The studies on desorption model afforded a new method to estimate biological validity of soil p.
解吸模型研究为评价土壤磷素有效性提供了一种新方法。
Soil P was mainly distributed in the fine fractions on the acidic soils, however on the calcareous soils in the coarser fractions.
在酸性土壤中P主要分布在较细的粒级中，而在石灰性土壤中则主要分布在较粗粒级中。
Soil microbial biomass P is a valuable resource to plant P nutrient, and also play an important role in the transformaion of soil phosphorus.
土壤微生物生物量磷是植物磷素营养极其重要的来源，对土壤磷素的供给和调节起着重要作用。
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