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Position: Home > Articles > Effect of Exogenous Low Molecular Weight Organic Acids on Soil Calcium,Phosphorus Release Kinetics Characteristics Northern Horticulture 2016 (23) 163-167

外源低分子量有机酸对土壤钙、磷释放动力学特性的影响

作  者:
刘慧;栗杰;贺云龙;王觊琼;张大庚
单  位:
沈阳农业大学土地与环境学院
关键词:
低分子量有机酸;钙;磷;动力学
摘  要:
以含钙相对较高的褐土为试材,采用批量恒温震荡法,研究了添加不同浓度外源低分子量有机酸(草酸、柠檬酸)对土壤钙素和磷素释放动力学特征的影响。结果表明:添加草酸和柠檬酸均可促进土壤中钙素的释放,随着有机酸浓度的增加土壤中钙的释放量逐渐增加,活化能力为草酸<柠檬酸;添加草酸促进了土壤中磷素的释放,低浓度柠檬酸则抑制了磷的释放,但随草酸、柠檬酸浓度的增加,磷的释放量均逐渐增加,对土壤中磷的释放量的影响为草酸>柠檬酸。添加草酸和柠檬酸促进土壤中钙的释放则抑制磷的释放,反之则促进土壤中磷的释放。添加外源低分子量有机酸对土壤中钙、磷释放过程的影响均可用Langmiur方程进行较好的拟合。
译  名:
Effect of Exogenous Low Molecular Weight Organic Acids on Soil Calcium,Phosphorus Release Kinetics Characteristics
作  者:
LIU Hui;LI Jie;HE Yunlong;WANG Jiqiong;ZHANG Dageng;Institute of Land and Environment,Shenyang Agricultural University;
关键词:
low molecular weight organic acids;;calcium;;phosphorus;;kinetics
摘  要:
Cinnamon soil with relatively high calcium was used as material,using batch method of constant temperature oscillation,the effect of two kinds of exogenous low molecular weight organic acids(oxalic acid and citric acid)on soil calcium,phosphorus release kinetics characteristics was studied.The results showed that adding oxalic acid and citric acid could promote the release of calcium element in the soil.With the increase of organic acid concentration,calcium releasing quantity in the soil increased gradually.The activation capacity of exogenous low molecular weight organic acids to calcium element in the soil was oxalic acid

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