几种水稻土对磷的吸附及解吸特性研究

Study on Characteristics of Phosphate Adsorption and Desorption of Paddy Soils

水稻土对磷的吸附曲线与简单Ｌａｎｇｍｕｉｒ等温吸附方程基本吻合，土壤对磷的吸附及解吸能力主要受土壤物理性粘粒含量及土壤活性铁、活性铝含量的影响，而与土壤本身有效磷含量无关。同一种水稻土随吸附磷量的增加。

The adsorption curve of paddy soils to phosphate coincides with Langmuir isotherm adsorption and the desorption of soils to P result from soil physical clay content and soil activeiron and active aluminum,not from available P content.With the increasement of P adsorption content,its desorption rate teads to increas.