树干解析

词组短语

stem analysis

与树干解析相关的网络例句 [注：此内容来源于网络，仅供参考]

This paper expounded the growing characteristics of Larix gmelinii classified stem (dominant stem,average stem,overtopped stem) and analyzed the relation between the growing characteristics of classified stem and its stand factors and locality factors by setting plots and making trunk analysis.

本文通过设置样地，作树干解析，阐明了兴安落叶松天然林分级木(优势木、平均木、被压木)生长特性，并分析了分级木生长特性与林分因子和立地因子的关系。

The errors caused by traditional methods in stem analysis can be significant, but these methods are still used in forest measuration.

讨论了树干解析中被忽略的2个问题，即直径和树皮体积的测定方法的严密性。

And Prunus maackii Rupr ,we caculated the datas of 40 mean trees and dominant trees from 20 temporary test plots by software of IBMPC program,analyzed the growth progress of tree height,DBH and volume of Prunus padus L.

采用临时标准地法，对20块标准地的40株平均木和优势木进行了树干解析，采用IBMPC系列程序集对所得数据进行计算，以分析稠李、斑叶稠李树高、胸径和材积的生长规律。

Baesed on community investigation, trunk analysis, the growth law of DBH, height and volume and the population characteristics of Tsuga krngibracteata and Fokienia hoginsii in Qiyunshan Natural Reserve, Jiangxi Province were studied.

在群落调查与树干解析的基础上，对齐云山自然保护区长苞铁杉与福建柏两种珍稀植物的生长过程及种群发展动态进行研究。

Dead branches or knots in different sizes of tree was studied and different branch development phases of growth,suppression,death and self-pruning was analyzed to evaluate the effect that knot size and distribution impact on timber quality.Branch and knot dynamic models were developed using stand and tree variables.Based on multipleunit stepwise regression method, the individual tree growth model was established using forest and crown factors as the variable. The best taper equation model of Larix olgensis was bucking data of 130 sample trees selected in the studied area.

本研究以不同年龄、不同密度及不同立地条件的落叶松人工林作为研究对象，基于19块标准地中95株标准木的树干解析、枝解析及节子剖析数据，揭示了不同林分条件下林木的枝条数量及在树冠内的空间分布格局、生长发育规律；研究了不同大小树木的死枝和节子大小及其变化规律，分析了枝条的生长、被压、寿命和自然整枝过程，评价了节子大小和分布对木材质量的影响；以林分变量、林木变量和着枝深度等为自变量建立枝条生长和节子大小的动态预测模型；选择林分因子和林木的树冠因子作为竞争因子，用多元逐步回归的方法建立落叶松人工林与距离无关的单木生长模型，并根据研究地区选取的130株造材样木数据，建立了落叶松人工林最佳削度方程。