of Norway spruce trees (Picea abies [L.] Karst.) growing in gley soil

P. Štofko, M. Kodrík

J. For. Sci., 2008, 54(11):485-490 | DOI: 10.17221/55/2008-JFS

In the locality Hnilé Blatá (the High Tatras Mts.), the structure was measured of root branches in the windthrown spruces (Picea abies [L.] Karst.). After cleaning the root plates, the number, diameter, and length of individual root branches were measured. Individual root branches were classified into twelve diameter classes - according to their diameters measured in the middle of the root branch length. We found out a high frequency of the root branches in the first three root-diameter classes; the values of the average frequency of root branches smoothly declined with their diameters increasing. We found out the lowest mean values of the root branch length in the first two root diameter classes. However, the values of total average length of root branches were the highest in the first root diameter class and these values continually decreased with increasing values of the root branch diameter. On the basis of the high values of root frequency and of total root length in the thinnest root-diameter classes, it seems that the spruce trees growing in gley soil form a similar root structure as those growing in podzolic brown soil.

Content of trans-resveratrol in leaves and berries of interspecific grapevine (Vitis sp.) varieties

Petra Bábíková, Naděžda Vrchotová, Jan Tříska, Marie Kyseláková

Czech J. Food Sci., 2008, 26(10):S13-S17 | DOI: 10.17221/238/2008-CJFS

The aim of this project was to study changes in the content of trans-resveratrol in berries and leaves of grapevine (Vitis sp.) infested by fungal diseases, especially by Botryotinia fuckeliana Whetzel, called as grey mildew, Plasmopara viticola (Berk. & M.A. Curtis) Berl & De Toni, called downy mildew and Uncinula necator (Schw.) Burr, called powdery mildew. In our experiments two white and two blue varieties were used. Contents of trans-resveratrol were determined in healthy and infested leaves and in healthy berries. Infested leaves of white varieties contained more trans-resveratrol than those of blue varieties. The content of trans-resveratrol in berries was lower than that in leaves.

Effect of 1B/1R Translocation on Selected Grain Quality Parameters in a Set of Doubled Haploid Wheat Lines

Václav Dvořáček, Jana Bradová, Zdeněk Stehno

Czech J. Genet. Plant Breed., 2006, 42(2):50-57 | DOI: 10.17221/3654-CJGPB

A set of quality parameters (crude protein content, Zeleny sedimentation test, wet gluten content, gluten index, albumins + globulins content, gliadin content, sum of glutenins, proportion of albumins + globulins in crude protein and relative viscosity) was tested in 17 doubled haploid (DH) wheat lines differing in the presence or absence of 1B/1R translocation. The presence of 1B/1R translocation (allele Gli 1B3) affected the significantly higher content of albumins and globulins and significantly lower value of gluten index. Nevertheless, a certain translocation influence on the other parameters (Zeleny sedimentation test; relative viscosity; proportion of albumins + globulins in crude protein) was also registered. The deteriorative effect of the 1B/1R translocation on indirect technological grain parameters was confirmed more markedly in gluten index than in Zeleny sedimentation test. A high number of significant differences between lines was found in Zeleny sedimentation test, content of glutenin, content of albumins + globulins and their proportion in crude protein. In spite of lower variability between lines relative viscosity showed a high dependence on genotype and was indifferent to the other quality parameters.

Bacterial D-alanine concentrations as a marker of bacterial nitrogen in the gastrointestinal tract of pigs and cows

U. Schoenhusen, J. Voigt, U. Hennig, S. Kuhla, R. Zitnan, W.-B. Souffrant

Vet Med - Czech, 2008, 53(4):184-192 | DOI: 10.17221/1922-VETMED

D-alanine (DAL) has been successfully used as a marker of bacterial nitrogen (N) in the small intestine of cows. This study compares DAL contents of intestinal bacteria in digesta of cows and pigs with respect to diet and sampling site. In isolated ileal bacteria of pigs a DAL/N ratio (41.72 ± 3.19 mg/g, n = 18) was found, which was not different from that in rumen bacteria (40.11 ± 1.95 mg/g, n = 18) but higher than in duodenal bacteria of cows (38.09 ± 2.09 mg/g, n = 18, P < 0.001). The DAL/N ratio in ileal bacteria of pigs was independent of the diet (P = 0.38) but it tended to be affected by the animal (P = 0.095). In bacterial preparations derived from cows, the DAL/N ratio depended on the diet (P = 0.04) and the site of sampling (P = 0.004). Our findings indicate that a general value for DAL/N ratio in pig or cow intestinal contents to calculate bacterial N should not be used.

