There was very little fertilizer N residue left, most of which entered the organo-mineral complex, while a part of the soil N was activated.
化肥氮残留很少，大部分进入土壤有机无机复合体中，而部分土壤氮被活化。
The paper studies organic mineral complex component and distribution character of organic carbon of black soil under various cultivation pattern.
研究了不同耕作方式下黑土有机无机复合体组成及有机碳在各级复合体中的分布特征。
The variation of organic-mineral complex content and the distribution characteristics of organic carbon fractions in black soil plough layer under different tillage periods;
研究了不同耕作方式下黑土有机无机复合体组成及有机碳在各级复合体中的分布特征。
The organic carbon content in each organic-mineral complex of tillage layer is decreasing obviously with tillage period increasing, and that also has a decreasing trend in below plough layer.
黑土耕层各复合体中有机碳含量均明显减少，犁底层亦表现出降低的趋势。
The organic carbon content in each organic-mineral complex of tillage layer is decreasing obviously with tillage period increasing, and that also has a decreasing trend in below plough layer.
黑土耕层各复合体中有机碳含量均明显减少，犁底层亦表现出降低的趋势。
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