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利用江西大岗山 17～ 2 5年生杉木人工林的临时样地 (4 4块 )和固定样地 (52块 )材料 ,研究了立地、年龄和保留密度对杉木成材的影响。研究结果表明 :影响杉木中大径材成材的主要限制因子是立地 ,其次是保留密度和培育年限。立地指数级大于或等于 16 ,保留密度为 10 50～ 1350株·hm-2 ,年龄为 2 0～ 2 2 a时 ,适于培育中径材。大径材培育的经营密度则应更低 ,培育年限应更长
Based on the temporary plots (44 plots) and fixed plots (52 plots) from 17 to 25 years of Chinese fir plantation in Dagangshan, Jiangxi Province, the effects of site, age and reserve density on Chinese fir plantation were studied. The results show that the main limiting factors that affect the timber production of Chinese fir are standing site, followed by retention density and incubation period. Site index level greater than or equal to 16, the reserve density of 10 50 ~ 1350 plants · hm-2, the age of 20 ~ 22 a, suitable for cultivating medium diameter timber. Larger diameter timber cultivation business density should be lower, the incubation period should be longer