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As daylight dwindles and temperatures drop in this forest in Perthshire, Scotland, beech trees (Fagus sylvatica) switch into power-saver mode.
当森林里的白天在减短,气温在降低时,苏格兰佩思郡的山毛榉(Fagus sylvatica)就进入了一种保存能量的状态。
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The reasons of gap formation were discussed. The component of regeneration of Fagus engleriana had a positive correlation with the size of gap.
探讨了林窗的形成原因,米心水青冈的更新成分与林窗的大小呈正相关性。
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Beech wood (Fagus SPP.) sawn or chipped lengthwise, sliced or peeled, whether or not planed, sanded or finger-jointed, of a thickness exceeding 6 mm.
山毛榉(山毛榉属)材,经纵锯或纵削、平切或旋切,不论是否经刨平、砂磨或端接,其厚度超过6公厘者。
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The loss rate of dry weight of Pterocarya insignis and Cercidiphyllum japonicum was 77% and 71%, and shat of Fagus engleriana and Cyclobalanopsis multinervis was 43% and 42%.
华西枫杨、连香树树叶干重损失达77%、71%; 而米心水青冈和多脉青冈树叶干重损失为43%和42 %。
1. 约10种,分布于北半球温暖地带,中国约5种,广布于长江以南、五岭以北各地。为落叶乔木,雄花序球状,下垂,有花5至多朵;雄花无退化雌蕊,雌花1~3朵生于壳斗(总苞)内,子房3室,花柱3枚,柱头舌状,壳斗瓣裂,坚果具3棱。子叶在种子萌发时出土。多生于较高海拔的山地杂木林中,常为上层树种。生长迅速,树干通直,较早成材。造林以播种繁殖为主。环孔材,木材棕至淡红褐色,鲜艳,材质稍坚重,结构均匀,密致,但干后多爆裂,不耐腐。为建筑、地板、家具、枪托、农具柄等用材。常见的有水青冈、米心水青冈及台湾水青冈。