S tands of 1 year -old DH32-29 eucalypt clone with nine different densities for energy -forest were investigated. Growth, biomass and calorific value of different organs from their stands were analyzed. The results showed that the effect of density on height and stem base diameter was obvious; the biomass of leaf and stem was decreased as the stand density increased. The individual plant biomass was decreased with density increasing while the stand biomass was on the contrary. The individual average GCV and ash contents among the densities of M156, M254, M204, and M154 had no significant difference. However as the stand density increased, the differences of individual ash contents and GCV between stands with high density and low density reached significant level. Through principal component analysis, four densities were chosen to be the suitalble for the energy-forest which were M202, M152, M154 and M252.%对1年生9种不同初植密度的尾巨桉优良无性系DH32-29的生物量、热值以及灰分进行测定分析.结果表明:9种不同密度桉树能源林平均树高、基茎差异显著,树高、基茎均与密度呈显著性负相关；随着密度增加,单株各器官生物量均出现显著差异,叶片与树干的生物量随密度的增加而减小;单株生物量随密度的增大而减小,林分生物量则相反；M156、M254、M154以及M204 4个较小密度的去灰分热值以及灰分含量并未出现显著性差异,随着初植密度的增加,低密度与高密度出现了显著性差异.通过对影响能源林各指标进行主成分分析可知,M202、M152、M154和M252 4种初植密度适合作为桉树生物质能源林的栽植密度进行推广.
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