水土保持研究2017，Vol.24Issue(6)：62-67,6.
黄土塬区不同地膜覆盖度下土壤水热状况研究
Soil Hydrothermal Status Under Different Degrees of Film Mulching Coverage on the Loess Tableland
摘要
Abstract
In order to further optimize film planting patterns and understand crop production mechanisms,responsive characteristics of soil hydrothermal status to different degrees of film mulching coverage (30％,50％,70％,85 ％,100％,and CK or 0％) were studied under the condition of dry farmland furrows with no crops on the loess tableland.The results showed that:(1) the water conservation effects (Y,the increment of soil water storage from April to September) were correlated with film coverage (X),the fitted equation was expressed as Y =1.65X+42.60,with a correlation coefficient of R =0.98;the greater film coverage was,the more validness of precipitation accumulation in 5 m soil profile was,the depth of rainfall infiltration under the film mulching condition was 3 m below the soil surface;(2) soil temperature increased with the increment of film coverage,which was good for crop emergence in low temperature season;soil temperature for the 85％ mulching was almost the same as the whole-film mulching,ground temperature reached a maximum faster,with a higher peak value from the 30％ of film mulching to 85％;(3) the 85％ of film-covering was best pattern in terms of soil hydrothermal status under film mulching cultivation and economic benefits in farmland.关键词
黄土塬区/地膜/不同覆盖度/土壤水分/土壤温度Key words
loess tableland/film/different degrees of coverage/soil moisture/soil temperature分类
农业科技引用本文复制引用
刘春芬,刘文兆,林文,韩晓阳,李超..黄土塬区不同地膜覆盖度下土壤水热状况研究[J].水土保持研究,2017,24(6):62-67,6.基金项目
863计划课题(2013AA102904) （2013AA102904）
公益性行业(气象)科研重大专项(GYHY(QX)201506001) （气象）
