不同造林密度对火力楠早期生长的影响  

Effects of Different Planting Densities on the Growth of Michelia macclurei Dandy

作　　者：黄军雄 龚益广 冯才丽 仲崇禄[2] 李清莹[2] 姜清彬[2] Huang Junxiong1,Gong Yiguang1,Feng Caili1,Zhong Chonglu2,Li Qingyin2,Jiang Qingbin2(1.Liangdongjing Forest Farm,Xijiang Forestry Bureau of Guangdong Province,Yunfu 527400;2.Research Institute of Tropical Forestry,Chinese Academy of Forestry,Guangzhou 51052)

机构地区：[1]广东省西江林业局良洞迳林场,云浮527400 [2]中国林业科学研究院热带林业研究所,广州510520

出　　处：《湖北林业科技》2018年第3期12-14,共3页Hubei Forestry Science and Technology

基　　金：国家重点研发计划子课题(2017YFD0601101-7);中央公益性院所基金项目(RITFYWZX201506)

摘　　要：为了解有利于火力楠早期生长的合理种植密度,以达到较佳的人工林生长效益,选用6个造林密度对火力楠进行密度试验。根据3.5年生的观测数据进行分析结果表明:火力楠造林早期1.5~2.5年时,不同造林密度对火力楠树木的生长影响不大,但到第3.5年起,不同密度间树高生长呈显著差异,但胸径大小尚未见有显著差异。所以火力楠早期生长宜采用较密的种植方式(株行距2 m×2 m、3 m×2 m和3 m×3 m),以便林木在树高和胸径生长快速,以及形成较好树木干形,不宜采用株行距4 m×4 m和5 m×4 m的造林密度。In order to find a suitable planting density of M.macclurei plantation for obtaining good achievements.In this paper,six afforestation densities were used to test the density of M.macclurei.According to the 3.5 years old observation data analysis results show that：there were no significant differences in the growth of M.macclurei at the early stage of 1.5 to 2.5 years.However,there was a significant difference in tree height growth among different densities in the 3.5 year,but there was no significant difference in DBH.Therefore,the early growth of M.macclurei cannon should adopt a more dense planting method（spacing 2 m×2 m,3 m×2 m and3 m×3 m）,so that trees in the tree height and diameter growth at the DBH,and the formation of better tree stem form.It is not advisable to use plant spacing 4 m×4 m and 5 m× 4 m.

关 键 词：火力楠 造林密度 树高 胸径 

分 类 号：S792[农业科学—林木遗传育种]