At breast height, measure the trunk diameter by a ruler. 在胸部高度的位置,用一把直尺量度干径。
Significant variations were found in tree height, diameter at breast height, volume, and survival rate between the transgenic and untransformed control plants. 转基因株系与对照株系间树高、胸径、材积和保存率的差异均达到极显著水平;
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。
Relationships between diameter at breast height and cone / seed character of Pinus thunbergii population in Yantai coastal protection forest 烟台海防林黑松种群胸径与种实性状关系
The average height and diameter at breast height of reeds are significantly correlated with average water depth. 芦苇的平均高度和平均茎粗与平均水深呈显著相关。