库区消落区紫色土与水稻土磷吸附解吸特征  

PHOSPHORUS SORPTION AND DESORPTION PROPERTIES OF PURPLWE AND PADDY SOILS IN WATER LEVEL FLUCTUATION ZONE IN THREE-GORGES RESERVOIR

作　　者：李静[1] 魏世强[1] 杨勇[1] 江帆[1] 胡巍[1] 

机构地区：[1]西南农业大学资源与环境学院,重庆400716

出　　处：《西南农业大学学报（自然科学版）》2005年第4期459-463,共5页Journal of Southwest Agricultural University

基　　金：国家教育部春辉计划资助项目

摘　　要：淹水和干湿交替条件下,土壤磷水土界面的迁移能力有较大的差别,模拟研究结果表明:淹水和干湿交替能促进紫色土和水稻土对磷的吸附,减小磷的解吸率,降低磷水土界面的迁移能力,其向环境中的释磷风险为未淹水土壤>干湿交替土壤>淹水土壤,紫色土>水稻土。The potential P loss from purple and paddy soils under flooding and alternate flooding - air drying was evaluated in a laboratory simulation experiment. It was shown that P sorption capacity under flooding and flooding - air drying conditions was higher than that of the dryland soil. P loss from flooding soil via runoff and leaching was lower than that from the alternate flooding - air drying soil and dryland soil, and the risk of P loss from the paddy soil was lower than that from the purple soil.

关 键 词：磷 淹水 干湿交替 等温吸附解吸父 

分 类 号：S153.61[农业科学—土壤学]