微集水种植对北方旱区土壤水分分布影响

Effect of micro-catchment cultivation on the dry land soil water distribution in north China

与传统耕作种植相比,微集水种植技术能够让水分更好的向土壤内渗透,改变土壤水分分布,提高土壤水分含量。不同的微集水种植技术的蓄水保墒效果不同,垄上覆膜沟内覆盖秸秆处理的蓄水保墒效果最好,该处理的集水构造不但能使降水更好的向土层深处渗透,而且秸秆覆盖处理还能减少土壤表层水分的无效蒸散,提高土壤蓄水量。

Compared with conventional tillage planting,water penetrate into the soil better in micro-catchment,it can change the soil moisture distribution and also improve soil moisture content.Different micro-catchment has different impoundment effect,and the best effect shows when the film mulching on the ridge is covered with straw.The above catchment structure will not only help water to better penetrate into deeper soil,the straw coverage can also reduce the invalid evapotranspiration of the surface soil and improve the water storage capacity of the soil.