不同成土母质胶园土壤磷素形态研究

Phosphorus Forms in Different Parent Materials of Rubber Plantation Soil

通过研究云南一代、二代胶园不同成土母质土壤无机磷(Ca-P,Al-P,Fe-P,O-P)、有效磷、全磷的含量,无机磷在不同成土母质中的比例及不同形态磷素间的相互关系,旨在为提高胶园土壤磷肥利用率提供理论依据。研究结果表明:一代、二代胶园的Fe-P、全磷含量呈现千枚岩>花岗岩>砂页岩;花岗岩、千枚岩、砂页岩中的Fe-P、O-P含量呈现二代胶园>一代胶园;无机磷在不同成土母质中的比例呈现Ca-P>Fe-P>Al-P>O-P;不同形态磷素间,全磷与有效磷、Al-P显著相关,与Fe-P,Ca-P,O-P、有机质极显著相关,有效磷与Fe-P、Al-P极显著相关。

By studying the forms of inorganic phosphorus(Ca-P,Al-P,Fe-P,O-P),available phosphorus and total phosphorus in the soil parent materials of the first and second generation rubber plantations in Yunnan Province,the distribution proportion of inorganic phosphorus in the soil parent materials and the relationship between different forms of phosphorus,the purpose is to provide theoretical basis for improving the utilization rate of phosphorus fertilizer in rubber plantation soil.The results show that Fe-P and total phosphorus of the first and second generation rubber plantations are phyllite>granite>Sand Shale,and Fe-P and O-P of granite,phyllite and sand shale are second generation rubber plantations>first generation rubber plantations.The distribution ratios of inorganic phosphorus forms in different parent materials of the first and second generation rubber plantations showed Ca-P>Fe-P>Al-P>O-P.Of which different phosphorus forms,total phosphorus was significantly correlated with available phosphorus,Al-P,Fe-P,Ca-P,O-P and organic matter,and available phosphorus was significantly correlated with Fe-P and Al-P.