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vol. 8, nr. 4 (2006)
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Biochemical activity of lessive soil under soybean cultivated with various systems
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Jadwiga Furczak
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Department of Agricultural Microbiology, Agriculturral University, ul. Leszczyńskiego 7, 20-069 Lublin |
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vol. 8 (2006), nr. 4,
pp. 815-824
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abstract:
The studies were carried out on lessive soil (Ap level) under 8-year-old cultivation of 4 soybean monocultures (soybean, soybean + ploughed soybean straws, soybean + ploughed mustard, soybean + ploughed rye) as well as 2 rotations with 25% and 50% shares of soybean (potato – spring wheat – soybean – winter wheat, soybean – spring wheat – soybean – winter wheat). It was found that soil biochemical activity under the experimental combinations varied depending on soybean tillage system and type of biochemical test applied. Comparison of biochemical activities of soil under the crop rotations showed significantly higher levels of some parameters in the variant with 50% soybean share. Among the applied tests, only soil respiratory activity for all monocultures remained at significantly higher level than in the crop rotations. Nitrification intensity, dehydrogenase, protease and urease activities and, in some monocultures, also ammonification were significantly lower as compared to the combination with 50% soybean participation. Referring to the crop rotation with 25% soybean share, decrease of soil biochemical activity for monocultures was less pronounced, and even not observed in some tests.
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keywords:
lessive soil, soybean monocultures, soybean rotation cultivations, soil biochemical activity
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original in:
Polish
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