There are significant difference among DBH, height and volume.
地径、胸径、材积之间存在显著差异。
The average DBH of new bamboo increased with the increasing distance from the tree.
随距阔叶树基干距离的增加，新竹平均胸径迅速增加。
The model between aboveground biomass and DBH is fine because of its high significance.
地上生物量与胸径关系模型的相关性都达到极显著。
M. P. R. stand; trees of small and big DBH are less than trees of middle DBH in A. R. stand.
低径级个体占的比重极小，而中、高径级个体占的比重极大；
The linear correlations between allocation ratio of bark, trunk and root and DBH are also well.
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 results indicated that thinning based on small DBH had positive effect on stand distribution.
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 indexes are the wood property and character, namely, DBH, bulk density, fiber length, MOR etc.
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 DBH, volume, crown breadth and the growth of shoots increase obviously as the density decreases.
胸径、材积、冠幅、新梢生长量随造林密度减小显著增大。
The relationships among 5 competition index and DBH, tree height and crown length have been established.
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。
These models could be used to generate the standard tables for tree height, dbh, stand density and density control map.
模型可用于编制树高标准表、直径标准表、密度标准表以及密度控制图等。
The relationship of scenic value and tree growth in Finns tabulaeformis stand is the higher DBH, the better vision effect;
油松风景林的美景度与林木生长间的关系，一般胸径较大观赏价值较高，生长势较好林木的观赏效果也较好；
It was found out that the value of the stand DBH at the succession stages appeared to be inclined to left side mountain-liking curve.
对林分结构研究表明，不同发育阶段的林分林木直径分布呈左偏单峰山状曲线，林木株数随径阶变化可以分为四个阶段；
Regulation of self- thinning is that relationship between DBH and average density of population accords with negative power function.
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。
The key factors affecting the yield of shoot were the quantity and DBH of living culm, which determined the quantity and quality of shoot.
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 fitted quantitative regression models could be used to forecast height and DBH of the young stands, and the forecast precision was high.
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 relatively high phenotype and genetic correlation of Cunninghamia lanceolata exist between growth characters of height, dbh and volume, etc.
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。
Factors involved in the model are tree height, DBH, bark thickness at breast height, height of first dead branch, and height of blackened trunk.
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。
The genetic gains of 17.8%, 18.6% and 18.7% would be got when 50 plus families were primarily selected based on DBH, height and volume respectively.
根据胸径、树高和材积进行优良家系的初步选择，选择前50个优良家系所获得的遗传增益分别为17.8%、18.6%和18.7%。
The provenance experiment on Eucalyptus smithii shows that height, DBH, volume have little variation in provenance, and great variation in individuals.
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 genotype-environment interaction of 4-year DBH growth was analyzed in 4 locations for 5 cottonwood clones by using 5 genetic stability analysis methods.
用五种遗传稳定型分析方法对四个区域化试验点的5个美洲黑杨无性系生长量的基因型与环境交互作用进行了分析。
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.
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 age age phenotypic and genetic correlations for DBH, height were very high, indicating that these relationships were mainly controlled by genetic factors.
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 correlation between frequency variations of enzyme bands and tree height, DBH and volume was very small. Only B45 band came up to or closed significant level.
酶带频率变异与树高、胸径、材积生长相关性很小，只有B _(45)酶带与生长相关达到或近于显著水平。
The larval tunnel quantitative ratio increase with the pine tree height and DBH increased, but it was no correlated with the volume of different height region in tree.
幼虫坑道数量比率随不同松树高度、胸径的增加而增高，与株内不同高度区域的材积大小无关。
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%.
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。
Based on analysis of population size class structure, the trend of population density of Schima superba changing with individual DBH was similar to skew normal distribution.
基于种群径级结构分析，木荷种群密度随个体胸径的变化趋势类似于偏正态分布形曲线。
Comparative experiments was conducted on the effect of one-time irrigation and fertilization on the DBH and crown density of young 107 poplar plantations of even planting density.
对等密度107杨幼龄林进行一次性施肥灌溉措施对比试验，结果表明，一次性水肥措施对其幼林未郁闭前各龄期胸径生长量和郁闭度均有促进作用。
Comparative experiments was conducted on the effect of one-time irrigation and fertilization on the DBH and crown density of young 107 poplar plantations of even planting density.
对等密度107杨幼龄林进行一次性施肥灌溉措施对比试验，结果表明，一次性水肥措施对其幼林未郁闭前各龄期胸径生长量和郁闭度均有促进作用。
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