氯化铵和氯化钾对太湖黄泥土磷释放的影响  

Effects of ammonium chloride and potassium chloride on phosphorus release of Taihu paddy soil

作　　者：李寿田[1,2] 周健民[2] 王火焰[2] 杜昌文[2] 陈小琴[2] 

机构地区：[1]苏州农业职业技术学院,江苏苏州215008 [2]中国科学院南京土壤研究所,江苏南京210008

出　　处：《河北农业大学学报》2012年第6期33-38,共6页Journal of Hebei Agricultural University

基　　金：国家重点基础研究发展计划973项目(2013CB127401);国际植物营养研究所(IPNI)中国项目

摘　　要：铵钾磷共施是农业生产中的普遍现象,而铵钾对磷的释放的影响决定着土壤中磷对植物的有效性和对水体环境的潜在危害性。试验以太湖黄泥土为试材,通过连续提取法,对铵钾磷共处理土壤磷的释放进行了研究,并对磷的释放动力学进行了不同模型的拟合。结果表明:铵磷共处理土壤,随着氯化铵加入量的增加,磷的释放量、释放率和释放总量均下降;钾磷共处理土壤,随着氯化钾加入量的增加,磷的释放量、释放率和释放总量均增加;铵钾磷共处理土壤,磷的释放量、释放率和释放总量介于其间。通过比较不同模型拟合决定系数R2的大小,磷的释放动力学用零级方程、双常数方程和Parabolic扩散方程拟合效果最好。It is very common to apply fertilizer by compounding ammonium,potassium and phosphorus together in agriculture production,and plant availability,and hazard potential to water environment of soil phosphorus are related with the effects of ammonium and potassium on phosphorus release of soil.In this experiment,effects of ammonium chloride and potassium chloride on phosphorus release of paddy soil were conducted using sequential extraction,and six kinetic models were evaluated to describe the kinetics of phosphate release.The results showed that amounts,ratios and total amounts of phosphorus release were decreased with the increase of addition of ammonium chloride in soils treated by ammonium and phosphorus together,amounts,ratios and total amounts of phosphorus release were increased with the increase of addition of potassium chloride in soils treated by potassium and phosphorus together,and that of soils treated by ammonium,potassium and phosphorus were higher than that of soils treated by ammonium and phosphorus,and less than that of soils treated by potassium and phosphorus.Comparison of the coefficients of determination（R2） indicated that the fitness of ZO,TC and PD equations are better than that of FO,SO and ET equations.

关 键 词：氯化铵 氯化钾 磷 释放动力学 

分 类 号：S158[农业科学—土壤学]