摘要
以香合欢天然次生中龄林为研究对象,探讨不同目标树经营模式对香合欢天然次生林林木生长的影响,以期促进香合欢天然次生林的恢复与可持续经营。结果表明:目标树经营可显著提高林木生长量,随着目标树保留密度增大,树高和胸径增长量呈现出逐渐减小的趋势;树高和胸径增长量随着施肥量的增加而逐渐增加。目标树保留株数相同时,不同施肥量处理间冠幅增长量无显著差异,但整体表现为东西和南北冠幅增长量随施肥量增加而增加。单株材积和林分蓄积量随着目标树保留株数减少而增加,随着施肥量的增加而增加;在实施1年后,目标树保留株数对单株材积增长量、林分蓄积增长量、胸径增长量、树高增长量的影响均极显著;施肥对香合欢中龄林单株材积增长量、林分蓄积增长量的影响不显著,而对胸径增长量、树高增长量的影响极显著。林分蓄积在目标树保留10株,施肥量1kg·株^(-1)时林分蓄积增长量最大,是该实验阶段表现出最佳的目标树经营模式。
To enhance the recovery and sustainable management of Albizia odoratissima natural secondary plantations,this study examined the effects of different crop tree release patterns on plantation growth.The results indicated that crop tree release significantly promotes tree growth,with the growth of tree height and diameter at breast height(DBH)showed a gradually diminishing trend as the density of retained target trees rises and tree height and DBH improved with higher levels of fertilizer application.While there were no significant differences in crown width growth across various fertilizer treatments with a constant number of target trees,the overall east-west and north-south crown widths increased with more fertilizer.Individual tree volume and stand volume both rose with fewer retained trees and more fertilizer application.After one year,the number of retained target trees significantly impacted individual tree volume growth,stand stock,DBH,and tree height.Fertilization significantly influenced DBH and tree height growth but had no notable effect on individual tree volume or stand stock.The optimal management model in this experimental phase was found to be retaining 10 target trees and applying 1 kg of fertilizer per tree.
作者
韩俊学
欧汉彪
李兴富
韦铄星
黄康庭
李佳男
HAN Junxue;OU Hanbiao;LI Xingfu;WEI Shuoxing;HUANG Kangting;LI Jianan(Guangxi Zhuang Autonomous Region State-owned Yachang Forest Farm,Baise 533000,Guangxi,China;Guangxi Zhuang Autonomous Region Forestry Research Institute,Nanning 530002,Guangxi,China;Guangxi Zhuang Autonomous Region State-owned Daguishan Forest Farm,Hezhou 542800,Guangxi,China;Guangxi University,Nanning 530004,Guangxi,China)
出处
《桉树科技》
2024年第3期74-78,共5页
Eucalypt Science & Technology
基金
广西重点研发计划项目(2023AB26024)
广西自筹经费林业科技项目(2023GXZCLK35)
广西自筹经费林业科技项目(桂林科研[2022ZC]第105号)。
关键词
目标树经营
香合欢
中龄林
增长量
crop tree release
Albizia odoratissima
middle-aged plantation
increment
