地径、胸径、材积之间存在显著差异。
There are significant difference among DBH, height and volume.
例举了乘法回归模型的材积方程的应用实例。
Examples on volume equation of multiplicative regression model are illustrated.
杨树立木材种材积成数与胸高直径呈极紧密相关。
There is very close correlation between the stumpage volume percent of poplar timber assortment and the stumpages D.
本文提出了一致性分段式削度方程和一致性材积比方程。
In this paper a compatible segmented taper equation and a compatible volume ratio equation are developed.
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.
应指明最短交期，货物重量和材积，原产地，最忧付款方式。
Should mention the shortest delivery time, goods weight & volume, origin, best payment method.
原木材积的检测在林业研究及造纸工程等领域是十分重要的。
Log volume inspection is very important in forestry research and paper making engineering.
结合该系统的特点，对改进我国材积表体系提出了一些建议。
System, Suggestions are also given to improve the Volume Table System, presently used in China.
另一方面，排水法可用来精确求得树木任一部分的立方材积。
The displacement method, on the other hand, can be used to obtain accurately the cubic volume of any part of the tree .
等长且堆放成捆的原木材积由人工检尺测得，会产生很大误差。
There is large error in manual measuring equal length and heaping log volume.
两种源单株材积随林龄加大，差异增大，但增长百分比随之减少。
The differences in single tree timber volume enhance with the increase of stand ages, but the increasing percentage decrease.
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.
模型检验进一步证明该模型系统提供了最好的直径和材积预测精度。
Model validation further confirms that this model system provides the best precision of diameter and volume prediction.
本文系统研究了水平角规在固定样点监测材积生长动态中的理论与方法；
This paper systematlly deals with the applied theory and method of angle measuring in volume growing estimation in permanent point sampling.
在林业生产实践中，用灰色系统模型预测人工林材积生长率有其适用价值。
It is worth while to apply the gray system model to predict the forest growth in practice.
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.
松针红蜡蚧虫口密度与针叶变黑呈正相关，受害木的材积生长率受到较大影响。
The population density shows a positive correlation to the blackening degree of the needle.
经过实验证明，本嵌入式系统基本满足木材材积检测的准确性、效率性和实用性。
The results indicate that this embedded system satisfy the elementary need for veracity, efficiency and practicability of the log volume measuring.
桐粮间作能在一定程度上提高农作物品质和产量，且能增加泡桐材积，提高经济效益。
The intercropping system can not only increase quality and output yield of crops, but also increase the paulownia volume and economical benefit.
尤以用带皮材积公式估算去皮材积比用去皮材积公式估计要准确，平均只小2.3%。
For debarked trees, the volume equation for trees with barks was actually more accurate, underestimating volume at average rate of 2.3%.
给出了按不同的区分方法和求积算法计算树干材积的方法、程序及相应的材积误差率。
It shows the methods to calculate the trunk volume by different sectional ways and product calculation methods and programs, as well as relevant error ratios of timber volume.
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.
据此，在利用材积密度法估计树干干重时，相同树种不同个体可以采用统一的平均密度值。
Same average density can be used to estimate stem dry weight of the same species of trees.
立木材积表是森林经营中必不可少的工具，材积表的精度直接影响森林调查结果的可靠性。
Standing stock table is a necessary tool for forestry management, whose precision directly affects the reliability of the forest survey.
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。
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.
建立了病害发生的短期测报模型和材积损失率估测模型，确定了病害的防治指标和经济阈值。
Short term forecast model of disease development and wood loss rate are built. Control guideline and economic threshold value are decided.
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。
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.
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.
论述贵州现用一元立木材积表存在的问题和误差来源，对原材积式与新材积式进行误差对比及适用性检验。
This paper analyzed errors and their origins in Timber Volume Table (TVT) of Guizhou Province and deemed it imperative to revise TVT.
论述贵州现用一元立木材积表存在的问题和误差来源，对原材积式与新材积式进行误差对比及适用性检验。
This paper analyzed errors and their origins in Timber Volume Table (TVT) of Guizhou Province and deemed it imperative to revise TVT.
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