地径、胸径、材积之间存在显著差异。
There are significant difference among DBH, height and volume.
方法左胸径路组与右胸径路组进行对比。
Methods To compare the group of left chest route with the group of right chest route.
乔木层株数随胸径分布呈现截尾正态分布。
Diameter distribution of tree stratum reveals truncated normal distribution.
经胸径路上切缘距离最长但全胃切除最少；
Transthoracic approach had the longest distance of proximal margin, but the least total gastrectomies.
林分平均木胸径总、平均和连年生长量最好。
The total, average and current annual increment of breast diameter of stand average stem are best.
地上生物量与胸径关系模型的相关性都达到极显著。
The model between aboveground biomass and DBH is fine because of its high significance.
随距阔叶树基干距离的增加，新竹平均胸径迅速增加。
The average DBH of new bamboo increased with the increasing distance from the tree.
较小的经营密度有利于提高人工油松林胸径生长速率。
Smaller management density was beneficial to increase DBH growth rate of Chinese pine forest.
胸径、材积、冠幅、新梢生长量随造林密度减小显著增大。
The DBH, volume, crown breadth and the growth of shoots increase obviously as the density decreases.
调查项目为胸径及容积密度、纤维长、弹性模量等材性性状。
The indexes are the wood property and character, namely, DBH, bulk density, fiber length, MOR etc.
树叶生物量分配比例数据较为分散，和胸径不存在线性关系。
The linear correlations between allocation ratio of bark, trunk and root and DBH are also well.
樟子松种群自疏规律为：平均胸径与密度的关系符合负幂函数模型。
Regulation of self- thinning is that relationship between DBH and average density of population accords with negative power function.
杉木在树高、胸径和材积等生长性状间有较高的表型和遗传相关性。
The relatively high phenotype and genetic correlation of Cunninghamia lanceolata exist between growth characters of height, dbh and volume, etc.
结果表明，以小径木为间伐对象的间伐作业对林分胸径分布有正面影响；
The results indicated that thinning based on small DBH had positive effect on stand distribution.
试验结果表明：不同的抚育间伐强度对林木的胸径生长有着极显著的影响。
Trial result showed that different intensity of tending and thinning possesses remarkable influence to woody D. B. h.
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。
The trunk runoff is decrease gradually with tree diameter breast height increased, the crown cover areas enlarged and the bark thickened.
胸径、树高的早-晚相关十分紧密，且这种相关关系主要受遗传因素制约；
The age age phenotypic and genetic correlations for DBH, height were very high, indicating that these relationships were mainly controlled by genetic factors.
竹笋产量主要影响因子是丛立竹数和立竹胸径，决定出笋数量和笋个体质量。
The key factors affecting the yield of shoot were the quantity and DBH of living culm, which determined the quantity and quality of shoot.
判别因子包括个体的树高、胸径、胸高处皮厚、第一枯枝高和树干熏黑高度。
Factors involved in the model are tree height, DBH, bark thickness at breast height, height of first dead branch, and height of blackened trunk.
运用所拟合的数量化回归模型预测马尾松幼林的树高和胸径可达到较高的精度。
The fitted quantitative regression models could be used to forecast height and DBH of the young stands, and the forecast precision was high.
在杉木子代测定中，观测了各年到16年（或7年）的树高，胸径和材积生长。
Stem height, diameter and volume growth were measured at various ages up to that of 16 (or 7) in a Chinese Fir progeny test.
树的高度、密度、胸径、森林下草的高度， 草的盖度与鸟类密度相关不显著。
However, The Mongolian pine height, density, DBH and the height and covering degree of grass under forest highly was not remarkable relevance with bird density, respectively.
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。
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.
选取5种竞争指标，建立人工落叶松林木胸径、树高和冠长与各竞争指标间的相关关系。
The relationships among 5 competition index and DBH, tree height and crown length have been established.
两种林分的胸径生长量在13年生以后明显降低，但阴坡林分的降幅明显小于阳坡林分；
The DBH growth of the two forests was declined greatly after 13 years, but the decrement was obviously less in shady slope forest than in sunny slope forest.
结果表明：(1)在1%的显著水平下，不同间伐强度对林分平均胸径的生长影响显著。
The results showed: (1) Under the 1% significant level, there was significant impact on the stand average diameter about different thinning intensities.
结果表明，保留密度的变化对树高生长影响不大，对林分胸径和单株材积的生长影响显著。
The results showed that the effect of the reserve density on the diameter and volume of individual tree were obvious.
林分标准郁闭度达0.85以上时，胸径连年生长量已下降，株数间伐强度以不超过30%为宜。
While standard degree of closing of the plantation reached 0.85, current annual increment of DBH started to decline, and the intensity of thinning should not exceed 30%.
树干茎流的大小主要受树皮的吸水性能、树木胸径、树干枝角与冠型结构、降雨量及降雨强度的影响。
The stemflow is influenced by the water absorbing property of barks, the diameter in breast high of trees, the branch angles, the crown structure, the precipitation and the intensity of precipitation.
史密斯桉种源试验结果表明：树高、胸径、材积种源间变异相对较小，而种源内个体间的变异较为丰富。
The provenance experiment on Eucalyptus smithii shows that height, DBH, volume have little variation in provenance, and great variation in individuals.
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