Review on Effect of Pruning on Tree Growth and Wood Quality

CAO Pei; XU Cheng; LI Mengqiu; TANG Luozhong

doi:10.11924/j.issn.1000-6850.casb2025-0183

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Chin Agric Sci Bull ›› 2025, Vol. 41 ›› Issue (22) : 35-40. DOI: 10.11924/j.issn.1000-6850.casb2025-0183

Review on Effect of Pruning on Tree Growth and Wood Quality

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Abstract

Pruning is an essential technical measure in the process of forest cultivation. Reasonable pruning is conducive to promoting the growth of forest trees, improving the trunk shape, increasing trunk completeness and timber outturn percentage, reducing the number of dead and live knots, and improving the overall quality of wood. This paper comprehensively analyzed the influence and mechanism of pruning on the growth of tree diameter at breast height and tree height, the physical properties of wood, and the tree trunk quality, and revealed that the growth promotion effect was achieved by regulating the distribution of photosynthetic products and improving the efficiency of nutrient transport. At the same time, the complex regulation rules of pruning intensity and seasonal difference on wood density, mechanical properties and knot scar formation were clarified. On this basis, it further summarized the deficiencies and problems in the past research and put forward the main research directions for the future as follow. (1) To construct the theoretical model of precise pruning based on tree species characteristics and growth stages; (2) to research and develop intelligent pruning equipment and digital operation systems; (3) to establish a standardized technical system covering material improvement and economic benefit evaluation. The research results provide theoretical support and technical path for directional cultivation of high-quality industrial materials.

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pruning / tree growth / crown morphology / wood properties / wood density / mechanical properties of wood / knots

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CAO Pei , XU Cheng , LI Mengqiu , et al. Review on Effect of Pruning on Tree Growth and Wood Quality[J]. Chinese Agricultural Science Bulletin. 2025, 41(22): 35-40 https://doi.org/10.11924/j.issn.1000-6850.casb2025-0183

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Cited in this article [2] Abstract

【目的】对红锥树干节疤分布规律进行调查并开展修枝试验,提出红锥修枝措施以促进其生长,以减少木材节疤形成,培育大径级无节良材。【方法】通过对30年生红锥自然生长形成的节疤分布情况进行调查,了解其节疤形成的时间和在树干中的分布规律。在6年生红锥人工林中设置不同的修枝强度,并对修枝后18个月林地中各单株的生长情况进行调查,分析修枝对树木生长的影响,选取最优修枝强度。选择3种常见建材用漆作为修枝锯口保护剂,通过对锯口愈合情况和锯口部位横切面的调查,判断不同锯口保护剂的保护效果及修枝后对锯口部位木材径向生长的影响。【结果】红锥节疤主要分布在心材中,死节数量占87%。修枝可以显著提升红锥单株的胸径生长,但不同修枝强度间暂未出现显著差异。使用锯口保护剂可有效促进节疤愈合并减缓木质部从锯口处向深处坏死,油性漆对锯口保护效果最好,直径3.5 cm以下锯口愈合率可达94.2%以上;直径大于3.5 cm锯口的愈合率可达84.1%;对直径3.5 cm以上锯口的坏死深度可降低61.2%。此外,修枝可以显著改善枝条下方径向生长受到抑制的情况。【结论】本研究总结的修枝方法操作性较强,成本较低,可提高单株的生长量和圆满度,减少木材节疤的形成,可应用于红锥人工林经营。

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