对油松天然林的林分结构进行了研究。
Natural forest stand structure of Pinus tabulaeformis was studied.
林分结构是林分功能的基础和表现。
Stand structure is the foundation and manifestation of stand functions.
采用两点回收、差分还原的途径实现林分结构的预测。
The prediction can be made by the two-point recovery and difference restoration.
必须加强用材林林分抚育使其达到合理的林分结构以使其经济效益最大化。
Therefore, appropriate stand tending measures should be taken to improve the forest structures of timber forest, so as to gain the optimum economic benefits.
本文根据林分结构和森林产量长期实验林的研究成果，提出了刺槐林的抚育作业次序。
In the paper the sequence of forest tending operations in black locust stands is proposed, based on results of long-term stand structure and forest yield trials.
但由于存在着物种选择、模式配置和林分结构不合理，导致大多数经济林水土保持效果较差。
However, the species choosing, mode disposition and the unreasonable forestry structure has resulted in the bad effect of water and soil conservation.
但森林削减坡面径流与侵蚀的效益与森林树种自身的生物、生态学特性及其林分结构状况等密切相关。
However, the reducing benefits of runoff and erosion of forests has a highly correlation with the tree species' biological, ecological property and its stands structural status.
在人工林构建中，只有模拟天然林结构，从害虫原栖息地抗虫林分结构出发，才能从根本上解决猖獗成灾问题。
As long as the plantation simulate for forest structure and take use of the component of anti - insect in its habitat, we can solve the problem for pest disaster.
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；
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.
提出决定褐环粘盖牛肝菌等菌根食用菌子实体能否发生和发生最大产量的根本因素是共生树种类型、立地、林分结构、土壤；
It pointed out the main factors determining the growth of fruit bodies of the edible fungus Suillus luteus and the greatest yield were accompanying tree species, site, forest stand structure and soil;
应用森林健康理论，分析得出威胁祁连山森林健康的主要自然灾害为病虫鼠害、雪折、风倒滑坡、气候干旱及森林组成和林分结构不合理；
According to the theory of forestry health, the forestry health in Qilian Mountain is affected by mice pest, snow break, landslide, drought and unreasonal forestry stand structure and so on.
因此，在制定正确的森林经营决策之前，首先必须建立林分生长与收获模型，以掌握林分结构、生长动态、货币收获变化规律，并预测林分对即将实施措施的反应。
Thus, the growth and obtain models must be established before making the proper manage decision, the structure and grow dynamic and obtain change rule of the stand will be grasped by the models.
具有时间因素的初始林分，是“耗散结构”的起点。
The primary stands containing time factors was the start of "dissipative structure".
作为应用实例，对一块小叶松林分直径结构的变化进行了动态模拟和预测。
As an example of the application, the changing structure of the diameter of an even-aged Jack pine stand is simulated and forecasted.
研究了“陈山杉”林分的形状结构与材性特点。
Wood properties of "Chenshan Chinese fir" and the structure of its stand were also studied.
依据历年调查资料，对麻池背油松天然林的林分生长结构进行了研究。
Based on survey resources in the past years, natural forest stand structure of Pinus tabulaeformis in Machibei was studied.
火干扰并未完全地破坏森林，仅仅是导致林分中不同地点上林分组成和红松径阶结构的差异明显。
Fire disturbance only led to a significant difference in stand composition and diameter class structure for the stands at different locations, rather than completely destroying the forest.
然而林分是一个结构复杂、影响因子多且相互关联的生态系统，其生长周期长，且对所实施的管理决策的容错性差，这些特点给合理的经营决策增大了难度。
But the stand is a ecosystem with complicated structure and many related influence factors. Add to the long growth period long, it is difficult to carry out the proper management policy.
在对洮河林区云杉、冷杉林分调查研究的基础上，探讨现实林分的结构、生长、更新、演替等规律。
Picea and abies forests in Taohe forest region have been investigated in order to find out the laws governing their structure, growth, rejuvenation and succession.
判定低质低效林的依据是林分的结构、林木个体质量、密度和郁闭度、灌木林结构和功能。
Forest structure, individual quality, tree density and crown density, and structure and function of brush forest are used to construct a criterion to the LQBF.
这种概率分布是由内部时间定向的，可用以描述阔叶林分未来的结构状态。
This probability distribution was directed by "inside time" and it indicated the structure state of broad-leaved forest in the future.
但蓄积量大幅下降，林分的龄组、密度结构严重失调，林分生长量偏低。
But stand volume descents to a great extent, age class and stand density structure are maladjusted badly, and the number of stand growth is low.
同时还研究了林分平均净生产量和产量结构。
The structure of output and productive forces have been examined.
由于TM卫星影像分辨率的限制，很难分别出林分垂直结构的差异。
Due to the resolution limit of TM imagery, it is difficult to distinguish the forest variety in vertical structure.
为了改善林分质量、恢复原有森林结构和功能，有必要对低质林分进行改造。
In order to restoring the original forest structure and function, improving the quality of forest stands, it is necessary to transform low-quality forest.
森林的空间结构反映了森林群落内物种的空间关系，研究林分空间结构的目的是为经营提供科学依据。
The forest spatial structure had reflected in the forestry species spatial relations. The goal of studying the forest spatial structure is to provide basis for forest management.
文中简要概述了树轮分析在森林干扰、群落动态、森林结构、林分更新方式以及高山林线研究方面的进展。
This paper briefly outlined the advance of dendroecology research in terms of forest disturbance, population dynamics, forest structure, forest regeneration patterns and alpine timberline.
文中简要概述了树轮分析在森林干扰、群落动态、森林结构、林分更新方式以及高山林线研究方面的进展。
This paper briefly outlined the advance of dendroecology research in terms of forest disturbance, population dynamics, forest structure, forest regeneration patterns and alpine timberline.
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