age of stand

According to their dispersed Iaw analysed statistically , the relationship of round sample plot and crown closure , and the structure between age of stand and factors of tree measuring have been shown .

对其客观分布规律进行统计分析，揭示了样圆与郁闭度的关系，以及林龄与各测树因子之间的结构。

Based on the data collected from fixed sample plots , the intermediate felling age of stand with different site index was determined , which used the average annual - growth and discrete density of diameter at breast height as the indicator .

以固定样地观测资料为依据，以林分平均胸径连年生长量及胸径离散度为指标，确定不同地位指数林分间伐的起始年龄；

For Shanghai urban plantation density is larger , the condition of forest decline phenomenon obviously , in order to analyze the density of urban plantation forest growth and forest stand structure , the influence of the different forest age of stand density effect .

针对上海城市人工林密度偏大、林分衰退现象明显的状况，为了分析密度对城市人工林林木生长发育及林分结构的影响，研究不同林龄的林分密度效应，探讨城市人工林的自维持机制。

The outturn table of each wood assortment can be applied in practice , and also in calculating the technical cutting age of the stand .

林分材种出材率表可以应用于生产实践，也可用于计算林分工艺成熟龄。

The distillation of a life 's worth of wisdom and insight into an elegant expression of a coherent worldview , The Age of Turbulence will stand as Alan Greenspan 's personal and intellectual legacy .

作者将其一生的智慧学识和观察浓缩在这本书之中，传达他一以贯之的世界价值观，本书将成为格林斯潘送给人类社会最珍贵的智慧遗产。

A study on age structure model of bamboo stand and its application

毛竹林丰产年龄结构模型与应用研究

A Study on Age Structure of Shrenk Spruce Stand

天山云杉林年龄结构的研究

These models take into account the change in the ratio of forest biomass and volume with the stand age and the effect of stand age on forest NPP .

所建模型克服了将森林生物量与其蓄积量之比作为常数的不足，并考虑了林龄对于森林生产力的影响。

With stand age increasing , biomass of stand average tree and each organ increase . The annual growth speed of biomass is the biggest at 18 22 year for stand average tree , but the biggest at 12 18 year for the stand .

林分平均木及林分各器官生物量均随林龄增加而增加，平均木在1822a生物量年增加速率最大，而林分是在1218年生。

According to the age group of area of order : middle age of stand young forest near-mature forest mature forest overmature forest in the research area , sapling occupies 86.2 % of the total area , grove and only 5.35 % .

按各龄组面积排序为：中龄林〉幼龄林〉近熟林〉成熟林〉过熟林，中、幼龄林占据了研究区总面积的86.2%，成熟林只有5.35%。