...中林系列;杨树品种;胸径;材积;树高;江淮地区 [gap=963]Key wordsZhonglin series; poplar varieties; diameter at breast height; volume; height; Jianghuai areas ...
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通常,胸高直径(Diameter at Breast Height , DBH)与植物的年龄或生活阶段有明 显的正相关关系,可直接以胸径作为相对年龄来反映木本植物的年龄结构。
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断根程度 脱落期间进行断根处理,对照与处理之间累积茎流通量差异达到极显著水平。生长季节进行断根处理,12、10倍胸径(diameter at breast height, DBH)断根处理的茎流通量与8倍胸径断根处理相比差异显著,12倍与10倍胸径断根处理之间的茎流通量差异不显著
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天然林与人工林的BCEF和BEF随林龄(Stand age, A)、平均胸径(Diameter at breast height, DBH)和林分密度(Stand density, D)的增加呈现相反的变化趋势.
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There were high correlation between tree height and diameter at breast height.
各试验点的树高和胸径与原产地的经纬度之间为负相关;树高与胸径具有高度的相关性;各种源、家系生长性状年一年相关性强。
参考来源 - 一球悬铃木种源内家系生长遗传变异及遗传多样性·2,447,543篇论文数据,部分数据来源于NoteExpress
以上来源于: WordNet
Factors involved in the model are: tree height. diameter at breast height. bark thickness at breast height. height of first dead branch and height of blackened trunk.
判别因子分别是:个体的树高、胸径、胸高处皮厚、第一枯枝高和树干熏黑高度。
The results indicated that the five traits like height, diameter at breast height, volume, wood basic density and tracheid length showed at least significant genetic variation among clones.
结果表明,无性系间树高、胸径、材积、木材基本密度和管胞长度存在显著至极显著差异。
Parabolic curve function, power function, Richards equation and single molecular equation, related tree height to diameter at breast height and widely used in forest gap model, were analysed.
为了更准确地描述树高与直径的关系,文章综合分析了广泛应用于林窗模型中的四个数学方程,即二次曲线、幂函数方程、理查德方程和单分子方程。
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