通过黑钙土的培养试验，研究了不同作物根茬施入土壤后对土壤腐殖质的影响。
This paper studied the effects of different crop stubbles put in soil on soil humus by cultural experiment of churnozem.
本文对黑钙土、黑土中各种作物根茬留茬与否对土壤腐殖质、土壤重组有机质的组成、结合形态及某些光学性质进行了测定。
There are few studies on the effect of crop root systems on the composition, particularly on the heavy fraction of soil humus.
典型土壤选择草甸土、黑钙土、草甸碱土三种。
Selected soils are meadow soil, Black Calcium soil, and meadow alkali soil, respectively.
典型土壤选择草甸土、黑钙土、草甸碱土三种。
Selected soils are meadow soil, Black Calcium soil, and meadow alkali soil, respectively.
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