Growth and Branching of Young Cottonwoods After Pruning
Growth and Branching of Young Cottonwoods After Pruning
复制标题
修剪后小杨树的生长和分枝
DOI：
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发表时间：
1976
期刊：
影响因子：
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通讯作者：
R. M. Krinard
中科院分区：
文献类型：
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作者：
R. M. Krinard
虽然春季和夏季修剪到不同的高度减少直径生长的治疗年，大多数修剪树木的直径增量没有显着差异，从对照治疗后2年。在测试期间的总直径增长显着小于修剪树木比对照。上果枝增加春季处理和更大的修剪高度。修剪显然是必要的，以获得高质量的茎。夏季修剪比春季修剪更好，在休眠季节测量的总高度不应超过三分之一。
Although spring and summer pruning to various heights reduced diameter growth for the treatment year, diameter increment of most pruned trees did not differ significantly from that of controls 2 years after treatment. Total diameter growth during the test period was significantly less for pruned trees than for controls. Epicormic branching increased with spring treatments and with greater pruning heights. Pruning is apparently necessary to obtain highquality stems. Summer prunings are preferable to spring ones, and no more than onethird of the total height measured during the dormant season should be pruned.