Plant, Soil and Environment, 2010 (vol. 56), issue 8
Biogeochemical cycles of chlorine in the coniferous forest ecosystem: practical implications
M. Matucha, N. Clarke, Z. Lachmanová, S.T. Forczek, K. Fuksová, M. Gryndler
Plant Soil Environ., 2010, 56(8):357-367 | DOI: 10.17221/67/2010-PSE 
Chlorine - one of the most widespread elements on the Earth - is present in the environment as chloride ion or bound to organic substances. The main source of chloride ions is the oceans while organically bound chlorine (OCl) comes from various sources, including anthropogenic ones. Chlorinated organic compounds were long considered to be only industrial products; nevertheless, organochlorines occur plentifully in natural ecosystems. However, recent investigations in temperate and boreal forest ecosystems have shown them to be products of biodegradation of soil organic matter under participation of chlorine. It is important to understand both the inorganic...
Effect of natural and growing conditions on the contentof phenolics in potatoes with different flesh colour
K. Hamouz, J. Lachman, K. Hejtmánková, K. Pazderů, M. Čížek, P. Dvořák
Plant Soil Environ., 2010, 56(8):368-374 | DOI: 10.17221/49/2010-PSE
In precise field trials in the Czech Republic from 2004-2008 the impact of location conditions, varieties with yellow, purple and red flesh and mineral fertilization on the content of total polyphenols (TP) and chlorogenic acid was investigated. The highest TP contents were reported at two locations with extreme climatic conditions; in those under stress due to low temperatures in the vegetation period at the mountainous area Stachy (5.89 mg TP/g DM) and those under drought stress in the warm lowland location Přerov nad Labem with light sandy soil (5.81 mg TP/g DM). The five-year experiment with the purple-fleshed Valfi variety (13.29 mg TP/g DM) reached...
Biochemical characterization and metabolic diversity of soybean rhizobia isolated from Malwa region of Central India
Mahaveer P. Sharma, Khushboo Srivastava, Sushil K. Sharma
Plant Soil Environ., 2010, 56(8):375-383 | DOI: 10.17221/247/2009-PSE
Soybean cultivation in many zones of India shows occurrence of native rhizobia besides other exotically adapted strains. In the current study, 22 rhizobial isolates (recovered from 12 different soybean growing sites) and 8 reference strains were selected for biochemical and metabolic characterization. Of 22 isolates, 18 were recovered as fast growing isolates while the rest were slow growing based on bromothymol blue (BTB) test. Unlike earlier belief that rhizobia have no ability to grow on glucose peptone agar medium, in this study, some isolates and some reference strains grew well on this medium. Similarly, when all the isolates were subjected to...
Soybean yield and yield component distribution across the main axis in response to light enrichment and shading under different densities
B. Liu, X.B. Liu, C. Wang, Y.S. Li, J. Jin, S.J. Herbert
Plant Soil Environ., 2010, 56(8):384-392 | DOI: 10.17221/189/2009-PSE
A 2-year field experiment was conducted under light enrichment and shading conditions to examine the responses of seed yield and yield components distribution across main axis in soybean. The results showed that the maximum increase in seed yield per plant by light enrichment occurred at 27 plants/m2, while the most significant reduction in seed yield per plant by shading occurred at 54 plants/m2. Light enrichment beginning at early flowering stage decreased seed size on average by 7% while shading increased seed size on average by 9% over densities and cultivars, resulting in a fewer extent compensation in seed yield decrement....
Mechanical weeding of Rumex obtusifolius L. under different N, P and K availabilities in permanent grassland
L. Strnad, M. Hejcman, V. Křišťálová, P. Hejcmanová, V. Pavlů
Plant Soil Environ., 2010, 56(8):393-399 | DOI: 10.17221/83/2010-PSE
In Europe, Rumex obtusifolius L. is the most problematic grassland weed species, especially under the conditions of organic farming. The aims of this study were (1) to investigate the effectiveness of repeated mechanical weeding of R. obtusifolius from the permanent sward, cut two or three times per year, by digging the plants out from 5 cm below the soil surface, and (2) to test the effect of nutrient availability on the effectiveness of mechanical weeding. In 2007, the manipulative experiment was established on permanent grassland infested by R. obtusifolius using the following fertilizer treatments: control, P, N, NP and...