英语释义

1. the height of 41/? feet above ground at which the diameters of standing trees are usually measured

片语

breast height form quotient[林]

piameter at breast height立木胸径

basal area of breast-height胸高断面积

breast diameter height form factor胸高形数

total basal-area of breast-height胸高总断面积表

breast-height basal area胸高断面积

diameter of breast height乔木胸径

Breast-height form-factor胸高形数

英汉例句

• The trunk runoff is decrease gradually with tree diameter breast height increased, the crown cover areas enlarged and the bark thickened.

  树干茎流量随着林木胸径的增加、林冠覆盖面积的增大和树皮增厚而减小。

• We can find the relationships between relative diameter and relative height, DBH and breast height culm thickness, relative culm length and number of culm by studied the structure of culm form.

  通过对梁山慈无性系种群秆形结构的研究，初步掌握了梁山慈相对直径和相对高度的关系、胸径与胸高壁厚的关系、梁山慈相对节间长度和节位数的关系。

• The results of variance analysis indicated factors including thickness of litter , tree height, canopy density, diameter at breast height and so on , have prominent effect on storage of seed banks .

  方差分析表明，枯枝落叶层厚度、树高、郁闭度、胸径等因子变化对土壤种子库储量影响显着。

• 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.

  为了更準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。