不同灌溉方式对保护地土壤水稳性团聚体的影响  

Effect on Soil Water-Stable Aggregates of Different Irrigation Methods in Protected Field

作　　者：袁德玲[1] 张玉龙[1] 唐首锋[1] 任秉枢[1] 魏巍[1] 

机构地区：[1]沈阳农业大学土地与环境学院/农业部东北土壤与环境重点开放实验室,辽宁沈阳110161

出　　处：《水土保持学报》2009年第3期125-128,134,共5页Journal of Soil and Water Conservation

基　　金：辽宁省农业重大攻关项目(20080112-311)

摘　　要：以相同方案在同一地块连续10年进行节水灌溉试验研究为基础,通过测定渗灌、滴灌和沟灌3种灌溉方法长期灌溉保护地土壤水稳性结构的变化,探讨了灌溉方法对土壤结构性的影响。结果表明:(1)滴灌能够提高0-15 cm土层土壤水稳性团聚体的含量和大小;渗灌则能够提高15-45 cm土层土壤水稳性团聚体的含量和大小。(2)土壤水稳性团聚体的含量(WSA)和平均重量直径(MWD)随土壤有机质含量的增高而增大。(3)从土壤团聚体角度考虑,保护地应优先选择滴灌,其次是渗灌。The experiment of different irrigation methods include furrow irrigation, drip irrigation and subsurface irrigation was conducted for 10 consecutive years, and soils were sampled from the field, and determined transformation of soil water-stable aggregates, and explained the effect on soil structure property of different irrigation methods. The results indicated that, （1） At 0 to 15 cm soil layer, drip irrigation could increased the quantity and size of soil water-stable aggregates; （2） Mean weight diameter of soil water-stable aggregates was bigger with higher contents of soil organic matter. （3）From the viewpoint of soil aggregates, in protected field drip irrigation was given first priority to use, subsurface irrigation was second.

关 键 词：灌溉方式 水稳性团聚体 平均重量直径 

分 类 号：S152.4[农业科学—土壤学]