The results show that in the same H & A, with depth of soil increasing, contents of organic matter(OM), NO-3-N, available phosphor(AP) and urease decreased respectively.
结果表明，对于同一封育年限的油松林地，土壤有机质、硝态氮、速效磷和脲酶含量随采样深度增加而减小；
And there is a significant correlation between the mass content of available P and soil depth (P<0.05) and the mass percentage of available P is verified regularly with the increasing of soil depth.
通过方差分析和回归性分析表明，不同林地之间有机碳、速效磷和速效钾质量分数差异性显著（P<0.05）且与土层厚度有明显相关性，并随土层深度的增加呈规律性变化。
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