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土壤磷素形态的分级,对研究磷素形态转化及有效性,对了解土壤供磷状态,指导磷肥的合理施用等都是极其重要的。石灰性土壤无机磷的分级,过去一直沿用张守敬等(1957)的方法,但该法对石灰性土壤中占主要成份的Ca-P没有从有效性上进一步分级。70年代苏联专家(1971)提出了Ca—PⅠ、Ca—PⅡ和Ca—PⅢ,以及Al—P、Fe—P的五级分级方法,虽在张守敬等分级的基础上进行了较大的改进,但未能普遍应用。最近蒋柏藩等(1989,1990)提出了石灰性土壤无机磷分级的新方法。本文对蒋柏藩等和张守敬等的两种分级方法进行了比较研究。
Classification of soil phosphorus forms, the study of the transformation of phosphorus forms and effectiveness of understanding of soil phosphorus status, and guide the rational use of phosphate are extremely important. In the past, the method of Zhang Shou-jing et al. (1957) was used to classify inorganic phosphorus in calcareous soil. However, Ca-P, which is the major component in calcareous soil, has not been further classified by its validity. In the 1970s, the Soviet Union experts (1971) proposed five grading methods of Ca-PⅠ, Ca-PⅡ and Ca-PⅢ, and Al-P and Fe-P. Although the improvement was based on the grading of Zhang Shou- But not universally applied. Recently, Jiang Bowan et al. (1989, 1990) proposed a new method for grading inorganic phosphorus in calcareous soils. In this paper, Jiang Bo-fan and Zhang Shou-jing and other two grading methods were compared.