Plant, Soil and Environment, 2004 (vol. 50), issue 11
Effect of cadmium on polyphenol content in young barley plants (Hordeum vulgare L.)
J. Dudjak, J. Lachman, D. Miholová, D. Kolihová, V. Pivec
Plant Soil Environ., 2004, 50(11):471-477 | DOI: 10.17221/4060-PSE 
The effect of abiotic stress caused by cadmium on the total polyphenols content in root, shoots and leaf blades of barley was investigated in model experiments. Total polyphenols content was determined spectrophotometrically with Folin Ciocalteau's reagent, Cd content by atomic absorption spectrometry (AAS) in 28-day-old plants. Treatment of the barley plants with Cd (1.10-6 mol/l) in a nutrition solution caused the increase in the total polyphenols in all parts of the plant. The highest increase was found in the leaf blades (35.2%, 8340 mg/kg d.m.), a lesser increase found in the shoots (16.7%, 3590 mg/kg d.m.), and the lowest increase...
Simulation of hydrological balance on experimental catchments Všeminka and Dřevnice in the extreme periods 1992 and 1997
P. Kovář, P. Cudlín, J. Šafář
Plant Soil Environ., 2004, 50(11):478-483 | DOI: 10.17221/4061-PSE
Hydrological research on the Všeminka and Dřevnice experimental catchments has been carried out for almost ten years. Earlier analyses on these catchments have provided many partial results in the assessment of land use on water regime and also some analysis of extreme hydrological event conditions. This paper gives attention to identification of extreme hydrological periods (i.e floods and droughts) and to the simulation of events when these catchments are in that time impacted by the torrential rainfall of design character with the periodicity P = 0.01 (N = 100 years). This is the core of the paper focusing on the analyses of extreme...
Split nitrogen doses and their efficiency in poppy (Papaver somniferum L.) nutrition
T. Lošák, R. Richter
Plant Soil Environ., 2004, 50(11):484-488 | DOI: 10.17221/4062-PSE
The efficiency of partial doses of nitrogen applied to poppy (Papaver somniferum L.) plants, cv. Opál, was followed in a pot experiment. The ammonium nitrate was applied either in a single dose at the beginning of growing season or in two split doses with the second application at the stage of flowering. With the increasing dose of nitrogen the number of capsules per a plant during the harvest and their volume increased irregularly. The separated application of an optimum dose of N (i.e.0.9 g N/pot) showed a statistically highly significant positive effect on the yield of poppy seeds compared to the same single dose of N made this figure increased...
Evaluation of methods for wheat grain hardness determination
O. Faměra, M. Hrušková, D. Novotná
Plant Soil Environ., 2004, 50(11):489-493 | DOI: 10.17221/4063-PSE
Grain hardness of winter wheat cultivars was evaluated during 1997-2001 using several methods: wheat hardness index WHI (DO-Corder Brabender), 0.140 mmsieve threw ratio PPS (DO-Corder Brabender), grain hardness by NIR (Inframatic 8611 Perten), particle size index PSI (LM 3303 Perten). All tested methods showed varietal (genetic) origin of grain hardness trait and it is possible to use these methods for grain hardness determination. NIR method have had the lowest coefficient of variation (12.6%), WHI and PSI coefficient of variation was 32.8 and 30.6%, respectively. A significant influence of year-class was found only for PPS method. A high value of...
The effects of soil organic matter on seedling emergence in sunflower (Helianthus annuus L.)
F. Önemli
Plant Soil Environ., 2004, 50(11):494-499 | DOI: 10.17221/4064-PSE
Seedling emergence is one of the most important factors in the establishment of optimum plant density for a maximum yield. Seed quality and seedbed conditions affect seedling emergence. Seedbed condition is affected by soil content, especially soil organic matter. Therefore, the objective of this study was to determine the effects of soil organic matter on germination and seedling emergence of three hybrid sunflower (Helianthus annuus L.) cultivars. This research was conducted in 2000 and2001 in field and glasshouse conditions. Perlite and 20 soils with different organic matter contents were used as seedbed conditions. Soil organic matter,...
Nitrogen uptake and its efficiency in triticale (Triticosecale Witt.) - field beans (Vicia faba var. minor L.) intercrop
P. Sobkowicz, R. Śniady
Plant Soil Environ., 2004, 50(11):500-506 | DOI: 10.17221/4065-PSE
A field experiment of split-plot design was conducted in 1999 and 2000 on light soil to study the effect of different levels of mineral nitrogen fertilization: 0, 25 and50 kgN/ha on dry matter yield, N uptake and N efficiency indices of spring triticale and field beans grown in pure stands and in intercrop. The intercrop was composed using half of the seeding densities from pure stands. Intercropping increased protein content in grain and plant biomass of triticale irrespective of N input. Increasing N rate from 0 to 25 kg/ha increased plant biomass yield of triticale and intercrop. Nitrogen uptake with grain and biomass of intercrop was significantly...
Consistency of spatial dependence of soil chemical properties in two fields: a geostatistical study
L. Brodský, V. Vaněk, L. Borůvka, J. Száková
Plant Soil Environ., 2004, 50(11):507-512 | DOI: 10.17221/4066-PSE
This study examined consistency of spatial variation of plant-available soil nutrients P, K, Mg and soil pH in two fields of an area of 54 and67.5 ha(haplic Luvisol and luvic Chernozem) in the region of Český Brod (Central Bohemia). Computed variograms showed a spatial dependence extending to150 mon an average with small fluctuations for most analysed data sets. These results of two different fields indicate that soil spatial variation is rather a general feature than specific to every field. However, soil available Mg in one field showed a shorter-range (89 m) and soil pH in the other showed considerably longer-range (375 m). Consistency of spatial...