Current and emerging assays for Francisella tularensis detection: a review

M. Pohanka, M. Hubalek, V. Neubauerova, A. Macela, M. Faldyna, H. Bandouchova, J. Pikula

Vet Med - Czech, 2008, 53(11):585-594 | DOI: 10.17221/1862-VETMED

This paper presents an overview of methods for detection and identification of the pathogenic bacterium Francisella tularensis such as cultivation tests, enzyme-linked immunosorbent assays, flow cytometry, polymerase chain reaction, immunosensor, microarray, mass spectrometry, and chromatography. Included references are chosen according to their practical importance or perspectives for the future.

Predicting individual phenological phases in peaches using meteorological data

T. Litschmann, I. Oukropec, B. Křižan

Hort. Sci. (Prague), 2008, 35(2):65-71 | DOI: 10.17221/640-HORTSCI

The submitted work deals with the relation between the sum of active temperatures above 7°C and important phenological phases in peach tree cultivation. The aim of the paper is to provide information for growers, especially regarding anticipated harvest dates, which is important for marketing. Data has been compiled for the period 1998-2007 for the variety Catherine, grown in the locality of Velké Bílovice in the Czech Republic. A relationship between the sum of active temperatures above 7°C from the beginning of the year up to the start of blossoming has been identified, and a model determining the harvest date on the basis of the sum of active temperatures in the periods of 30 days and 60 days after blossoming has been tested.

Effects of organic and mineral fertilisers on biological properties of soil under seminatural grassland

Ľ. Ondrášek, J. Čunderlík

Plant Soil Environ., 2008, 54(8):329-335 | DOI: 10.17221/416-PSE

Over 2004-2006, effects of mineral fertilisers (60 N + 30 P + 60 K kg/ha or 120 N + 30 P + 60 K kg/ha) and farmyard manure (12 or 24 t/ha) application on biological and chemical properties of soil were studied in seminatural grassland. The research trial was established at Radvaň site, central Slovakia (altitude 480 m, loamy to sandy-loamy Cambisol). These parameters were investigated during the growing seasons: CO2 production, intensity of total N mineralisation (TMN), the rate of nitrification (NIT), total C content in microbial biomass (MB-C), Cox, Nt, P, K, Mg and the humic acids to fulvic acids ratio (HA:FA). At the application of mineral fertilisers, the highest N rate significantly increased TMN and NIT, mainly in 2004 and 2005. The manure application showed the strongest effects on the biological parameters. The manure rate of 12 t/ha significantly increased the soil respiration in 2005 and 2006 as well as TMN and NIT throughout the research. The manure application increased also the soil pH, MB-C, Nt, Mg, P and Cox.

All-human social, humanitarian, cultural and security problems of the world

V. Jeníček, V. Krepl

Agric. Econ. - Czech, 2008, 54(6):263-268 | DOI: 10.17221/281-AGRICECON

The common denominator of all rather different names and understandings of it (the problem of the "model of man and society development", problem of the "lack of the civilisation concept" etc.) is that there is no clear understanding regarding the question of the perspective approach (or approaches), the relevant basic development trends of humankind in the material as well as non-material sphere, i.e. in the basic question of many philosophers "Who are we, whence and where are we going". We mention only some of the problems, which are at present directly connected to the "problem of the future of man". These are the problems from the sphere of all-human social, ethical, humanitarian and cultural aspects of the human civilisation development, which are today (but need not be already in the near future) in the centre of attention: the problem of social inequality extension, the problem of spreading epidemics and drug abuse, the problem of the uncontrollable migration and city agglomerations growth, the problem of terrorism.

