土壤磷组分对有效磷影响的通径分析及其相对重要性

PATH ANALYSIS FOR THE EFFECT OF PHOSPHORUS POLES ON AVAILABLE PHOSPHORUS IN SOIL AND THE RELATIVE IMPORTANCE

本文用土壤无机磷分组与有机磷分组相结合,相关分析和通径分析相结合的方法,研究比较了土壤各组磷对有效磷的相对重要性。它们依次为:Al—P>中稳态有机磷>Fe—P>中等活性有机磷>活性有机磷>H_2O—P>高稳态有机磷>O—P>Ca—P。为正确认识和评价土壤有机磷在植物磷素营养中的作用开辟了新的途径。

The method of path analysis was applied to study the difference among phosphorus fractions to the plant phosphorus availability following the correlativity analysis on the basis of the fraction of inorganic and organic phosphorus. The order of relative imPortance of phosphorus fractions to the plant phosphorus availability as follow: Al—P>moderate resistant organic P>Fe—P>moderate labile organic P>labile organic P>H_2O—P>high resistant organic P>O—P>Ca—P. A new way to evaluate correctly the role of organic P in the Plant phosphorus nutrient was supplied by the method of path analysis in this paper.