文献类型：期刊文献

中文题名：六盘山典型植被下土壤大孔隙特征

英文题名：Soil macropore characteristics under typical vegetations in Liupan Mountains.

作者：时忠杰[1,2] 王彦辉[3] 徐丽宏[3] 于澎涛[3] 熊伟[3] 徐大平[1]

机构：[1]中国林业科学研究院热带林业研究所;[2]中国林业科学研究院森林生态环境与保护研究所,北京100091;[3]中国林业科学研究院森林生态环境与保护研究所

年份：2007

卷号：18

期号：12

起止页码：2675-2680

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：MEDLINE(收录号：18333438);CSTPCD;;Scopus(收录号：2-s2.0-38949211454);北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；PubMed;

基金：国家重点基础研究发展规划项目(2002CB111501);国家科技部"十一五"科技支撑计划项目(2006BAD03A1803);国家林业局引进国际先进技术项目(2003-4-43);国家科技部社会公益研究专项(2004DIB3J102);国家林业局森林生态环境重点试验室联合资助项目.

语种：中文

中文关键词：土壤大孔隙;半径;密度;Poiseuille方程;六盘山

外文关键词：soil macropore ; radius ; density; Poiseuille equation ; Liupan Mountains

分类号：S714.2

摘要：利用水分穿透曲线法和Poiseuille方程研究了六盘山8种典型植被类型下土壤大孔隙的半径与密度特征．结果表明：研究区典型植被下土壤大孔隙半径在0．4～2．3mm，加权平均半径为0．57～1．21mm，平均值为0．89mm；大孔隙密度变化范围为57～1117个·dm^-2，平均408个·dm^-2；半径〉1．4mm的大孔隙密度较小，其数量仅占大孔隙总数量的6．86％；大孔隙面积与土柱水分出流面积的百分比（简称土壤大孔隙面积比）介于0．76％～31．26％，平均为10．82％．研究区土壤大孔隙密度为阔叶林大于针叶林，亚高山草甸与阔叶林相当，灌丛与针叶林相当；土壤大孔隙面积比为阔叶林高于针叶林，灌丛与阔叶林相当，亚高山草甸与针叶林相当．
The radius and density of soil macropores under eight typical vegetations in Liupan Mountains of Northwest China were studied by using water breakthrough curves and Poiseuille equation. The results indicated that the radii of soil macropores ranged from 0.4 mm to 2. 3 mm, and the weighted mean radii ranged from 0. 57 mm to 1.21 mm, with a mean of 0. 89 mm. The density of soil macropores ranged from 57 individuals per dm^2 to 1 117 individuals per dm2, with a mean of 408 individuals per dm^2. The macropores with radii bigger than 1.4 mm had a lower density, accounting for only 6. 86% of the total. The area proportion of soil macropores ranged from 0. 76% to 31.26%, with a mean of 10. 82%. In study area, the density of soil macropores was higher in broadleaf forest than in coniferous forest, but basically the same in sub-alpine meadow and in broadleaf forest, as well as in shrubs and in coniferous forest. As for the area proportion of soil macropores, it was also higher in broadleaf forest than in coniferous forest, but basically the same in shrubs and in broadleaf forest soil, as well as in sub-alpine meadow and in coniferous forest.