中国农学通报2026，Vol.42Issue(7)：70-76,7.
修枝对桉树107无性系生长及碳汇效益的影响
Effect of Pruning on Growth and Carbon Sequestration Benefits of Eucalyptus 107 Clone
摘要
Abstract
This study aimed to investigate the effects of pruning intensity on the growth and ecological functions of Eucalyptus 107 clone plantations,providing theoretical and practical guidance for scientific silvicultural management.A randomized block design was implemented at the Xiaoheijiang Base in Ning'er County,Pu'er City,Yunnan Province,with four pruning treatments:no pruning(control),pruning branches below 1/3 of the tree height,pruning branches below 1/2 of the tree height,and remove branches below 2/3 tree height.Growth parameters,including tree height,diameter at breast height(DBH),individual tree volume,conservation rate,stand volume per unit area,and annual increment,were investigated at 1.5,2.5,and 5 years after pruning.At the same time,the chemical properties(organic matter,total nitrogen,total phosphorus,total potassium)and carbon sequestration capacity of Eucalyptus rhizosphere soil were analyzed.The results showed that at 5 years,the preservation rate of pruning below 1/2 tree height was the highest(83.75%),and the preservation rate of pruning below 2/3 tree height was the lowest(73.75%);at 1.5 years,pruning below 1/2 tree height significantly enhanced tree height,DBH and stand volume per unit area,though these effects diminished as the plantation aged.Pruning improved soil nutrient content(organic matter,total nitrogen,phosphorus,potassium)and soil quality.The pruning below 1/2 tree height treatment exhibited the highest carbon sequestration and oxygen production values at 1.5 and 2.5 years,but differences among treatments narrowed by 5 years.Moderate pruning(removing branches below 1/2 tree height)can enhance short-term growth,conservation rates,soil quality,and carbon sequestration capacity,but long-term benefits converge across treatments.It is recommended to adopt pruning intensities tailored to stand developmental stages and management goals to balance efficient plantation operations with ecological benefits.关键词
桉树人工林/修枝方式/保存率/生长性状/碳汇/土壤化学性质Key words
Eucalyptus plantation/pruning method/conservation rate/growth traits/carbon sink/soil chemical properties分类
农业科技引用本文复制引用
李国龙,李光友,陆钊华,姚洁玲,马留银,杨德明,徐建民,胡志康,张云东,熊珊..修枝对桉树107无性系生长及碳汇效益的影响[J].中国农学通报,2026,42(7):70-76,7.基金项目
十四五重点研发"桉树多轮伐期生产力和地力维持技术"(2023YFD2201003). （2023YFD2201003）
