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六盘山典型植被下土壤大孔隙特征
引用本文:时忠杰,王彦辉,徐丽宏,于澎涛,熊伟,徐大平.六盘山典型植被下土壤大孔隙特征[J].应用生态学报,2007,18(12):2675-2680.
作者姓名:时忠杰  王彦辉  徐丽宏  于澎涛  熊伟  徐大平
作者单位:1. 中国林业科学研究院热带林业研究所,广州,510520;中国林业科学研究院森林生态环境与保护研究所,北京,100091
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热带林业研究所,广州,510520
基金项目:国家重点基础研究发展计划(973计划);国家科技部科技支撑计划项目;引进国际先进农业科技计划(948计划);科技部社会公益研究项目;林业部重点实验室基金
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0.4~2.3 mm,加权平均半径为0.57~1.21 mm,平均值为0.89 mm;大孔隙密度变化范围为57~1117个.dm-2,平均408个.dm-2;半径>1.4 mm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.

关 键 词:土壤大孔隙  半径  密度  Poiseuille方程  六盘山
文章编号:1001-9332(2007)12-2675-06
收稿时间:2006-12-21
修稿时间:2007-09-18

Soil macropore characteristics under typical vegetations in Liupan Mountains
SHI Zhong-jie,WANG Yan-hui,XU Li-hong,YU Peng-tao,XIONG Wei,XU Da-ping.Soil macropore characteristics under typical vegetations in Liupan Mountains[J].Chinese Journal of Applied Ecology,2007,18(12):2675-2680.
Authors:SHI Zhong-jie  WANG Yan-hui  XU Li-hong  YU Peng-tao  XIONG Wei  XU Da-ping
Institution:Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, China. shijie1204@163.com
Abstract: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 dm2 to 1 117 individuals per dm2,with a mean of 408 individuals per dm2.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.
Keywords:soil macropore  radius  density  Poiseuille equation  Liupan Mountains
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