Relationships between the HMW- and LMW-glutenin subunits and SDS-sedimentation volume in Spanish hulled wheat linesShort Communication

Leonor Caballero, Luis M. Martín, Juan B. Alvarez

Czech J. Genet. Plant Breed., 2008, 44(3):114-117 | DOI: 10.17221/8/2008-CJGPB

Emmer and spelt are two hulled wheats that were widely grown in Spain until the latter 1960s. Twenty-nine emmer and twenty-six spelt lines obtained from Spanish accessions of these hulled wheats were analysed for quality traits and endosperm storage protein composition. The results showed a wide range of variability in these traits. Likewise, a certain association between some alleles of these proteins and the SDS-sedimentation volume has been detected.

Bailey M.J., Lilley A.K., Timms-Wilson T.M., Spencer-Phillips P.T.N. (eds) - Microbial Ecology of Aerial Plant Surfaces - Book review

Aleš Lebeda, Barbora Mieslerová

Plant Protect. Sci., 2008, 44(2):75-76 | DOI: 10.17221/17/2008-PPS

Permanent jugular catheterization in miniature pig: treatment, clinical and pathological observatio

D. Usvald, J. Hlucilova, J. Strnadel, R. Prochazka, J. Motlik, M. Marsala

Vet Med - Czech, 2008, 53(7):365-372 | DOI: 10.17221/1992-VETMED

The aim of present study was the installation of permanent jugular catheter to miniature pigs, which are frequently used as animal model for the experiments closely related to human medicine. We describe here in many details surgical interventions leading to the localization and fixation of Seldinger needle in ν. jugularis externa and its use for extended period of time. Eight animals were included in these experiments and their heath status was currently monitored and no visible problems were recorded. After two months they were euthanased and potential function of catheters was carefully inspected. Only in two instances we found pathological changes resulting in the obstruction of catheter and trombophlebitis of ν.jugularis externa sin and ν. cava cranialis In six remaining animals, it was easy to inject any time the solutions with drugs to blood system or to take safely blood samples. During whole post operation period the animals were maintained in conventional conditions, without any special care.

The effects of space allowance on egg yield, egg quality and plumage condition of laying hens in battery cages

M. Sarica, S. Boga, U.S. Yamak

Czech J. Anim. Sci., 2008, 53(8):345-353 | DOI: 10.17221/349-CJAS

This study was conducted to investigate the effects of cage stocking density on egg yield, some egg quality traits and plumage condition in laying hens. Eighteen weeks-old 264 ISA-Brown pullets were divided into four cage density groups. The densities were 2 000, 1 000, 667 and 500 cm2 per hen (by allocating 1, 2, 3 and 4 hens per cage; floor area 40 × 50 cm) with 48, 30, 24 and 21 replicate cages, totally 123 three-tier battery cages. During the experimental period from 18 to 53 weeks of age, all birds were provided illumination for 16 hours a day. The hens were fed a diet containing 11.7 MJ ME/kg and 180 g CP during the period of 18 to 40 weeks of age and 11.3 MJ ME/kg and 170 g CP during the period of 41 to 54 weeks of age. Feed and water were available for ad libitum. Egg yield, mortality, live weights at 50% egg production age and at the end of experiment, pecking related mortalities, some egg quality traits and plumage condition were recorded weekly. Hen-housed egg production, egg mass, viability, and live weights were significantly decreased by higher densities. Most of the egg quality traits were not affected by cage densities. Pecking related mortalities increased in cage densities of 667 cm2 and 500 cm2 per hen compared to the other densities (P < 0.05) while plumage scores were higher in all body parts of hens kept in cages of 2 000 cm2 and 1 000 cm2 densities compared to the higher densities. The results showed that brown laying hens should be kept in cages having 1 000-2 000 cm2 densities in order to improve their welfare and performance.

