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研究表明 ,杉木迹地上改植的秃杉树高年生长量比连栽杉木大14 8 0 %～ 2 0 2 1% ,地径年生长量比连栽杉木大 2 81 3%～ 343 8% ,差异比较显著。由于连栽杉木 0～ 4 0cm土层的土壤容重增加 2 2 2 % ,毛管孔隙、毛管含水量和自然含水量分别下降 2 6 1%、6 45%和 9 58% ;土壤pH值增加 5 79% ,全N、有效P、速效K和有机质分别下降 8 45%、7 2 6 %、2 1 37%和 12 2 6 % ;杉木采伐迹地营造秃杉比较适应 ,不宜连作杉木
The results showed that the annual growth of bald fir trees planted on the Chinese fir land was 1480% to 2021% higher than that of the continuous plantation, and the annual growth of diameter was 2 81 3% to 343 8% , The difference is more significant. As the soil bulk density of 0 ~ 40cm soil layer in continuous plantation increased by 22.2%, capillary porosity, capillary water content and natural water content decreased by 21.6%, 45.5% and 95%, respectively. Soil pH increased by 5% %, Total N, available P, available K and organic matter decreased by 8 45%, 72 6%, 21 37% and 12 2 6%, respectively.