Optimizing Reduction Pruning of Trees Under Electrical Lines: The Influence of Intensity and Season of Pruning on Epicormic Branch Growth and Wound Compartmentalization

Q2 Agricultural and Biological Sciences
G. Perrette, S. Delagrange, C. Messier
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引用次数: 3

Abstract

Reduction pruning of the main stem is commonly used during the maintenance of power lines to encourage the establishment and development of scaffold limbs away from wires. Understanding the physiology of epicormic branch initiation and growth as well as wound compartmentalization following reduction pruning are important for optimizing the pruning cycle and maintaining healthy and safe trees. In this study, the influence of both intensity and time of year of pruning on epicormic branch response and wound compartmentalization was investigated on 56 11-year-old Pennsylvania ash trees (Fraxinus pennsylvanica Marsh.) about 5 to 7 m in height within a controlled nursery environment. During the second growing season following reduction of the main stem, the number, height, and volume of epicormic branches, as well as tallest epicormic branches and the area of discolored wood, increased with pruning intensity. Pruning during the leaf-on season compared to the leaf-off season limited the establishment and development of epicormic branches without affecting wound-closure rate or the area of wood discoloration at the cutting point. Results are consistent with the known seasonal fluctuation of carbohydrates reserves. In the context of the electrical distribution network, where trees are subjected to pruning throughout the year, trees pruned in summer during a maintenance cycle could be pruned during the next cycle, in winter, and so on, to optimize the return interval of the pruning cycle.
电线下树木优化减量修剪:修剪强度和季节对表皮分枝生长和伤口分区的影响
在维护电力线的过程中,通常使用主杆的减量修剪,以鼓励脚手架分支远离电线的建立和发展。了解减量修剪后外生枝形成和生长的生理机制,对优化修剪周期,维护树木的健康和安全具有重要意义。在苗圃环境控制下,以56棵5 ~ 7 m的11年生宾夕法尼亚白蜡树(Fraxinus pennsylvanica Marsh.)为研究对象,研究了修剪强度和修剪时间对树外生枝反应和伤口区隔化的影响。在主茎减少后的第二个生长期,随着修剪强度的增加,外生枝的数量、高度、体积以及最高外生枝和变色木材面积均增加。与落叶季相比,在有叶季进行修剪限制了外生枝的建立和发展,但不影响切口闭合率或切点木材变色面积。结果与已知的碳水化合物储备的季节性波动一致。在配电网中,树木全年都需要修剪,在一个维护周期中,夏季修剪的树木可以在下一个维护周期中修剪,在冬季,以此类推,以优化修剪周期的返回间隔。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Arboriculture and Urban Forestry
Arboriculture and Urban Forestry Agricultural and Biological Sciences-Forestry
CiteScore
1.70
自引率
0.00%
发文量
25
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