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通过在南平溪后安曹下的杂木林、1代、2代及 3代杉木人工林中设立标准地 ,对杉木林取代杂木林后及随杉木多代连栽土壤水分和养分的变化进行研究 ,结果表明 :随着杉木林取代杂木林及连续栽植代数的增加 ,土壤保水和供水能力下降 ,土壤大部分全量养分含量减少 ,土壤供肥和保肥能力下降 ,导致杉木林分生产力下降 ,这是杉木连栽后土壤衰退的重要特征之一
Through the establishment of standard plots in the mixed forest of Ancao under the Nanping River and the 1st, 2nd, and 3rd generations of Chinese fir plantation, the changes of soil moisture and nutrients of Chinese fir plantation after replacing the mixed plantation with continuous generations of Cunninghamia lanceolata were studied The results showed that with the increase of substitution of Chinese fir plantation and continuous planting algebra, the capacity of water conservation and water supply decreased, most of the total nutrient content of soil decreased, and the soil fertility and fertilizer holding ability decreased, which led to the decline of productivity of Chinese fir plantation It is one of the important characteristics of soil decay after continuous planting of Chinese fir