马志刚,张超,梁军,张丽敏,孙利娟,王光民,高巍,孙志强

• 1:国家林业局泡桐研究开发中心
• 2:河南省三门峡市人民公园管理处
• 3:中国林科院森林生态环境与保护研究所
• 4:河南濮阳林业科学研究所

摘要(Abstract)：

为探讨修枝的伤口如何影响杨树伤流溃疡病的发生,以3 a生和5 a生欧美杨107杨(Populus×euramericana cv.‘74/76’)为对象,2010—2013年在河南省清丰县分别开展了修枝季节(冬季和夏季)、同一季节不同修枝强度(1/3 H,2/3 H)对树木伤流溃疡病发病影响的研究。结果表明,修枝会诱发伤流溃疡病的发生,特别是冬季修枝后5 a生杨树的发病率高达86.6%,3 a生亦高达62%;而夏季修枝后的发病率仅为6.25%,同期的对照组的自然发病率在3%以下。伤流溃疡病发生与修枝强度关系不大,而与修除的枝条基径间存在极显著的正相关关系。3 a生杨树修除的枝条平均基径为4.67 cm时,发病率达到20%,而5 a生杨树修除枝条基径>5.5 cm时,发病率高达85.71%。主干横切圆盘显示,病害发生后,病灶处木材出现腐烂并造成了木材变色。建议杨树修枝的树龄在5 a前,枝条基径上限为3~5 cm,修枝时间应在夏季。

关键词(KeyWords)： 107杨;修枝;修枝强度;伤流溃疡病;枝条基径

Abstract:

Keywords:

基金项目(Foundation): 国家“十二五”科技支撑计划项目(2012BAD19B0801)

作者(Author): 马志刚,张超,梁军,张丽敏,孙利娟,王光民,高巍,孙志强

DOI: 10.16445/j.cnki.1000-2340.2016.01.006

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