不同覆盖方式对土壤水分分布的影响  

Effects of Different Covering Methods on Soil Water Distribution

作　　者：侯连涛[1] 焦念元[1] 韩宾[1] 江晓东[1] 李增嘉[1] 

机构地区：[1]山东农业大学农学院山东省作物生物学重点实验室,山东泰安271018

出　　处：《灌溉排水学报》2007年第1期47-50,共4页Journal of Irrigation and Drainage

基　　金：国家粮食丰产工程(2004BA520A14C10);山东省财政厅财政支农项目(2004-2006)

摘　　要：在位于典型半湿润灌区的山东农业大学农业生态实验站研究了冬小麦秸秆覆盖与起垄覆膜沟内播种(膜垄)2种覆盖模式的土壤水分时空动态变化。结果表明,秸秆覆盖能有效提高冬小麦30 cm以下土壤含水率,膜垄对0-30 cm土壤含水率的提高贡献最大。进入拔节期后,随着冬小麦生育进程的推进,膜垄在30-120 cm土层含水率降幅较大,形成一个水分亏缺带,而秸秆覆盖在该土层的含水率一直较高。该试验表明,膜垄在保水保墒和土壤水分垂直分布方面表现出与秸秆覆盖完全不同的特点。A field experiment was conducted for winter wheat （Triticum aestivum L. ） during the period 2004-2005 at Shandong Agricultural University NCP to find differences in distribution of soil water between straw mulch and ridge covered with plastic film. The results showed straw mulch improved soil water conservation efficiently below 30 cm layers and ridge covered with plastic film made a maximum contribution to 0-30 cm soil water content. After jointing stage and along with the development progress, ridge covered with plastic film appeared a water deficit zone in 30-120 cm layers, but the soil content of straw mulch is always high in this layer. The dispersions of water storage between two treatments are 60.3 mm （no irrigation） and 13.2 mm（irrigation twice）. The experiment also showed that straw mulch and ridge covered with plastic film were different in the soil water conservation and vertical distribution.

关 键 词：半湿润灌区 秸秆覆盖 膜垄 土壤水分 

分 类 号：S152.7[农业科学—土壤学]