Lactic acid fermented vegetable juices

J. Karovičová, Z. Kohajdová

Hort. Sci. (Prague), 2003, 30(4):152-158 | DOI: 10.17221/3878-HORTSCI

Vegetable juices processed by lactic acid fermentation bring about a change in the beverage assortment for their high nutritive value, high content of vitamins and minerals. Starter cultures of the genus Lactobacillus are added into juices to achieve their desirable properties. This review describes the manufacture of lactic acid fermented vegetable juices and beneficial effects of the lactic acid bacteria (mainly antimicrobial and anticancer effects). A separate part of research is devoted to nutrition aspects of lactic acid fermentation and to the occurrence of biogenic amines in lactic acid fermented vegetables and vegetable juices.

Euro: the engine of integration or the seed of dissolution?

A. Rusek

Agric. Econ. - Czech, 2008, 54(4):137-149 | DOI: 10.17221/290-AGRICECON

The common currency Euro is considered one of the biggest achievements of the European political and economic integration. However, it is necessary to stress that Euro was always first and foremost a political feat. Economists by and large pointed out that the EU - even in its 1992 reincarnation - is not an optimum common currency area (OCA). But politicians and some economists hoped that the existence of Euro itself may accelerate the processes toward the OCA. However, this did not happen and the divergence processes inside the Eurozone accelerated after 1999. Today, the Eurozone stands near the crossroad - where some countries may be increasingly tempted to leave.

Barriers to the entry into the fruit producing industry in the Czech Republic

D. Kudová, H. Chládková

Agric. Econ. - Czech, 2008, 54(9):413-418 | DOI: 10.17221/2700-AGRICECON

The contribution is focused on the analysis of barriers to the entry into fruit production. The branch is identified as a fruit growers branch and the threat to new entries in the branch will concern especially the establishment of a new firm or the expansion of an existing firm's plant production by some fruit species production. The methodology is based on the Porter model of competitive forces in the industry. In fruit production, there have been analysed the following entry barriers: economies of scale, differentiations, capital intensity, transfer, access to distribution channels, cost disadvantage independent of scale, government policy, anticipated retaliatory measures from existing firms. The analysis proves that the barriers to enter the fruit production are rather high nowadays, which should discourage the potential new firms from entering this branch.

A survey of forest pollution with heavy metals in the Natural Forest Region (NFR) Moravskoslezské Beskydy with particular attention to Jablunkov Pass

P. Fiala, D. Reininger, T. Samek

J. For. Sci., 2008, 54(2):64-72 | DOI: 10.17221/796-JFS

A survey of forest nutrition was carried out in Natural Forest Region (NFR) No. 40 Moravskoslezské Beskydy. The reason for this survey was the gradually worsening state of forest stands in this region and especially in a part of it - in the Jablunkov Pass. Air pollution was the suspected cause of the unfavourable development. According to methodology established for the survey of forest nutrition, the samples of soil and assimilatory organs were collected at 375 sampling sites. The spatial distinctness of Jablunkov Pass was expressed on the basis of selected soil characteristics (quantity of organic material, exchangeable pH, content of total nitrogen, zinc, lead, chromium, cadmium) and of the contents of chemical elements (total nitrogen, magnesium, zinc, lead, chromium, cadmium) in two-years-old Norway spruce needles. These analyses were done by the software Statistica. The medians of concentrations of elements in two-years-old Norway spruce needles in the area of NFR except Jablunkov Pass are: Zn - 34, Pb - 0.71, Cd - 0.15 and Cr - 0.38 (mg/kg). In the area of Jablunkov Pass: Zn - 43, Pb - 12.1, Cd - 0.25 and Cr - 0.41 (mg/kg). Particular attention was paid to the content of heavy metals both in the whole area of NFR and in the area of Jablunkov Pass particularly. The spatial homogeneity is disturbed by the influence of air pollution there. Markedly higher contents of zinc, lead and cadmium are found in the whole soil profile, in the case of chromium in the forest floor only. The distribution of heavy metal contents in the soil profile is influenced by the quantity and quality of organic matter and by the altitude of sampling sites. The higher values of medians of zinc, lead and cadmium contents are found in the area of the Pass. Chromium is an exception with the highest contents found in the southern part of NFR. The medians of concentrations of elements in the forest floor of Norway spruce stands in the area of NFR except Jablunkov Pass are: Zn - 70.6, Pb - 88.6, Cd - 6.4 and Cr - 0.69 (mg/kg). In the area of Jablunkov Pass: Zn - 103, Pb - 138, Cd - 8.8 and Cr - 1.02 (mg/kg). The spatial distinctness of the area around the Jablunkov Pass is confirmed by the evaluation of the data of forest nutrition survey. Particularly, it consists in the high contents of phytotoxic heavy metals. The exceptionally high pollution of this area can be a cause of the physiological weakness of trees with following attack of the honey fungus.

