黄土高原区农田覆盖效应与前景分析

The benefit and prospect of farmland mulcb on Loess Plateau.

依据黄土高原区的水热条件,结合已有研究结果,简述了黄土高原地区农田不同覆盖类型,诸如秸秆覆盖、聚氯乙烯薄膜覆盖、生物覆盖等。分析了农田覆盖技术的生态环境效应和经济效应,农田覆盖可提高土壤含水率,增加土壤耕层温度,改善土壤肥力状况,减少水土流失,促进作物生长,并指出生物覆盖、秸秆还田和聚氯乙烯薄膜覆盖技术在该区的应用前景。

According to the water and calorific condition on Loess Plateau and the research results obtained,differ-ent mulch types such as straw mulch, plastic film mulch, biological mulch, etc.,their environmental and economi-cal benefit of farmland mulch on Loess Plateau were introduced and the application prospect of farmland mulch on Loess Plateau was discussed. It was pointed out that the farmland mulch could raise soil moisture content,increase temperature of plough layer, improve soil fertility, reduce soil and water loss, and promote crop growth. It was put forward that biological mulch,plastic film mulch and straw or stubble mulch should be applied extensively on Loess Plateau.