白云石粉对皖南酸性红黄壤磷组分及磷有效性的影响  

Effects of Dolomite on Chemical Fractions and Availability of Phosphate in Acid Red and Yellow Soil of South Anhui Province

作　　者：王文军[1] 郭熙盛[1] 武际[1] 朱宏斌[1] 

机构地区：[1]安徽省农业科学院土壤肥料研究所,合肥230031

出　　处：《土壤》2006年第4期448-452,共5页Soils

基　　金：北美钾磷研究所/加拿大钾磷研究所(PPI/PPIC)资助项目。

摘　　要：在施用P肥的基础上配合使用白云石粉,用酸性土壤无机P分级方法测定皖南红黄壤各形态P的含量。结果表明:使用P肥能明显提高土壤全P、无机P和土壤速效P含量;土壤速效P与无机P各组分的相关性以Al-P最好,Fe-P、O-P次之,Ca-P最差。施用白云石粉,当季土壤Ca-P含量及其在无机P中所占的比例明显提高,Al-P的形成受到抑制,但随着时间的推移,却更有利于有效性较高的Al-P含量的增加。Effects of dolomite on chemical fractions and availability of phosphate in red and yellow soil of south Anhui Province were studied. Results showed that application of P fertilizer could improve the contents of total P and inorganic P significantly, while decreased the content of organic P. The correlations between the contents of available P and various fractions of inorganic P were best for AI-P, Fe-P and O-P second, and Ca-P worst. AI-P is the most important source of available P. As time passed by, the effect of dolomite increasing the content of AI-P was getting more significant.

关 键 词：白云石 酸性红黄壤 无机磷组分 相关性 

分 类 号：S155.24[农业科学—土壤学] S155.25[农业科学—农业基础科学]