不同造林密度对杂交相思生长的影响  

Effects of different afforestation density on growth of Acacia mangium×A. auriculaef Ormis

作　　者：王凌晖[1] 吴国欣[1] 施福军 秦武明[1] 余浩光 

机构地区：[1]广西大学林学院,广西南宁530005 [2]广西高峰林场,广西南宁530001

出　　处：《南京林业大学学报（自然科学版）》2009年第2期134-136,共3页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：广西“十五”林业科学研究项目(“十五”林科字[2002]第59号)

摘　　要：为了找出杂交相思人工林合理的种植密度,以达到较佳经济效益,笔者选用5种不同密度,采用单因素、随机区组设计进行杂交相思密度试验。对经过5年的观测资料进行分析表明:杂交相思不同造林密度对胸径、材积的生长有一定的影响,随着密度增大,胸径、单株材积表现出与密度间的负相关,每公顷833株林分的平均胸径为10.7 cm,每公顷1666株林分的胸径为9.6 cm;每公顷833株和1000株林分的5年生林龄时平均单株材积较高,分别为0.057566和0.05179 m3;5年生每公顷1666株的林分材积为63.9221 m3,分别比其他4种密度林分的高19.0%、52.0%、58.3%和103.3%。造林密度对树高生长无显著影响。In order to find out reasonable afforestation density of Acacia mangium x A. auriculaef Ormis, which would bring the best economic benefits, we selected 5 kinds of different densities, used the single factor and the randomized block arrangement experimental design to carry on Acacia mangium × A. auriculaef Ormis density experiment. After 5 years＇ observation, the results showed that different densities had a certain effects on diameter at breast height（DBH） and single tree volume of Acacia mangium × A. auriculaef Ormis. With the increase of afforestation density, DBH and single tree volume showed negatively correlation. The DBH was 10.7 cm at the density of 833 trees/hm^2 ,and the DBH was 9.6 cm at the density of 1 666 trees/hm^2. When the planting densities were 833 trees/hm^2 and 1000 trees/hm^2 , the tree volumes were 0.057 566 m^3,0.051 79 m^3. The 5 years＇ tree volume was 63. 922 1 m^3/hm^2 at the density of 1 666 trees/hm^2 , separately higher than the other four afforestation density 19.0% , 52.0% , 58.3% and 103.3%. The planting density had no significant effect on tree height.

关 键 词：杂交相思 造林密度 树高 胸径 材积 

分 类 号：S725[农业科学—林木遗传育种]