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当前位置: 首页 > 文章 > 祁连山青海云杉林不同海拔梯度土壤水分动态变化 湖北农业科学 2009,48 (5) 1107-1111
Position: Home > Articles > Research on Soil Water Dynamics along an Elevation Gradient in Picea crassifolia Forestry Lands in Qilian Mountains Hubei Agricultural Sciences 2009,48 (5) 1107-1111

祁连山青海云杉林不同海拔梯度土壤水分动态变化

作  者：
张涛;车克钧;王辉
单  位：
甘肃农业大学林学院
关键词：
祁连山;青海云杉;海拔梯度;土壤水分动态
摘  要：
通过对祁连山排露沟小流域土壤水分动态的长期定位观察,比较分析了不同海拔青海云杉林地土壤不同深度的含水量变化。结果表明,不同海拔青海云杉林地异质性不同,海拔2 700 m青海云杉林地土壤含水量时间异质性>2 900 m青海云杉林>3 100 m青海云杉林>3 300 m青海云杉林(变异系数分别为23.38%、13.64%、10.49%、9.05%);不同海拔青海云杉林地土壤水分随土壤剖面深度的增加呈不同程度的降低趋势,土壤含水量变异系数随土壤深度有递减的趋势,在苔枯层和0～10cm的土层范围内,土壤含水量的变异系数最高而且较为集中;相同土壤层次土壤含水量随海拔升高递增,3 300 m处年平均土壤含水量是2 700 m处的2.6倍;土壤持水量的动态变化与土壤水分动态变化基本一致,相同土壤层次土壤持水量随海拔升高递增,80 cm以上土层持水量以3 300 m海拔最高,为279.56±56.03 mm(平均值±标准差),其他依次为3 100 m海拔(278.89±44.34 mm)、2 900 m海拔(214.71±37.77 mm)、2 700 m海拔(118.21±21.24 mm)。
译  名：
Research on Soil Water Dynamics along an Elevation Gradient in Picea crassifolia Forestry Lands in Qilian Mountains
作  者：
ZHANG Tao1,CHE Ke-jun1,2,WANG Hui1(1.Forestry College,Gansu Agricultural University,Lanzhou 730070,China;2.Bailongjiang Forestry Administration Bureau,Lanzhou,730050,China)
关键词：
Qilian mountains;Picea crassifolia;elevation gradient;soil water dynamics
摘  要：
The soil water dynamics was studied along different elevation in Picea crassifolia forestry lands in Qilian Mountains.The results showed that temporal heterogeneity of soil water at different elevation was different,the order of temporal heterogeneity was elevation 2 700m>2 900m>3 100m>3 300m(The coefficient of variation(CV) was 23.38%、13.64%、10.49%、 9.05% respectively).Both soil water and CV was depressed to a extent with increase of soil depth at different elevation.The CV was not only maximal but relatively mass at deadwood layer and in the range of 0～10cm soil depth.The soil water was increased in same soil layer with increase of elevation,and the average soil water of elevation 3 300 m was 2.6 times compared with elevation 2 700m.The amount of stored water was increased in same soil layer with increase of elevation,and the maximal value(279.56±56.03mm) was at elevation 3 300 m,the second one(214.71±37.77mm) was at 3 100 m.At 2 900 m and 2 700 m,the values were 214.71±37.77mm,118.21±21.24mm in turn.

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