英语语法分析

A comprehensive review of the studies on soil organic nitrogen compounds and the types of its mineralizable models is presented.

就目前土壤有机氮组分方面的研究情况作一简要综述，探讨土壤有机氮矿化模型类型，以及今后其模型研究的方向。

The relationship between mineralizable soil N and crop N uptake was studied under the condition of pot and field experoments respectively.

在盆栽和田间条件下，研究了作物吸氮与土壤可矿化氮的关系。

The factors affecting soil microbial biomass nitrogen and the relationship between soil microbial biomass nitrogen and mineralizable nitrogen are reviewed.

在杨凌中等肥力红油土上进行大田试验 ，研究土壤生物体氮的变化及影响因子。