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杨树移栽后立即采取适当的修枝措施,可减少和控制缓苗期叶片的生长量,增加根系生长量。由于地上部分水分蒸腾面积的减少和地下部分吸水能力提高,使树体含水量增加,因而提高了杨树抵抗溃疡病的能力。采用修枝技术不仅可以收到显著的防病效果,对提高幼树成活和生长均有显著效果。
Appropriate pruning measures were taken immediately after the transplanting of poplar trees to reduce and control the growth of leaves at the recuperation stage and increase the root growth. Due to the decrease of transpiration area above ground and the increase of water absorption capacity of underground part, the moisture content of tree body increases, thus improving poplar’s ability to resist ulcer disease. The use of pruning technology can not only receive significant anti-disease effect, to improve the survival and growth of saplings have a significant effect.