三个相思树种的造林对比试验  

The Comparative Experiment on Afforestation of Three Acacia Species

作　　者：覃永华[1] 唐继新[1] 秦武明[1] 黄永 刘淑英 赵绍文[1] 

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

出　　处：《广西科学》2008年第1期87-91,共5页Guangxi Sciences

基　　金：广西"十五"林业科学研究项目(2002-59);广西高峰林业相思树短周期工业用材基地高产林试验与推广科研基金项目(X032069)资助

摘　　要：在广西国有高峰林场界牌分场科技示范园内进行厚荚相思（Acacia.crassicarpa）、马占相思（A.mangium）和杂交相思（A.mangium×A.auriculif ormis）的造林试验。试验按上坡、中坡、下坡设置3个随机区组,每个区组内有3个小区,每小区用一个树种造林,面积为400m^2。结果表明：3个树种的6年生平均树高分别为13.4m、12.4m和11.0m,前者比后两者分别高7.5%和17.9%;林分平均胸径分别为13.7cm、12.8cm和11.2cm,前者比后两者分别大6.6%和18.2%。3个相思树种的树高和胸径生长特点都是早期生长迅速,速生期在1～3a间,树高年生长量为3.0～3.6m,胸径年生长量为3.8～4.7cm。活立木蓄积分别达122.3m3/hm^2、100.7m3/hm^2和70.7m3/hm^2,前者为后两者的121.5%和173.0%;纯收入分别为10620.0元/公顷、7695.0元/公顷和3645.0元/公顷,前者为后两者的1.38倍和2.91倍。短周期工业用材相思树类造林树种选择厚荚相思为优,其次为马占相思。Experiments on afforestation of Acacia crassicarpa , A. mangium and A. mangium × A. auriculiformis were carried out in the Forestry Science and Technology Demonstrate Farm of Guangxi. Three random block were set respectively on the upper slopes, middle slopes and lower slopes on the trial. Each block includs three plot of 400m^2 planted with one tree species. The results showed that the average tree height were 13.4m, 12.4m and 11.0m respectively,the former was 7.5 and 17.9 percent higher than that of the two latter. The average DBH were 13.7cm,12.8cm and 11.2cm respectively,the former was 6.6 and 18.2 percent larger than that of the two latter. Both the tree height and DBH of the three Acacia species had a characteristic of rapid early growth. The rapid growth stage was between 1 to 3 year. The annual tree height were 3.0～3.6m and the annual DBH were 3.8～4. 7cm. The volume accumulation were 122. 3m3/hm^2, 100. 7 m3/hm^2 and 70. 7 ma/hm^2 respectively,the former was 121. 5 and 173.0 percent of the two latter. The pure income were 10620. 0 yuan/hm2, 7695. 0 yuan/hm2 and 3645. 0 yuan/hm^2 respectively, and the former was 1.38 and 2.91 times of the two latter. Comprehensive analysis of the growth and static economic benefits, A. crassicarpa is the best tree species for industrial timber plantation in shortterm rotation,and then A. mangium.

关 键 词：相思树 造林试验 生长量 经济效益 

分 类 号：S725.1[农业科学—林木遗传育种]