利用根盒培养和田间栽培方法，研究了黑土和黑钙土玉米根际有机磷的亏缺和积累的状况。
Rhizo-box and field cultivation methods were used to study the delpletion and accumulation of organic P in maize rhizosphere on blackland and chernozem.
通过土柱试验，研究玉米和大豆根茬还田对黑土、黑钙土各类水解酶活性的影响。
This paper studied the effects of corn and soybean stubble on soil hydrolases.
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.
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