沙地樟子松人工林初植密度及其调控研究
Study on the initial planting density and its adjustment of Pinus sylvestris var. mongolica Litvin. artificial forest in the sand land
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摘要: 利用灰色系统理论中灰关联和灰预测方法，对毛乌素沙地试区樟子松人工林初植密度和中龄期(15～20年)的适宜密度调控进行了评价与预测。研究结果证明沙地樟子松适宜的初植株行距为2m×2m，进入中龄期后适宜的株行距为3m×4m。Abstract: This paper has evaluated the initial planting density and calculated suitable densities of the middle age Pinus sylvestris var. mongolica Litvin. artificial forest in Maowusu sand land. Using the gray system theory calculation,it is shown that suitable initial planting density of Pinus sylvestris var. mongolica Litvin. forest in sand land is 2m×2m(space).According to calculation result, meanwhile, the suitable density for middle age Pinus sylvestris var. mongolica Litvin. artificial forest in sand land is 3m×4m(space).
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Key words:
- Sand land /
- Gray system /
- Initial planting density /
- Middle-age forest
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