三峡库区消落带云阳段土壤理化性质分析

为了探讨三峡库区消落带土壤理化性质分布特征，对三峡库区消落带云阳段不同高程土壤的部分理化 指标进行测定和分析。结果表明院研究区域内土壤pH 值介于5~6 之间，呈弱酸性，为酸性紫色土；氧化还原电位均低 于200 mV，不利于植被生长；土壤的电导率介于0.2~0.5 ms/cm 之间，电导率和含水率均有随高程增加而逐渐降低的 趋势；表层土壤的有机质含量介于29.92~111.77 g/kg 之间，均值为79.40 g/kg，总磷含量介于0.2985~0.6623 g/kg，均 值为0.4782g/kg，其含量均有随高程增加逐渐增加的趋势；表层土壤总氮含量介于0.0540%~0.1605%之间，均值为 0.010%，其含量有随高程增加而逐渐降低的趋势。

Analysis on soil physico-chemical properties of fluctuation zone of Three Gorges reservoir area in Yunyang

In order to investigate the distribution of soil physico-chemical properties of fluctuation zone of Three Gorges reservoir area, several soil physico-chemical properties were performed under different elevation group in Yun Yang. The result showed that pH value of the sampling soil was 5-6, so the soil was weakly acidic, called acid purple soil. Oxiclation-reduction potential (ORP) of the sampling soil was below 200 mV, and the soil was not conducive to the growth of plants. Electrical conductivity of sampling soil was 0.2-0.5 ms/cm. Electrical conductivity and moisture content reduced gradually with the elevation increasing. The content of organic matter of surface soil was 29.92 -111.77 g/kg and the average was 79.40g/kg. The content of total phosphorus (TP) of surface soil was 0.2985-0.6623 g/kg and the average was 0.4782 g/kg. The content of organic matter and TP increased gradually with the increase of elevation. The content of total nitrogeh (TN) of surface soil was 0.0540%-0.1605%, and the average was 0.010%. The content of TN decreased gradually with the increase of elevation.