豫西坡耕地不同耕作方式麦田水分动态及其生态效益

研究了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 ,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 ,比传统耕作增产 1 9.3 % ,水分利用率提高 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 ,产量比传统耕作提高 9.4% ,水分利用率提高 8.5 %。

Sudy of Water Dynamics and Ecological Benefit with Different Tillage Practice in Winter Wheat Sloping Land in West of He'nan

Water dynamics and ecological benefit with different tillage practice in winter wheat sloping land were studied in summer fallow of west of He''nan province,the results showed that the soil water content and conserving of no-til and subsoiling were an obvious improvement,their soil water content efficinecies have been increased by 13.33% and 5.84%,respectively,comparing to that of the conventional tillage. The no-til and subsoiling have equal distribution of precipitation in the sloping land,the no-til 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 9.4%,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.