...择性较弱;栖息地优势树种为兴安落叶松; (2)主要喜欢中、下坡位; (3)对小树密度、大树密度、乔木胸径(diameter of breast height,DBH)、倒木长度、倒木密度、倒木直径等环境因子具正选择;其中,春季对大树密度和倒木密度选择性最强,夏季对大...
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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。
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 showed: (1) The stands with different remaining years presented outstanding difference in the numbers and breast-height diameter of new culms and the output of bamboo timber.
不同留养度数的毛竹林、其新竹数量、新竹胸径和竹材产量的差异是显著的。
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