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作 者 ：邓廷秀

期 刊 ：生态学报 1981年 1卷 3期 页码：221~226

关键词：桤木；

摘 要 ：桤木(Alnus cremastogyne Burk),落叶乔木树种,主要分布于四川盆地,贵州、陕西、云南等省亦有分布。因生长迅速、适应性强,且具根瘤能固氮改良土壤,是盆地农区最广泛的荒地和四旁绿化造林树种之一。盐亭地区,属深丘低山地形,以林山公社为代表,近年来,大力营造桤木和柏木(Cupressus funebris Endl)的混交林和桤木纯林,取得了较好的效果,桤木占总造林面积的一半左右。

Abstract:This article presents the correlation of power function between the alder diameter and amount of alder(Alnus crernastogyne) foliage, which may be expressed by means of logarithm regression equation as follows;log Wf = 1.322,2 log D- 0.7497 (in slope, in May)log Wf= 1.7995 log D- 0.7866 (in gully, in May)log Wf = 1.9048 logD- 0.5951(in slope, in September)All the Correlation coefficients are very close. According to the equations the amount of foliage in the 7-year-old plantation can be calculated. The resul...

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