【摘要】 选择土壤p H值、碳酸钙质量分数、有机质质量分数、速效磷质量浓度、含水率等5项具有代表性的土壤理化性质指标,研究了甘肃省武都区构林坪泥石流沟土壤理化性质.结果表明:该流域海拔1 800 m以上区域,林地土壤的p H值、碳酸钙质量分数、有机质质量分数和含水率均高于耕地和草地的;土壤的速效磷质量浓度耕地高于草地和林地的.海拔1 301～1 800 m区域,林地土壤的p H值、碳酸钙质量分数、有机质质量分数有所下降,但依然高于草地和耕地的;土壤含水率草地的最高,土壤速效磷质量浓度则是耕地的最高.海拔1 300 m以下地区,耕地土壤的p H值、碳酸钙质量分数、速效磷质量浓度、有机质质量分数和含水率都高于草地和林地的.从整体上看,构林坪泥石流沟的林地土壤理化性质优于草地和耕地的.对同一土地利用类型,母质为石灰岩的土壤理化性质优于母质为千枚岩的,阴坡土壤理化性质优于阳坡的.更多还原

【Abstract】 Five representative soil physicochemical indicators, including the p H, calcium carbonate, organic matter content, moisture content and soil available phosphorus content, were selected as the research objects to study soil physicochemical properties of Goulinping debris flow gully in Bailongjiang Watershed. The results showed that in areas at altitudes higher than 1 800 m, the p H, calcium carbonate, organic matter content and moisture content of forest land soil were higher than those of the cropland and grazing land; soil available phosphorus content of cropland was higher than that of the grazing land and forest land. In areas at altitude ranging from 1 301 to 1 800 m, the soil p H, calcium carbonate and organic matter content of forest land decreased but were still higher than that of the grazing land and cropland; the soil moisture of grazing land was the highest,while the soil available phosphorus of the cropland was the highest. In areas at altitudes lower than 1 300 m, the soil p H, calcium carbonate, available phosphorus, organic matter content and moisture content of the cropland were higher than those of the grazing land and forest land. The physicochemical properties of forest land soil were better than grazing land and cropland and, with the same land use type of soil, the physicochemical properties of shady soil were better than the sunny soil and the physicochemical properties of soils whose parent material is limestone were better than the parent material of phyllite.更多还原