液态地膜覆盖对土壤水分有效性的影响  

Effects of hydromulching on soil water availability.

作　　者：尹光华[1] 郝亮[1,2] 赵永红[3] 谷健[1] 刘作新[1] 

机构地区：[1]中国科学院沈阳应用生态研究所,辽宁省节水农业重点实验室,沈阳110016 [2]中国科学院大学,北京100049 [3]辽宁省农业对外经济技术合作中心,沈阳110001

出　　处：《生态学杂志》2013年第6期1405-1411,共7页Chinese Journal of Ecology

基　　金：国家科技支撑计划专题(2012BAD09B02-02和2012AA101404-10);国家行业(农业)专题项目(200903001-06-7)资助

摘　　要：采用田间微区试验方式,观测和分析了液膜地表覆盖下土壤含水量、花生植株伸长速率、叶面积指数、叶片光合速率、水分利用效率及产量等指标,并利用隶属函数法进行数值转换后,对液膜覆盖的土壤水分有效性进行了分析。结果表明,液膜覆盖提高土壤含水量103%～167%,且随液膜浓度的增大有效性提高;不同土层间,花生耗水量差异显著,其中以土层深度为20～40cm差异最大;液膜覆盖也明显提高了光合速率,增幅为1.9%～15.6%;叶面积指数提高0.3%～26.4%,改善了植株光合形态。综合全部指标表明,液膜类型为3号,液膜浓度为高水平时,覆盖效应最为明显。A Field micro-plot experiment with peanut was conducted to study the soil water con- tent, plant elongation rate, leaf area index, photosynthetic rate, water use efficiency, and eco- nomic yield under hydromulching. By using subordinate function, the soil water availability was analyzed. Hydromulching increased the soil water content by 103% -167%, and improved the soil water availability. The peanut water consumption differed significantly with soil layer, being the greatest for 20-40 cm soil layer. Under hydromulching, the photosynthetic rate increased by 1.9% -15.6%, leaf area index raised by 0.3% -26.4%, and plant morphology was improved. In considering all indices, high concentration of hydromulching type 3 had the most obvious effect.

关 键 词：液态地膜 土壤含水量 土壤水分有效性 隶属函数 

分 类 号：S152.7[农业科学—土壤学]