模拟酸雨对荔枝果园土壤磷素等温吸附与解吸特性的影响  

Effects of Simulated Acid Rain on Phosphorus Adsorption and Desorption Characteristics of Litchi Orchard Soils

作　　者：张新明[1] 张俊平[1] 刘素萍[2] 王长委[1] 刘彦红[1] 

机构地区：[1]华南农业大学资源与环境学院,广东广州510642 [2]中国科学院沈阳应用生态研究所,辽宁沈阳110016

出　　处：《土壤通报》2007年第5期938-941,共4页Chinese Journal of Soil Science

基　　金：深圳市农业综合开发基金(2003-96)资助

摘　　要：采用等温吸附试验方法研究了模拟酸雨对荔枝果园土壤磷的吸附与解吸特性的影响。试验结果表明,不同处理间土壤对磷的最大吸附量(Xm)为pH2.5>pH4.5>CK=pH6.5,其中pH2.5的酸雨淋溶处理对磷的最大吸附量(Xm)与其它处理间差异显著;土壤吸附磷的解吸量(Xd)分别与相应的吸附量(X)和原平衡溶液浓度(C)呈显著的指数相关和线性相关,随着土壤对吸附量的增加,土壤磷的解吸量呈指数增长。Through isothermal adsorption experiment, the effects of simulated acid rain on phosphorus adsorption and desorption characteristics of litchi orchard soils under consideration were studied. It was shown that phosphorus adsorption maximum （Xm） of the tested soils after acid rain leaching was sequentially pH2.5〉pH4.5〉CK=pH6.5, and significant differences between pH 2.5 and the other pH treatments were found. Phosphorus desorption increased with the increment of adsorption amount within same tested soils, and the correlationship between desorption and adsorption behaved significantly exponential.

关 键 词：模拟降雨 荔枝果园土壤 磷素吸附与解吸 

分 类 号：S153[农业科学—土壤学] X517[农业科学—农业基础科学]