Assessment of genetic diversity of yellow-seeded rapeseed (Brassica napus L.) accessions by AFLP markers

Chengyu YU, Leona Leišová, Vratislav Kučera, Miroslava Vyvadilová, Jaroslava Ovesná, Ladislav Dotlačil, Shengwu HU

Czech J. Genet. Plant Breed., 2007, 43(3):105-112 | DOI: 10.17221/2071-CJGPB

The genetic diversity of 35 yellow-seeded Brassica napus L. accessions originating from China, Czech Republic and Poland was assessed by means of Amplified Fragment Length Polymorphism (AFLP) markers based on multiplex PCR using multi-colour fluorescent-labelled primers. Five brown-seeded accessions originating from China and France were selected as outliers. In total, 632 peaks were generated by AFLP reaction using 18 primer combinations. Only distinctly polymorphic markers among them were scored. In total, 242 polymorphic markers were detected with an average of 13.4 markers per primer combination. The AFLP analysis separated forty studied accessions into Chinese and European groups by UPGMA clustering and Principal Coordinates Analysis (PCA). The grouping of accessions based on the cluster analysis and PCA was generally consistent with known pedigree information and geographic origin. Notable geographical divergence was found between Chinese and European yellow-seeded accessions. This information is useful for yellow-seeded hybrid breeding and encouraging breeders to exchange their germplasm as to enlarge the genetic diversity of breeding accessions.

Evaluation of virulence of Fusarium solani isolates on pea

Michal Ondřej, Radmila Dostálová, Rudolf Trojan

Plant Protect. Sci., 2008, 44(1):9-18 | DOI: 10.17221/519-PPS

The virulence of 166 Fusarium solani isolates collected in the Czech Republic from infected pea plants was evaluated. Based on the ability to produce phytotoxic naphtarazin (DHF - dihydrofusarubin), only two isolates from this collection (designated FS VG and FS We) corresponded with the characteristics of f.sp. pisi. Suitability and effectiveness of two methods of inoculation based on soaking of seed in the inoculum were evaluated. The possibility to use mixtures of inocula of different species (F. solani f.sp. pisi + F. oxysporum f.sp. pisi races 1 and 2) and of mixtures of two isolates with different virulences was explored. Employing an efficient testing method and the most virulent isolate FS VG, 184 semileafless types of field peas and garden peas were screened to find accessions with a higher level of resistance to F. solani f.sp. pisi.

Unusual fatal avian polyomavirus infection in nestling cockatiels (Nymphicus hollandicus) detected by nested polymerase chain reaction

