摘要
[目的]充分利用土壤矿物态钾,提高土壤供钾能力.[方法]研究低分子量有机酸乙酸、乳酸、苹果酸、柠檬酸、草酸对土壤钾释放的影响.[结果]土壤钾释放分为快速释放(0～100 h)和稳定释放(100 h后)2个阶段,其中快速释放阶段的钾释放速度快,单位释放量大,持续时间较短;稳定释放阶段的钾释放较慢,单位时间钾释放量较小,持续时间长.土壤钾释放动态曲线接近对数方程和幂函数方程,拟合效果较好,与抛物线方程拟合效果较差.[结论]有机酸活化土壤钾能力从大到小依次为草酸、柠檬酸、苹果酸、乙酸、乳酸.
Abstract
[Objective] The aim of the study was to use mineral soil potassium,and improve soil potassium supplying capacity.[Method] The effects of low molecular weight organic acids of acetic acid,lactic acid,malic acid,citric acid,oxalate on soil potassium release were studied.[Result] Soil potassium release included quick release (0-100 h) and stable release (after 100 h).In fast release phase,potassium released speed,and released large units with short duration.In released phase,slow released potassium,potassium emission per unit time was small,long duration.Dynamic curve of soil potassium released in nearly logarithmic equations and exponential equations fitted better with the parabolic equation was poor.[Conclusion] The order of organic acid activating soil potassium capacity was by oxalic acid,citric acid,malic acid,acetic acid,lactic acid.
基金项目
河南省烟草公司科技攻关项目(HYKJ201103)
国家科技期刊平台
NSTL
维普
万方数据