水土保持学报2012，Vol.26Issue(6)：63-67,5.
柑橘地土壤溶质优先运移研究
Preferential Transport of Non-absorptive Solute Under Citrus Land
摘要
Abstract
The characteristic of preferential flow and preferential transport was analyzed with undisturbed and packed soil columns applied breakthrough curve(BTC).The result showed the effect of preferential flow and matrix flow was responsible for the turning point in the rising phase of BTC in undisturbed soil column.In the decreasing phase,compared with packed soil column with a relatively steady effluent rate,undisturbed soil column had a long trailing.Preferential flow was the contribution to the less stable of soil effluent rate and coefficient of variation.The average effluent rate of undisturbed soil column was 3.5 times higher than the average effluent rate of packed soil column.Preferential flow shortened the breakthrough time of 37.7% while transported 2.5 times solute higher than matrix flow when the solute relative concentration reaching the peak.Preferential flow can lead a fast mass of soil solute migration.关键词
穿透曲线/土壤溶质运移/优先流/优先运移/柑橘Key words
breakthrough curve/solute transport in soils/preferential flow/preferential transport/citrus分类
农业科技引用本文复制引用
孙龙,张洪江,程金花,王彬俨,王贤..柑橘地土壤溶质优先运移研究[J].水土保持学报,2012,26(6):63-67,5.基金项目
国家自然科学基金项目 （）
国家＂十二五＂科技支撑计划项目 （）
中央高校基本科研业务费专项 （）
