皇甫川流域砒砂岩及栗钙土的土壤水分特征

Characteristics of Soil Moisture of Feldsparthic Sandstone and Chestnut Soil of the Huangpuchuan River Basin

为探讨砒砂岩的可利用性,对皇甫川流域广泛分布的砒砂岩和以砒砂岩为母质发育的栗钙土的水分特征曲线进行了测定和分析,结果表明:栗钙土具有较好的透水性和持水性;紫红色砒砂岩的透水性与持水性比栗钙土好;白色砒砂岩的透水性和持水性相对较差。大部分砒砂岩由白色砒砂岩和紫红色砒砂岩互层组成,紫红色砒砂岩层贮水多,白色砒砂岩层贮水少,两类岩层成为相对的隔水层和贮水层;紫红色砒砂岩质地疏松、黏粒含量较高,保水性能好,可为植物生长提供较好的水分条件,具有一定的可利用前景。

The paper surveys, determines and analyzes the moisture characteristic curve of feldsparthic sandstone which is widely distributed in the Huangpuchuan River basin and chestnut soil that takes feldsparthic sandstone as mother develop ment for approaching the usability of feldsparthic sandstone. The results show that the chestnut soil has fairly good water permeability and retentiveness; the water permeability and retentiveness of purplish red feldsparthic sandstone are better than that of chestnut soil and; the water permeability and retentiveness of white feldsparthic sandstone are relatively poor. The greater part of feldsparthic sandstone composes of interbedding of white and purplish red feldsparthic sandstone. The purplish red feldsparthic sandstone can store more water than that of the white ones. The types of rock stratum become relative an impermeable strata and a water storage strata. The texture of purplish red feldsparthic sandstone is loose, higher clay content, better water retentiveness and can provide better moisture conditions for the growth of plants and has a certain usable prospects.