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2009年5月、7月和9月对小江流域上游至下游消落区的5个断面的土壤理化性状进行监测。结果表明,土壤容重、孔隙度、pH、有机质、全氮和全磷的总体平均值分别为1.47g/cm3、45%、7.33、16.42g/kg、0.79g/kg和0.59g/kg,变化范围分别为1.15～1.68g/cm3、37.0%～61.0%、4.04～8.72、6.64～35.69g/kg、0.40～1.42g/kg和0.36～0.94g/kg。高程150m处的土壤容重均值在7月下降、9月增加,160m处的土壤容重均值在7月增加较多,9月变化不大;不同高程处的孔隙度均值变化与土壤容重变化呈相反的变化趋势;高程160m处土壤有机质在7月有所下降,9月变化不大;各高程土壤全氮和全磷总体呈7月升高、9月下降趋势。并对消落区土壤理化性状变化的影响因素进行了初步分析。
In May, July and September 2009, soil physical and chemical properties of 5 sections in the upper and lower reaches of the Xiaojiang River basin were monitored. The results showed that the overall average values of soil bulk density, porosity, pH, organic matter, total nitrogen and total phosphorus were 1.47g / cm3,45%, 7.33,16.42g / kg, 0.79g / kg and 0.59g / kg, respectively Ranging from 1.15 to 1.68 g / cm3, 37.0% to 61.0%, 4.04 to 8.72, 6.64 to 35.69 g / kg, 0.40 to 1.42 g / kg, and 0.36 to 0.94 g / kg, respectively. The mean value of soil bulk density at elevation 150m decreased in July and increased in September. The average value of soil bulk density at 160m increased more in July and changed little in September. The mean value of porosity at different elevation changed inversely with the change of soil bulk density Soil organic matter in 160 m elevation decreased in July and little changed in September. Total nitrogen and total phosphorus in all elevation soils increased in July and decreased in September. The influencing factors of soil physical and chemical properties in the water level fluctuation zone were analyzed.