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.
出处
《土壤》
CAS
CSCD
北大核心
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。
关键词
白云石
酸性红黄壤
无机磷组分
相关性
Dolomite, Acid red-yellow soil, Chemical fractions of inorganic phosphate, Correlation
