免耕对土壤水分影响的研究

Effect of Non-tillage on Soil Water

针对黑龙江省作物生长季节经常出现干旱的问题．研究了免耕不同耕作方式对玉米土壤水分的影响，为黑龙江省采用免耕耕作方式提供了理论依据，为旱作条件下发展免耕技术奠定基础。结果表明：秸秆覆盖在整个玉米生长发育过程中耕层土壤含水量比传统耕作提高0．58％～4．76％，平作土壤含水量高于垄作。覆盖处理（包括WN和NTS）能够有效抑制土壤水分的蒸发，提高土壤蓄水能力；在0～20cm土层内覆盖处理的土壤含水量均高于无秸秆处理．

Effect of different tillage patterns on soil growth stage in Heilongjiang. It provided the basis water was studied considering the drought during for developing the technology of non--tillage under the condition of Heilongjiang province. The results showed： During the whole maize development, the soil water content in plough layer by cover residue increased by 0. 58%-4.76% compared to conventional tillage. Soil water content by flatten culture was higher than by ridge culture, Covering treatments （including WN and NTS） could effectively restrain soil water transpiration and increase soil water capacity. In 0-20 cm layer the soil water content by CS and covering treatments, were both higher than by non-residue treatment.