Seasonal variations of soil microbial biomass carbon within the plough layer
1993; Elsevier BV; Volume: 25; Issue: 12 Linguagem: Inglês
10.1016/0038-0717(93)90166-9
ISSN1879-3428
AutoresErnst‐August Kaiser, O. Heinemeyer,
Tópico(s)Soil and Unsaturated Flow
ResumoOver 31 months microbial biomass-C was estimated using the substrate induced respiration technique in fields with conventional soil management, where sugar beet-winter wheat-winter barley were grown in a crop rotation. Analysing the plough layer at different depths (0–10, 10–20 and 20–30 cm) seasonal variations were observed in the amount of microbial biomass-C due to soil and crop management. Although after ploughing microbial biomass-C distribution was homogeneous, a gradient, with decreasing amounts of biomass-C with depth, developed within the plough layer during the early growing season. This was due to a rapid increase of microbial biomass-C in the surface layer (0–10 cm). Throughout autumn and winter there was no change in microbial biomass-C distribution with depth. Within the crop rotation microbial biomass-C content increased in the order sugar beet, winter wheat and winter barley.
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