论文部分内容阅读
通过对退化砂姜黑土的无机磷组成和活化方法进行研究 ,结果表明 :砂姜黑土的无机磷以磷灰石(Ca10 -P)和闭蓄态磷酸盐 (O -P)的含量为高 ,分别占无机磷总量的 2 7%～ 48%和 2 6 %～ 37%。砂姜黑土中无机磷的总量以及其中Ca2 -P、Ca8-P、Al-P、Fe -P的含量均随着土壤肥力的退化而显著降低。在退化砂姜黑土中施用有机肥 ,能够大幅度提高速效磷的含量 ,而施用含有一定量溶磷细菌的肥料则可以在不增加全磷量的情况下 ,促进土壤中Ca10 -P和Ca8-P等向Ca2 -P、Al-P等形态无机磷的转化 ,从而提高土壤中速效磷的含量。
The results showed that the content of inorganic phosphorus in saprolium black soil is high with the content of apatite (Ca10-P) and closed-state phosphate (O-P) Accounting for 27% ~ 48% and 26% ~ 37% of the total inorganic phosphorus, respectively. The total amount of inorganic phosphorus and the contents of Ca2-P, Ca8-P, Al-P and Fe-P in shajiang black soil decreased significantly with the degradation of soil fertility. The application of organic manure in degraded saprolium black soil can greatly improve the content of available phosphorus, while the application of fertilizers containing a certain amount of phosphate-solubilizing bacteria can promote the growth of Ca10-P and Ca8- P to Ca2-P, Al-P and other forms of inorganic phosphorus conversion, thereby increasing soil available phosphorus content.