Response of Soil Physical Properties to Soil and Water Conservation Measures in Gentle Sloping Land of Erosive Red Soil Region
Combined with long-term location test and indoor analysis, the soil physical properties such as soil bulk density , soil porosity, soil water retention, and soil aggregation degree in gentle sloping land of erosive red soil region under different soil and water conservation measures were studied , and the soil improvement effects of different soil and water conservation measures were analyzed.The results showed that different soil and water conservation measures all had a significant impact on soil bulk den-sity, soil water retention factors (maximum water retention, capillary water retention, and field water retention), wet-sieved ag-gregate composition, wet-sieved MWD (mean weight diameter), rate of structure deterioration, and aggregate stability of erosive red-soil sloping land, but they had no any significant impacts on soil porosity factors ( total porosity, capillary porosity, and non-capillary porosity) , soil dispersion rate, dry-sieved aggregate composition, and dry-sieved MWD.The forage grass planting measure could significantly reduce soil bulk density, rate of structure deterioration, and soil dispersion rate, and increase soil total porosity, all soil water retention factors, large aggregate (>0.25 mm) content, and aggregate stability, thus significantly improved soil physical properties.In the studied region, the soil water retention could be used as a simple indicator for the evaluation of soil fertility.
Red soil erosion regionSoil and water conservation measuresSoil physical properties
国家科技期刊平台
NSTL
万方数据
维普
