摘要
本文主要对新疆三种耕地土壤进行磷的恒温吸附,检验它们对现有的三种吸附模型(Langmuir Temkin Freundlich 方程)的吻合性,研究供磷特性与施磷量。土壤吸磷量与三种吸附模型的相关:Freundlich 方程拟合最佳,Temckin 方程次之,Langmuir 方程最差。Freundlich 和 Langmuir 方程具有很好的预测性,计算出来的施磷量与土壤 Olsen 磷呈明显的负相关,从实用性看Freunlich 方程估计的理论值要更合适。
This article maily illustrates three types of cultivated soil in XingJing ab- sorbing phosphorus under constant temperature to check the suitability of three models of thermostie absorption(Langmuir,Temkin and Frcundlich equation)and studies their properties of supplying with phosphorus. 1.By the correlativity between absorbed-pinsoil and three models,Frcundlich's model is the best in three types,Temkin's model is better than Langmuir's,but Langmuir's is the worst in the types. 2.In accordance with the predictability of supplying phosphorus,Frcundlich's and Langmuir's models are better.The dose of applied fertilzer-P calculated from the models has distinctly negative interrelation with Olsenp.In practice,theoretical value estimated from Freundlich-equation is more suiltable.
关键词
恒温吸附
磷
相关系数
土壤
thermostatic absorption
phosphorus
coefficient of correlation
