水土保持学报2012，Vol.26Issue(2)：279-283,5.
冻融作用对棕壤磷素吸附-解吸特性的影响
Effects of Freeze-Thaw Cycles on Phosphorus Adsorption and Desorption Characteristic in Brown Earth
摘要
Abstract
A laboratory experiment was conducted to determine the effects of freezing and thawing on phosphorus adsorption desorption characteristic,brown earth was collected and subjected to laboratory tests.Langumuir,Freundlich and Temkin were used to fit equations about the adsorption processing,which can help to quantificationally reflect the effect of freezing and thawing on phosphorus adsorption mechanism.The equations between phosphorus desorption and adsorption were also simulated for further discussion about phosphorus adsorption and desorption characteristics of freezing and thawing earth.The results showed that,the trend of phosphorus adsorption in freezing and thawing treatments was all that the phosphorus adsorption capacity increased with the increasing of phosphorus concentration after freezing and thawing,but compared to the no freeze-thaw treatments samples,phosphorus adsorption curves showed smoother after freeze-thaw cycles.In the condition of freezing and thawing,phosphorus adsorption curves could be fitted by Langmuir equation.Phosphorus desorption capacity and corresponding maximum adsorption capacity adapted to linear correlation.Soil phosphorus fixed adsorption capacity lower after freezing and thawing,in other words,freezing and thawing process promoted the release of soil phosphorus and increased soil phosphorus loss risk.Furthermore,effect of repeated freeze-thaw cycles on phosphorus adsorption and desorption was more intense.关键词
磷/吸附-解吸特性/冻融作用/棕壤Key words
phosphorus/adsorption and desorption character/freeze-thaw/brown earth分类
农业科技引用本文复制引用
钱多,范昊明,周丽丽,武敏,郭萍..冻融作用对棕壤磷素吸附-解吸特性的影响[J].水土保持学报,2012,26(2):279-283,5.基金项目
国家自然科学基金项目 （）
