坡位和密度对尾巨桉DH32-13林分生长的影响  

The effects of slope position and density on the growth of Eucalyptus urophylla×E.grandis DH32-13 stands LI Wenxiang

作　　者：李文祥 LI Wenxiang(Tianma National Forest Farm of Pinghe County,Fujian Province,Pinghe 363704,Fujian,China)

机构地区：[1]福建省平和天马国有林场,福建平和363704

出　　处：《福建林业》2024年第4期45-48,共4页Fujian Forestry

基　　金：福建省属公益类科研院所基本科研专项(2021R1010004)。

摘　　要：对不同坡位和初植密度的尾巨桉DH32-13无性系生长量及经济效益进行调查与分析,结果表明:坡位、密度对8年生尾巨桉DH32-13林分生长量和经济效益均有显著或极显著影响,下坡的生长量最大、经济效益最高,最适初植密度为1650株·hm^(-2);最优坡位和最适初值密度的平均造林成活率分别达95.9%和95.7%,8年生林分保存率、胸径、树高、单株立木材积和蓄积量分别达80.0%~83.3%、16.2~16.8 cm、21.7~24.4 m、0.2070~0.2519 m^(3)、285.6~332.5 m^(3)·hm^(-2),净利润达11.15~14.40万元·hm^(-2),合适的造林坡位和适宜的初植密度能提高尾巨桉DH32-13无性系林分生产力和经济效益。The growth and economic benefits of the Eucalyptus urophylla×E.grandis DH32-13 clonal forest at different slope positions and initial planting densities were investigated and analyzed,and the results showed that both slope position and density significantly or extremely significantly impact the growth and economic benefits of 8-year-old DH32-13 stands.The maximum growth and economic benefit are observed on downhill slopes,with the optimal initial planting density being 1650 trees·hm^(-2).The average survival rate of plantations at the optimal slope and initial density was 95.9%and 95.7%,respectively.The 8-year-old stand's preservation rate,diameter at breast height,tree height,individual wood volume,and timber volume reached 80.0%~83.3%,16.2~16.8 cm,21.7~24.4 m,0.2070~0.2519 m^(3),and 285.6~332.5 m^(3)·hm^(-2),respectively.The net profit ranges from 111,500 to 144,000 yuan·hm^(-2).Suitable planting slope position and initial density can enhance the productivity and economic benefits of the DH32-13 clonal stands.

关 键 词：尾巨桉DH32-13 坡位 初植密度 生长量 经济效益 

分 类 号：S792.39[农业科学—林木遗传育种]