时间： 2022-04-10 00:10:01 英文翻译
Diameter at breast height
胸径───Diameter at breast height
The diameter at breast height of most gap makers was 20~30 cm.───林隙形成木分布最多的径级在20～30cm之间.
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。
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.───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。
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.───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。
In the study, Jackknife combined with sequential statistical parameter was applied into double regression sampling, and volume is target element and diameter at breast height is auxiliary element .
By the way of the stem analysis, the regularity of the Catalpa tree on the diameter at breast height, tree height, growth factors such as volume, which changes with age, are studied.
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