摘要
通过田间定位试验研究了渭北旱塬秸秆覆盖、地膜覆盖、秸秆加地膜覆盖及传统耕作保墒方式的土壤水分含量及动态变化 ,结果表明秸秆覆盖方法的保墒效果最好 ,2 m土层的有效水达 2 74.3 mm,比对照增加 3 3 .3 mm,降雨可下渗到 1 .6m。9月 1 5日分析 ,秸秆覆盖的表层土壤含水 2 9.9% ,地膜覆盖的 1 8.6% ,对照只有 1 3 .8%。
The method used in this study are plastic film beside mulching, plastic mulching, straw mulching, straw with plastic film mulching and no any mulching. From the field experiment these shown that the change characteristics of soil moisture of different mulching method in weibei rained area. The minimum tillage and straw mulching is the best method for conservation of soil moisture. The topsoil moisture content of straw mulching method and plastic film mulching are 21.9 percent and 29.9 percent respectively in Sep. but no mulching is 13.8 percent only.
出处
《西北农业学报》
CAS
CSCD
2001年第3期56-58,共3页
Acta Agriculturae Boreali-occidentalis Sinica
基金
国家"九五"科技攻关项目 96-0 0 4-0 4-0 5
陕西省科技攻关项目 96K0 2 -G2 -0 1资助
关键词
秸秆覆盖
地膜覆盖
土壤水分
渭北旱塬
分布特征
Straw mulching
Plastic film mulching
Soil moisture
Weibei rainfed Highland
