摘要
杨树人工林冻裂率为60%以上。冻裂的相关因子为品种、密度、郁闭度、林龄、坡向、植被、抚育一次比抚育三次杨树冻裂少,生长量无大差异。试验证明:对杨树进行涂白、包草和抚育一遍、树干周围留草可以预防杨树冻裂。
The frost crack rate of poplar plantation is above 60%.The related factors of frost crack are variety,density,canopy density,forest age,slope direction,vegetation and tending times,in which tending one time has less frost crack than three times,meanwhile,the growth is no significant difference.The experiment shows that poplar's frost crack could prevent by the measures such as white paint,wrapping grass,tending one time and reserving grass around tree trunk.
出处
《林业勘查设计》
2007年第1期40-41,共2页
Forest Investigation Design
关键词
杨树
冻裂预防
涂白
包草
一遍抚育
干周留草
Poplar Precaution of frost crack White paint Wrapping grass Tending one time Reserving grass around tree trunk