水杉造林密度试验

为水杉造林选择造林密度,提供参考依据。通过研究水杉不同造林密度对林分活立木总蓄积和经济效益的影响,本次试验设置了A水平:2.0m×2.0m,B水平:2.0m×2.5 m,C水平:2.0m×3.0m,3个规格,隔离带造林密度为3.0m×3.0m。通过这3个不同的造林密度水平试验,结果表明:造林密度的大小随着林龄增大对立木材积的影响变小,对经济效益的影响则变大。

Test on Planting Density of Metasequoia glyptostostroboides Huet cheng

In order to select afforestation density of Metasequoia glyptostostroboides Huet cheng and provide reference basis,Three of A level of 2.0 m×2.0 m,B level of 2.0 m×2.5 m,C level of 2.0 m×3.0 m are set.the afforestation density of isolated grassland is 3.0 m×3.0 m by studying live standing the total accumulation of different afforestation density and economic benefit.Using those three levels the results showed that afforestation density became lager,little influence on the tree volume with stand age increase.Conversely,the great influence on economic benefit.