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. 修枝对云南松林分结构及生长影响的分析[J]. 西南林业大学学报, 2018, 38(3): 44-50. DOI: 10.11929/j.issn.2095-1914.2018.03.007
引用本文: 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. 修枝对云南松林分结构及生长影响的分析[J]. 西南林业大学学报, 2018, 38(3): 44-50. DOI: 10.11929/j.issn.2095-1914.2018.03.007
shu
Yangtao Li, Lianfang Li, Wenjun Yang, Lifang Ling, Jing Ma, Bailiang Wu, Guirong Ye, Junduo Wu, Song Shen, Liyu Yang, Weichong Li, Jianbin Gong, Shuhong Zheng. Analysis of Pruning Effecting on Stand Structure and Growth of Pinus yunnanensis[J]. Journal of Southwest Forestry University, 2018, 38(3): 44-50. DOI: 10.11929/j.issn.2095-1914.2018.03.007
Citation: Yangtao Li, Lianfang Li, Wenjun Yang, Lifang Ling, Jing Ma, Bailiang Wu, Guirong Ye, Junduo Wu, Song Shen, Liyu Yang, Weichong Li, Jianbin Gong, Shuhong Zheng. Analysis of Pruning Effecting on Stand Structure and Growth of Pinus yunnanensis[J]. Journal of Southwest Forestry University, 2018, 38(3): 44-50. DOI: 10.11929/j.issn.2095-1914.2018.03.007
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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

    摘要
  • 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。

     

    Abstract: 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.

     

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