Plant, Soil and Environment, 2002 (vol. 48), issue 8
Vulnerability of soil aggregates in relation to soil properties
L. Borůvka, M. Valla, H. Donátová, K. Němeček
Plant Soil Environ., 2002, 48(8):329-334 | DOI: 10.17221/4376-PSE 
Stability of soil structure represents an indicator of soil quality. The aim of this paper was to assess the effect of soil properties on structure vulnerability in an Orthic Luvisol. The aggregates were most vulnerable to fast wetting (mean Kv1 = 9.99, i.e. this effect can decrease the aggregate size 9.99 times). Lower destruction was caused by slow wetting and drying (Kv2 = 3.70) and mechanical forces (Kv3 = 1.67). Fine silt (particles of 0.002-0.01 mm) was the most important soil characteristic decreasing aggregate vulnerability (r = -0.334, -0.248, and -0.393 for Kv1, Kv2, and Kv3,...
Immobilisation of As, Cd, Pb and Zn in agricultural soils by the use of organic and inorganic additives
R. Vácha, E. Podlešáková, J. Němeček, O. Poláček
Plant Soil Environ., 2002, 48(8):335-342 | DOI: 10.17221/4377-PSE
The efficiency of the application of organic and inorganic additives on the reduction of mobility and transfer of As, Cd, Pb and Zn from the soil into the plants was observed. The dung, compost, acid peat and muck presented organic additives. Synthetic zeolite - type Pc of cubic structure, loamy shale and dolomite limestone presented inorganic additives. Five soil types were used during the testing (arenic regosol, typic cambisol, dystric cambisol, typic chernozem and typic fluvisol). The changeover of the mobility of As, Cd, Pb a Zn in the soil (the ratio of mobile and total contents, sequential analysis) and the transfer of the elements from the...
Characterization of Czech hop (Humulus lupulus L.) genotypes by molecular methods
J. Patzak
Plant Soil Environ., 2002, 48(8):343-350 | DOI: 10.17221/4378-PSE
In the last year, new hybrid hop (Humulus lupulus L.) variety Agnus was released for cultivation in the Czech Republic. It has been necessary to prepare the quality system of Agnus identification from other Czech genotypes and characterise the germplasm of this variety by molecular methods. We proved that utilization of five STS primer combinations successfully and completely identified and determined Czech released varieties and new promising breeding materials. The use of STS method was also very effective and sensitive for control of authenticity and purity of variety Agnus in multipropagation cycle. The study of genetic diversity of 61...
Yield performance of two buckwheat genotypes grown as a full-season and stubble-crop
F. Bavec, S. Pušnik, I. Rajčan
Plant Soil Environ., 2002, 48(8):351-355 | DOI: 10.17221/4379-PSE
Traditional way of growing buckwheat (Fagopyrum esculentum L.) in Slovenia is stubble-crop production, but grown as a full-season crop it yields more. Genotypes that are adapted to stubble-crop system may not necessarily be the best adapted for the full-season crop. The objective of this study was to determine yield performance of two buckwheat genotypes under stubble-crop and full-season production system. The experiments (randomised block design) were conducted in Podravje region with two common determinant buckwheat genotypes (land race population and cultivar Darja) in 1997 and 1998. Buckwheat grown as a full-season crop had a greater...
Nodule efficiency of three soybean genotypes inoculated by different methods
V. Milić, N. Mrkovački, M. Popović, Đ. Malenčić
Plant Soil Environ., 2002, 48(8):356-360 | DOI: 10.17221/4380-PSE
The objective of the study was to investigate how the inoculation of soybean seed (variety Afrodita, and lines NS-L-2016 and NS-L-300168) with strains of Bradyrhizobium japonicum (1, 1a, 2b), Azotobacter chroococcum (3, 13, 14), and GA3 (gibberellic acid) affected plant dry weight, nitrogen content of nodules and whole plant, the enzymes of nitrogen assimilation (NR, GS) and soluble protein content. The highest dry matter mass and nitrogen content were found in the variety Afrodita, followed by line NS-L-300168. The GS and NR activity was increased significantly by all three inoculation treatments relative to the control. In all three...
The effect of undersowing time of clover crops and weeds on silage maize yields
P. Jamriška
Plant Soil Environ., 2002, 48(8):361-367 | DOI: 10.17221/4381-PSE
In field experiments conducted on loamy luvic chernozem (170 m altitude, 48°34' N 17°45' E), the effects of undersowing time (5 days after maize was sown and into emerged stand) of lucerne, red clover and sainfoin on silage maize dry matter have been studied. The total dry matter yields were affected by time of undersowing of clover crops. The stands undersown after emergence of maize gave higher yields than former time of undersowing. The late time of undersowing improved conditions for growth of maize and formation of its yield. The number of maize plants had already insignificant effect on yields there. The dry matter weight, height, and number...
Male gametophytic generation and a possible approach for selective pollination in carnation (Dianthus) breeding program
Tejaswini
Plant Soil Environ., 2002, 48(8):368-375 | DOI: 10.17221/4382-PSE
Present study focuses on making best possible use of male gametophytic generation in carnation breeding program. Exploration of pollen population revealed the existence of variability in terms of pollen morphology and histochemical content among as well as within varieties and species of Dianthus caryophyllus and D. chinensis sufficient to make selection. Pollen grain size and histochemical content were found to be associated with germination capacity and pollen tube growth rate. In addition, pollen germination capacity and elongation of pollen tube in response to presence of culture filtrate from F. oxysporum. f.sp. dianthi...