O. Tomasek, O. Kubicek, V. Tukac

Vet Med - Czech, 2007, 52(5):193-201 | DOI: 10.17221/2002-VETMED

High mortality of nestling cockatiels (Nymphicus hollandicus) was observed in one breeding flock in Slovakia. The nestling mortality affected 50% of all breeding pairs. In general, all the nestlings in affected nests died. Death occurred suddenly in 4- to 6-day-old birds, most of which had full crops. No feather disorders were diagnosed in this flock. Two dead nestlings were tested by nested PCR for the presence of avian polyomavirus (APV) and Chlamydophila psittaci and by single-round PCR for the presence of beak and feather disease virus (BFDV). After the breeding season ended, a breeding pair of cockatiels together with their young one and a fledgling budgerigar (Melopsittacus undulatus) were examined. No clinical alterations were observed in these birds. Haemorrhages in the proventriculus and irregular foci of yellow liver discoloration were found during necropsy in the young cockatiel and the fledgling budgerigar. Microscopy revealed liver necroses and acute haemolysis in the young cockatiel and confluent liver necroses and heart and kidney haemorrhages in the budgerigar. Two dead cockatiel nestlings, the young cockatiel and the fledgling budgerigar were tested positive for APV, while the cockatiel adults were negative. The presence of BFDV or Chlamydophila psittaci DNA was detected in none of the birds. The specificity of PCR was confirmed by the sequencing of PCR products amplified from the samples from the young cockatiel and the fledgling budgerigar. The sequences showed 99.6-100% homology with the previously reported sequences. To our knowledge, this is the first report of APV infection which caused a fatal disease in parent-raised cockatiel nestlings and merely subclinical infection in budgerigar nestlings.

The effect of different rates and forms of applied sulphur on nutrient composition of planted crops

M. Skwierawska, L. Zawartka, B. Zawadzki

Plant Soil Environ., 2008, 54(5):179-189 | DOI: 10.17221/398-PSE

A three-year field experiment was conducted from 2000 to 2002 in North-East Poland. Each year three sulphur fertilization rates in the form of sulphate (S- SO42-) and pure sulphur (S-S0) were applied: 40, 80 and 120 kg/ha. The most beneficial effect on the yields of cabbage, onion and barley was produced by the rates of 40 and 80 kg S/ha, while the dose of 120 kg S/ha (especially when applied as S-SO42-) reduced the yields of these crops. Increasing rates of sulphur used as a fertilizer caused increased concentration of sulphates in plants up to their luxury accumulation. Irrespective of the test crop species or form of sulphur applied, once the crops terminated their vegetative season, the plants fertilized with sulphur typically contained more total N than those fertilized only with NPK. The S-SO42- fertilization tended to raise the accumulation of N-NO3- in the crops, especially during the juvenile phase. The application of 120 kg S-SO42-) /kg caused depressed amounts of potassium in cabbage, onion and in barley during the heading phase.

Resistance of Chinese asters (Callistephus chinensis Nees.) to Fusarium wilts (Fusarium oxysporum f. sp. callistephi (Beach) Snyder and Hansen) evaluated using artificial inoculations

T. Nečas, F. Kobza

Hort. Sci. (Prague), 2008, 35(4):151-161 | DOI: 10.17221/656-HORTSCI

The resistance of Chinese asters to Fusarium wilt was tested by artificially inoculating the root systems. A mixture of Fusarium isolates was prepared with a concentration of about 104-109 propagules per litre of the pathogen. 63 cultivars of both domestic and foreign origin were evaluated in the 1st year, 95 in the 2nd year and 89 in the 3rd year. Clear, statistically valid differences in mortality, both with experiments involving artificial inoculations and considering natural infections, make it possible to divide aster varieties into three groups based in their resistance to infections. The first set can be described as resistant. This includes the Matsumoto, Einf. Madeleine and Americká kráska series, and several others. The second set can be described as being moderately resistant. This includes the Chryzantémokvěté and Standy series, and the cultivars Matsumoto Pink, Princes Armida and Jitka. The third set can be described as sensitive. This includes the Průhonický trpaslík, Jehlicovité and Pastel series and several others. A statistical analysis of the results shows that the Einf. Madeleine series of cultivars is the most resistant to Fusarium wilt. This series is phenotypically similar to the original botanical species. Resistance was evaluated by recording the differences in mortality rates between artificially-inoculated plants and non-inoculated group (controls).

