Plant, Soil and Environment, 2004 (vol. 50), issue 10
The spatial variability of mineral nitrogen content in topsoil and subsoil
J. Haberle, M. Kroulík, P. Svoboda, J. Lipavský, J. Krejčová, D. Cerhanová
Plant Soil Environ., 2004, 50(10):425-433 | DOI: 10.17221/4054-PSE 
Spatial variability of soil mineral nitrogen Nmin (N-NH4+, N-NO3-) in a soil profile down to 60 cm was determined in a 19-ha experimental field in Prague-Ruzyně for four years. Winter wheat was grown in the years 2000 and 2001, oats in 2002 and mustard in 2003. Root length distribution and depth of the crops were determined at four locations representing different soil conditions within the experimental field. The coefficient of variation as the measure of the variability of nitrate N in topsoil and subsoil (0-30 and 30-60 cm, respectively) in the experimental years ranged between 18-39 and 20-37%,...
Development of wheat genotypes possessing a combination of leaf rust resistance genes Lr19 and Lr24
S. Šliková, E. Gregová, P. Bartoš, A. Hanzalová, M. Hudcovicová, J. Kraic
Plant Soil Environ., 2004, 50(10):434-438 | DOI: 10.17221/4055-PSE
Endopeptidase allele Ep-D1c and DNA marker-assisted selection have been used for the incorporation of Lr19 + Lr24 leaf rust resistance genes combination into adapted commercial winter wheat cultivars. The first step was the transfer of the gene Lr19 from the donor cultivar Agrus into acceptor cultivars Simona and Lívia. The progenies possessing the null allele Ep-D1c linked to the gene Lr19 have been screened for their resistance to leaf rust by isolate 4332 SaBa. The plants homozygous properties at the Ep-D1c locus and resistant against leaf rust were used for crossing with NIL...
Effect of drought stress on the formation of yield elements in spring barley and the potential of stress expression reduction by foliar application of fertilizers and growth stimulator
I. Svobodová, P. Míša
Plant Soil Environ., 2004, 50(10):439-446 | DOI: 10.17221/4056-PSE
Spring barley plants were exposed to water stress at different growth stages - from the period after emergence to the beginning of stem elongation, from emergence to the end of anthesis and from the beginning of stem elongation to the end of anthesis in pot experiments. In variants exposed to water deficit from emergence to the end of anthesis and from the beginning of stem elongation to the end of anthesis, effects of foliar fertilizers and Atonik preparation (applied before the growth stage DC 30 or at DC 33) to lower the stress impacts were tested. During the growing season, formation and reduction of tillers, florets per spike and the yield structure...
Effect of spring barley protection on the production of Fusarium spp. Mycotoxins in grain and malt using fungicides in field trials
M. Váňová, J. Hajšlová, P. Havlová, P. Matušinsky, K. Lancová, D. Spitzerová
Plant Soil Environ., 2004, 50(10):447-455 | DOI: 10.17221/4057-PSE
The effects of different fungicides in four-year trials with a susceptible variety of spring barley, which was grown in field conditions with two previous crops (sugar beet and corn) and artificially inoculated with spores of Fusarium, were investigated. Field trials were laid down in plots of the Agricultural Research Institute Kroměříž, Ltd. (235 m above sea level, average annual temperature 8.7°C, annual precipitation sum 599 mm) in 2000-2003. The variety Kompakt, which was very sensitive to Fusarium head blight (FHB) in other trials, was used in all the trials examined. Incidence and severity of FHB and control with fungicides were measured...
Callus induction and regeneration efficiency of spring barley cultivars registered in the Czech Republic
V. Šerhantová, J. Ehrenbergerová, L. Ohnoutková
Plant Soil Environ., 2004, 50(10):456-462 | DOI: 10.17221/4058-PSE
Immature zygotic embryos are frequently used for induction of cell cultures in vitro and for genetic transformation. The effect of three synthetic auxins: 2,4-dichlorophenoxyacetic acid (2,4-D), 3,6-dichloro-2-methoxybenzoic acid (dicamba) and 4-amino-3,5,6-trichloropicolinic acid (picloram) on induction and subsequent regeneration capacity of barley. In vitro culture was studied in 12 spring barley cultivars registered in the Czech Republic and a variety of Golden Promise, with known high regeneration efficiency. The callus formation frequency and number of green regenerants were influenced significantly both by genotype and auxin....
Effects of hydrogel amendment on water storage of sandy loam and loam soils and seedling growth of barley, wheat and chickpea
J. Akhter, K. Mahmood, K.A. Malik, A. Mardan, M. Ahmad, M.M. Iqbal
Plant Soil Environ., 2004, 50(10):463-469 | DOI: 10.17221/4059-PSE
The hydrogel amendments may improve seedling growth and establishment by increasing water retention capacity of soils and regulating the plants available water supplies, particularly under arid environments. The effects of different levels of a locally prepared hydrogel were studied on the moisture properties of sandy loam and loam soils (fine-loamy, mixed, hyperthermic Typic Haplargids, USDA, Luvic Yermosol, FAO) and on growth response of three plant species, viz. barley (Hordeum vulgare L.), wheat (Triticum aestivum L.) and chickpea (Cicer arietinum L.). Water absorption by gel was rapid and highest in distilled water and...