修枝对云南松林分结构及生长影响的分析  

Analysis of Pruning Effecting on Stand Structure and Growth of Pinus yunnanensis

作　　者：李杨涛 李莲芳 杨文君 凌莉芳 马敬 吴柏良 叶桂荣 吴俊多 沈松 杨历雨 李卫冲 龚建斌 郑树宏 Li Yangtao;Li Lianfang;Yang Wenjun;Ling Lifang;Ma Jing;Wu Bailiang;Ye Guirong;Wu Junduo;Shen Song;Yang Liyu;Li Weichong;Gong Jianbin;Zheng Shuhong(College of Forestry,Southwest Forestry Lniversity,Kunming Yunnan 650224, China;Lufengcun Forestry Center, Kunming Yunnan 652211,China)

机构地区：[1]西南林业大学林学院,云南昆明650224 [2]宜良禄丰村林场,云南昆明652211

出　　处：《西南林业大学学报（自然科学）》2018年第3期44-50,共7页Journal of Southwest Forestry University：Natural Sciences

基　　金：国家"十三五"重点研发计划(2017YFD0600504-1)资助

摘　　要：为了解修枝对云南松人工幼林林分结构和生长的影响,对宜良禄丰村林场尖山林区1 m×2 m×5 m非均匀密度控制营造10年生人工林,采用L4(23)正交设计(增加不修枝和重度修枝的2个对照)开展不同修枝方式和强度的试验,并于修枝前及修枝2 a后开展林分调查。结果表明:修枝前后林分径阶分别为2~14 cm和2~16 cm,8、10和10、12 cm径阶是构成林分此2个阶段的主要成分;修枝后,正交试验修枝4个处理组合的林分平均胸径、树高、单株材积分别为增加23.4%~28.7%、28.6%~34.2%、83.6%~100.3%,不修枝的此3个指标分别是21.9%、20.2%、68.9%,重度修枝的则分别为20.3%、21.4%、63.4%;以上3个指标增长率最大的都为手锯修枝保留3轮侧枝组合的,且正交试验修枝的均高于不修枝和重度修枝的。适宜的修枝方式及强度组合极显著地促进云南松幼林的生长。In order to understand effects of pruning on changes of stand structure and growth,the L4（ 23） orthogonal design was applied（ two treatments of non-and heavy-pruning as two controls） to implement the experiment of pruning method and intensity for a 10-year-old Pinus yunnanensis plantation which planted as the uneven row spacing schema of the 1 m × 2 m × 5 m in Jianshan Forest Zone,Lufengchun Forest Center,Yiliang County;and stand trees were mensurated before and after been pruned for 2 years. The results showed that diameter grads of the stand were 2-14 and 2-16 cm with the 8,10 and 10,12 cm comprised of dominant stand components before and after pruning,respectively. Mean increasing percents of diameters at breast height（ DBHs）,tree heights,timber volumes for four orthogonal-pruning treatment combination（ TC） were 23. 4%-28. 7%,28. 6%-34. 2%,83. 6%-100. 3%,while which of the three parameters for non-pruning control were 21. 9%,20. 2%,68. 9%,and foe severe-pruning control were 20. 3%,21. 4%,63. 4%,respectively; The highest increasing percent of these 3 parameters was found out the TC of handsaw pruning with keeping three wheel branches,and the increasing percents of orthogonal-pruning TCs were higher than which of the non-and severe-pruning TCs. It was significantly improved juvenile stand growth of P. yunnanensis applied proper TCs of pruning method and intensity.

关 键 词：云南松 修枝 林分结构 林木生长 

分 类 号：S791.257[农业科学—林木遗传育种]