Effects of Different Cutting Intensities on the Growth and Canopy Structure of Eucalyptus
This study revealed the specific effects of harvesting intensity on the growth and canopy structure of eucalyptus trees by conducting a comparative analysis of key growth parameters under dif-ferent harvesting intensities,including stand height,diameter at breast height(DBH),individual tree volume,leaf area index(LAI),mean leaf angle(MLA),and canopy openness.The findings provided important scientific reference and practical guidance for thinning strategies and sustainable manage-ment of eucalyptus plantations.The specific research results are as follows:(1)As harvesting inten-sity gradually increases,a certain decreasing trend was observed in the LAI of eucalyptus trees,with a reduction in MLA and a corresponding significant increase in canopy openness;(2)Under high-in-tensity harvesting(HT treatment)conditions,the average DBH and individual tree volume of euca-lyptus trees reached their maximum values,with significantly higher differences compared to the con-trol group(CK)without harvesting;(3)Harvesting intensity showed a significant positive correlation(P＜0.05)with DBH and an extremely significant positive correlation(P＜0.01)with canopy open-ness,while it exhibited a negative correlation with LAI and MLA.In summary,harvesting intensity has a positive impact on the canopy structure and stand growth of eucalyptus plantations.A moderate increase in harvesting intensity favors an increase in canopy openness,improves light conditions with-in the forest,and promotes the growth of individual DBH and the accumulation of individual tree vol-ume in eucalyptus trees.This study provides scientific basis for silvicultural practices and research on the targeted cultivation and sustainable management of large-diameter eucalyptus trees.
万方数据
维普