Biogeochemical effect of karst soil on the element contents in the leaves of two species of Flos Lonicerae

Q. Li, J. Cao, L. Yu

Plant Soil Environ., 2008, 54(11):486-492 | DOI: 10.17221/433-PSE

In order to study the characteristics of element values in the cell of plants and soils and their relationships that would help to evaluate the biogeochemical effect of soil on the element contents in the cells of plants in the same environment of Southwestern China, the soil samples were collected for analysis and the weight and atom percentage of elements (WT% and AT%) in the leaves of two different species of Flos Lonicerae were analyzed by the electron probe (EDX-9100). The results of soil analysis show that the nutrient element contents in the soil are determined by the liable content of elements, which were arranged as: Ca > Mg > Cu > Mn > K > Na > P > B > SiO2 > Zn > Fe, even though the total element values in soil of different horizons were arranged as: SiO2 > Fe > Ca > Mg > K > Na > Mn > P > Zn > B > Cu. It indicates that karst environment is composed of soluble calcium-rich rock and soil scarcity. Moreover, the migratory velocity and availability of elements are also determined by their coefficient variability. According to statistical results, Ca, Mn and P in the soil have high coefficient variability, reflecting its background of karst soil. Based on the electron probe, it is shown that the content of Ca is higher while Mg is the lowest in the cell of two different species of Flos Lonicerae (r = -0.156, P < 0.05) and the content of P in the cell is inferior to Ca (r = 0.868, P < 0.01). By studying the relationship of soil and the plants, it can be seen that these results are probably caused by the characteristics of local biogeochemistry. Ca is mainly absorbed by plant with the help of transpiration and accumulated in the cell, and thus becomes a predominant element in the cell. The accumulation of Ca in cell of plant will affect the absorbency and the content of other elements in the cell of Flos Lonicerae, resulting in the different contents of other elements in the Flos Lonicerae through synergistic and antagonistic action, followed by the affected quality and officinal value of the Flos Lonicerae.

Human resources development in rural areas of the Czech Republic

L. Svatošová

Agric. Econ. - Czech, 2008, 54(2):71-76 | DOI: 10.17221/268-AGRICECON

Regional development strategy has to be designed with knowledge of human resources' development trends. Monitoring of this factor is of concern namely in rural areas where disfavourable demographic situation may occur. Leaving this problem unsolved would constitute depopulation of certain endangered regions. The paper is focused on analysis of human resources' condition and development granding groups of settlements by size.

Information systems in the adaptation process of the Euro currency in Slovakia

M. Kučera, M. Fiľa, A. Látečková

Agric. Econ. - Czech, 2008, 54(8):352-357 | DOI: 10.17221/301-AGRICECON

On the 1st of January 2009, the Slovak Republic should implement the Euro currency and enter the European Monetary Union. The implementation of the Euro currency is in currently the most important theme in our country. Business companies will benefit most, but they will also bear most of the single-shot costs. Up to 80% of the costs are constituted by the adaptation of information systems (IS). At the end of the year 2007, only 14% of Slovak companies were prepared in the terms of the Euro adaptation in IS. This condition of the business sector is very important and also alarming. Accelerated preparations of the changes in IS are needful, but this project is highly complicated, primarily in big business organizations. The quality of the realized project and the continuous transmission of IS will be a critical point of the firm success on the Slovak and European markets.

Index of Agricultural Economics (Volume 54) Authors Index of Agricultural EconomicsIndex

editors

Agric. Econ. - Czech, 2008, 54(12):X1 | DOI: 10.17221/288-AGRICECON

Biological activity, nitrogen dynamics, and chemical characteristics of forest soils in the Šumava national park

M. Svoboda

J. For. Sci., 2003, 49(7):302-312 | DOI: 10.17221/4704-JFS

This paper deals with large-scale mountain forest decline in the Šumava National Park. The changes in biotic and abiotic properties of forest sites follow the tree layer disintegration. Changed microclimatic conditions such as intensity of irradiance, moisture and temperature of the top holorganic layers together with altered development of ground vegetation could strongly affect the values of microbiological respiration activity and the rates of nitrogen mineralization and nitrification. Soil substrates, built of organic mater, located on stony locations, are endangered by introskeletal erosion. This paper compares these features in pairs of research plots, consisting of dead or cut forest and of living stand. According to the results of this study, higher rates of organic matter decomposition, transformed dynamics of nitrogen and other nutrients and possible nutrient leaching from soil solutions were demonstrated in the forest floor under declined spruce stands. The extent and seriousness of these adverse processes for forest soils are strongly site dependent.

 previous    ...   151   152   153   154   155  156   157   158   159   160   ...    next