施磷对土壤电荷种类和电荷数量的影响

Effect of Phosphorus Applications on Soil charge

研究旨在查明不同磷素含量对土壤胶体中电荷的数量及种类的影响,尤其是磷素进入土壤一定时间后经过一系列化学变化后的磷的不同存在形式对土壤电荷的影响及它们之间可能存在的相互关系,以不同施磷处理后所形成的不同磷素含量的系列土壤样品为试材,测试土样中永久电荷及可变电荷的数量及组成后,采用室内分析的方法研究了土壤中各种形态无机磷素含量与土壤电荷种类和电荷数量之间的关系。研究结果表明:土壤中各种形态无机磷含量,除对土壤中永久负电荷数量没有影响外,对土壤中最大负电荷、可变负电荷、甚至正电荷数量都有不同程度的影响。就土壤中存在的磷素形态而言,除Ca10-P外,其他几种形态无机磷含量均与土壤中的最大负电荷和可变负电荷数量之间呈现明显的正相关。就各种形态磷素对可变负电荷的贡献率而言,土壤有效磷的贡献率最高,达到了0.35,Fe-P的贡献率其次,可以达0.29,再其次为Ca2-P,贡献率为0.15,AL-P的贡献率最小,只有0.11。

Based on different P treatments of different phosphorus content of a series of soil samples as test ma-terials,in the methods of laboratory analysis to study the relationship between various forms of inorganic phos-phorus content of soil charge types and charge quantity in the soil. The results show that：the number of vari-ous forms of inorganic phosphorus content in the soil,have large influence on soil negative charge,variable negative charge and positive charge except for permanent negative. Phosphorus forms in the presence of soil, several forms of inorganic phosphorus content with the largest negative charge in soil and variable negative charge number between showing a significant positive correlation. with the exception of the Ca 10-P. Various forms of phosphorus in terms of the contribution rate of the variable negative charge,the highest contribution rate of soil available phosphorus,reaching 0. 35,the contribution rate of Fe-P followed by 0. 29,and then fol-lowed by Ca2-P,the contribution rate minimum is 0. 15,AL-P contribution rate of only 0. 11.