毛乌素沙地不同林龄杨柴灌木林土壤剖面水分变化特征  

Variation Characteristics of Soil Profile Moisture of Hedysarum laeve Shrubs at Different Stand Ages in Maowusu Sandy Land

作　　者：洪光宇[1] 王晓江[1] 张雷[1] 李卓凡[1] 高孝威[1] 武永智[1] 王平平[1] HONG Guang -yu WANG Xiao -jiang ZHANG Lei LI Zhuo -fan GAO Xiao - wei WU Yong - zhi WANG Ping - ping(Inner Mongolia Academy of Forestry Sciences, Hohhot 010010, China)

机构地区：[1]内蒙古自治区林业科学研究院,内蒙古呼和浩特010010

出　　处：《内蒙古林业科技》2016年第4期6-9,共4页Journal of Inner Mongolia Forestry Science and Technology

基　　金：内蒙古自治区自然科学基金项目(2014MS0313);国家林业公益性行业科研专项(201304206)资助

摘　　要：以毛乌素沙地不同林龄杨柴灌木林为研究对象，采用TRIME—TDR土壤水分测定系统，测定了不同林龄杨柴灌木林的土壤体积含水量，分析了其空间变化特征。结果表明：（1）在0—180am范围内，林龄为38年的样地土壤体积含水量显著高于30年和15年样地，30年和15年样地差异不显著。（2）随着土层深度的增加，林龄为38年和30年的样地土壤体积含水量分别在80—100cm和20-40cm间达到最大值，为8．21％和7．85％，15年样地则呈现降低的趋势。土壤体积含水量最大值随着林龄的增加有向深层次运移的趋势，并且最小值均出现在140～180cm范围内。（3）随着杨柴灌木林林龄的增加，0—20cm土壤层水分呈现减小趋势，20～100cm土壤层水分基本呈现增大趋势，100—180cm土壤层水分出现先减小后增大的趋势。Taking Hedysarum laeve shrubs at different stand ages in Maowusu Sandy Land as the study object, using the TRIME -TDR moisture measurement system, soil volumetric moisture content of Hedysarum laeve shrubs at dif- ferent stand ages has been measured, and its spatial variation characteristics have been analyzed. The results show that： （ 1 ） Within the scope of the 0 - 180 cm, soil volumetric moisture content of 38 a plot was significantly higher than the one in 30 a and 15 a plot, and there was no significant difference between 30 a and 15 a. （2） With the increase of soil layer depth, soil volumetric moisture content of 38 a and 30 a plots between 80 ~ 100 cm and 20 40 cm reached the maximum value of 8.21% and 7.85%, and 15 a plot showed a tendency of decrease. With the increase of stand ages, the maximum soil volumetric moisture content had the trend of deeper development, and the minimum value appeared at the range of 140 - 180 cm. （3） With the increase of stand age, within the scope of the 0 - 20 cm, soil volumetric moisture content showed the tendency of decrease. Within the scope of the 20 ~ 100 cm, soil volumetric moisture content showed the tendency of increase. And within the scope of the 100 ~ 180 cm, soil volumetric moisture content showed the trend of firstly decrease and then increase.

关 键 词：杨柴 土壤体积含水量 垂直变化 土层深度 毛乌素沙地 

分 类 号：S152.7[农业科学—土壤学]