柑橘地土壤大孔隙与优先流的关系研究  

Relationship Between Soil Macropore and Preferential Flow in Citrus Graden

作　　者：孙龙[1] 张洪江[1] 程金花[1] 王彬俨[1] 陆晓宇[1] 王贤[1] 

机构地区：[1]北京林业大学水土保持学院,北京100083

出　　处：《水土保持通报》2012年第6期75-79,共5页Bulletin of Soil and Water Conservation

基　　金：国家"十二五"科技支撑计划"三峡库区典型区段长防林建设及质量调控技术"(2011BAD38B0403);国家自然科学基金项目(30900866);中央高校基本科研业务费专项(TD2011-2)

摘　　要：以重庆市江津区10和20a林龄的柑橘地为研究对象,应用优先流染色法和室内图像提取技术,土壤水分穿透曲线及Poiseulle方程综合分析土壤大孔隙与优先流的关系。结果表明,大孔隙使染色区的水分渗透速率较非染色区提高了1.48倍以上。柑橘地大孔隙孔径范围在0.3～1.7mm,半径大于0.7mm的土壤大孔隙是形成优先流路径的主要孔径范围。The relationship between soil macropore and preferential flow was analyzed in different citrus land in Jiangjin District of Chongqing City using brilliant blue dye method with image processing techniques,water breakthrough curve,and the Poiseulle equation.The results showed that the steady effluent rate of the dye-stained area was 1.48 times higher than that of the dye-unstained area.The radii of soil macropores ranged from 0.3 mm to 1.7 mm.The path of preferential flows were mainly found in the macropores with radii larger than 0.7 mm.

关 键 词：柑橘地 大孔隙 优先流 

分 类 号：S157[农业科学—土壤学] S152.5[农业科学—农业基础科学]