保持耕作麦田水分动态及水土流失的研究

通过对豫西夏休闲坡耕地不同耕作方式下冬小麦田水分变化规律及其生态效益的研究 ,结果表明 :免耕、深松的土体内含水量、接纳降水能力均明显高于传统耕作 ,免耕与深松处理降水贮蓄率分别比传统高 1 3 .3 3 %和 5 .84% ,能促使降水在不同坡位中均匀分布 ,其中免耕优于深松。免耕条件下 ,提高了冬小麦出苗率 ,明显地促进生长发育 ,产量比传统耕作增产了1 9.3 % ,水分利用效率也提高了 1 7.5 % ;深松也提高了冬小麦出苗率 ,但对冬小麦生长发育影响不明显 ,产量比传统耕作增产了 9.4% ,水分利用效率提高了 8.5 %。

Study of Water Dynamics and Water and Soil loss with Different Tillage Practices in Winter Wheat Sloping Land

Water dynamics and ecological benefit with different tillage practices in winter wheat sloping land were studied in summer fallow of west of Henan province, the result showed that the soil water content and conserving of no-till and subsoiling were an obvious improvement, their soil water conserving efficiencies have been increased by 13.33% and 5.84%, respectively, comparing to that of the conventional tillage. The no-till and subsoiling have equal distribution of precipitation in the sloping land, the no-till is better than the subsoiling. The rate of winter wheat germination is improved and the plant obviously grows better with the no-till. The yield and water use efficiency were increased by 19.3% and 17.5%, respectively, comparing to that of the conventional tillage. In the same time, the rate of the winter wheat germination is also improved with the subsoiling. But the wheat growth has not been obvious effect .The yield and water use efficiency was increased by 9.4% and 8.5%, respectively, comparing to that of the conventional tillage.