液态地膜覆盖影响土表蒸发过程的机理研究  

Mechanism of Hydromulching Effects on Soil Evaporation Process

作　　者：谷健[1,2] 尹光华[1] 郝亮[3,2] 李文惠[1,2] 黄鹏飞[1,2] 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳110016 [2]中国科学院大学,北京100049 [3]中国科学院科技政策与管理科学研究所,北京100190

出　　处：《土壤》2016年第3期574-580,共7页Soils

基　　金：国家“十二五”科技支撑计划项目(2011BAD16B12;2012BAD09B02;2013BAD05B07);国家公益性行业(农业)专项(201303125-9);辽宁省科技攻关项目(2014213004)资助

摘　　要：利用网室盆栽试验,观测分析了液膜覆盖下土壤水分蒸发强度的变化。结果表明:液膜覆盖可有效抑制土壤蒸发,根据液膜成分,将其抑制蒸发机理划分为封闭效应和固持效应;两种效应在不同阶段分别起主导作用,作用强度随液膜成分的不同组成而异。用Matlab对不同处理进行动力学方程拟合表明,合理使用液膜可以减少最大蒸发量,并延长半衰期。The net chamber experiment was conducted to study soil evaporation intensity with degradable hydromulehing. The results showed that degradable hydromulching inhibited soil evaporation process. According to hydromulching ingredients, the mechanisms were divided into sealing effect and retaining effect. Both effects played a leading role at different stages, and the intensity varied with the composition ratio of hydromulching. Different processing with Matlab kinetic equation showed that hydromulching could reduce maximum evaporation and extend its half-life with reasonable amount.

关 键 词：液态地膜 土表蒸发 封闭效应 固持效应 

分 类 号：S152.7[农业科学—土壤学]