并分别立地类型、造林密度、林分年龄对这些指标的影响进行了研究。

And the effects of the site type, silviculture density and stand age on the above indexes are studied.

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选择林分密度指数(SDI)作为反映林分中林木之间平均拥挤指标。

Stand density index (SDI) was applied as a quantitative index to measure mean crowd degree between trees.

youdao

选择林分密度指数(SDI)作为反映林分中林木之间平均拥挤指标。

Stand density index (SDI) was applied as a quantitative index to measure mean crowd degree between trees.

youdao