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研究了国家重点野外观测试验站——祁连山森林生态站排露沟流域土壤物理性质及其空间差异。结果表明:(1)土壤容重随深度而变化,变化幅度大小顺序为:山地栗钙土>山地森林灰褐土>亚高山灌丛草甸土,不同类型土壤容重变动在0.45～1.38g/cm3之间;(2)土壤总孔隙度大小顺序为:亚高山灌丛草甸土>山地森林灰褐土>山地栗钙土,不同植被下土壤总孔隙度表现出不同的差异;土壤毛管孔隙在不同植被下,各层之间无显著性差异;土壤非毛管孔隙,山地栗钙土与亚高山灌丛草甸土和山地森林灰褐土之间存在显著性差异(P<0.05)。(3)土壤最大持水量大小顺序为:山地森林灰褐土>亚高山灌丛草甸土>山地栗钙土;毛管持水量与含水量均表现出亚高山灌丛草甸土>山地森林灰褐土>山地栗钙土,各类型土壤含水量均随海拔的升高而增大。
This paper studied the soil physical properties and their spatial differences of the Paiguluo Valley, a national key field observation and test station. The results show that: (1) The bulk density of soil varies with depth, the order of variation is: mountain chestnut soil> mountain forest gray soil> subalpine shrub meadow soil. The variation of bulk density of different soil types is between 0.45 and 1.38g / cm3 (2) The order of soil total porosity is: subalpine shrub meadow soil> mountain forest gray soil> mountain chestnut soil, total soil porosity shows different differences under different vegetations; There was no significant difference among different layers under different vegetations. Soil non-capillary pores, mountain chestnut soil and subalpine shrub meadow soil and mountain forest gray-brown soil were significantly different (P <0.05). (3) The order of soil maximum water holding capacity is as follows: mountain forest gray-brown soil> sub-alpine shrub meadow soil> mountain chestnut soil; capillary water-holding capacity and water content all show subalpine shrub meadow soil> Cinnamon soil> Mountain chestnut soil, all kinds of soil moisture content increases with the elevation.