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在三峡库区消落带设置固定监测样地,研究消落带首次经历水库水位涨落后土壤氮磷钾含量、pH值和有机质含量的变化特征。结果表明:受三峡水库水位涨落影响,消落带0～10,10～20和20～30cm土层的速效氮含量下降41.53%～59.87%,速效磷含量下降5.26%～36.76%,速效钾含量下降3.55%～45.56%,全氮含量下降9.52%～40.00%,土壤有机质含量下降7.62%～37.83%,全磷和全钾含量基本上没有变化,土壤pH值略有变化,变幅为1.73%～9.58%。
The fixed monitoring plots were set up in the fluctuation zone of the Three Gorges Reservoir. The change characteristics of soil N, P, K content, pH value and organic matter content in the first time after the water level fluctuation of the water level fluctuation zone were studied. The results showed that available nitrogen content decreased by 41.53% -59.87%, available phosphorus content decreased by 5.26% -36.76% in 0 ~ 10, 10 ~ 20 and 20 ~ 30cm soil layer in the fluctuation zone, The content of total organic matter decreased by 3.55% -45.56%, the content of total nitrogen decreased by 9.52% -40.00%, the content of soil organic matter decreased by 7.62% -37.83%, the content of total phosphorus and total potassium remained unchanged, the pH value of soil slightly changed by 1.73 % ~ 9.58%.