查询词典 forest tree

The result pointed out that the vertical distribution of foliage for each species was different,however,generally speaking,the foliage in upper crown (0.3CL) for broad-leaved species in natural secondary forest took a small percentage,about 10%;in middle or middle lower of the crown(0.4CL to 0.8CL) the branches here took the majority percentage of whole foliage,almost 60%to 75%;but in lower crown(0.8CL),there was about 10%of whole foliage.(5)The interspecies competition of trees in secondary forest was expressed by Hegyi competitioin index,and the active competitor was calculated by the competition zone radius and the tree position,DBH,and distance in the zone,it was not all competitors in tranditional calculation.The study introduced crown area overlap index to describe the crown competition between subject tree and its competitors,furthermore,the crown area was classified into 5 levels with a method of equal crown projection area,therefor,the resulting crown area overlap index showed more realities of existing stand conditons.(6)Based on the theoretics of multiply divide,the spatial strcture optimizing model of secondary forest stand selective thinning was developed by diversity mingling,aggregation index,competition index and crown area overlap index,also designed 10 constraint conditions which were related to forestry meanings,the objective function was solved by the implicit enumeration method with LINGO 9.0,using 0-1 integer programming.

并且得出，每个树种在树冠内相对高度上的叶量的垂直分布是不同的，天然次生林阔叶树种的叶量在树冠的上部(0.3CL以下)所占比例很小，约占10%左右；在树冠的中部以及中下部(0.4CL～0.8CL)，叶量所占比例最大，几乎集中了整个树冠60%～75%的叶量；而在树冠的下部(0.8CL以下)，几乎占很少的叶量，大约10%左右。5、采用Hegyi竞争指数来表现次生林内林木的竞争关系，并且根据竞争圈的大小和林木在竞争圈内的分布位置、大小与距离来计算有效的竞争木，并不是传统意义上的全部竞争木；本研究提出用树冠叠加指数来表示林木与周围树木的树冠竞争情况，并采用等树冠投影面积法把树冠分为5级，这样计算的树冠叠加指数更加与现实林分相符。6、本研究基于乘除法的思想，用多样性混交度、聚集指数、竞争指数和树冠叠加指数构建了天然次生林择伐空间优化模型，设计了10个与林学意义相一致的约束条件，并采用0-1整数规划的思路，在LINGO9.0软件中使用了隐枚举法对目标函数求得最优解。7、以M702标准地为应用实例，具体计算出了每株采伐木，经过择伐后，目标函数值按模型设计的要求发生了极大的改变，增加了5倍多，说明了最后这个解的优良性，满足了设计的要求。

Through discussing the urban forest connotation, this paper pointed out some existing problems of tree species selection in present urban forest culture, and raised the urban forest culture tree species selection principle.

通过对城市森林内涵的探讨，指出了当前城市森林培育中树种选择存在的一些问题，提出了城市森林培育树种选择的原则。

Populations of evergreen broadleaved forest community was divided into five size classes: seedling, sapling, small tree, middle tree and big tree class by tree's boot diameter and diameter at breast height.

根据树木的地径和胸径，把常绿阔叶林群落种群分为幼苗、幼树、小树、中树和大树等5个大小级。

The essay analyzes the present forest green GDP calculability system and finds that it has not formed the unified theory and method to the forest resources value calculability,the forest accounting is uncoordinated with the statistical calculability,and its calculability scope is inconsistent with the way,also has not the institution of the forest calculability system and so on.

通过对现行森林绿色GDP核算存在的森林资源价值核算没有形成统一的理论与方法、森林的会计核算与统计核算不协调、核算范围与途径不一致、没有相关的森林核算制度等问题进行分析后认为，必须尽快建立统一的森林绿色GDP 核算体系

In compliance with the objective route of historical development, and based on time and its contents, forest tourism culture in Zhejiang are divided into four periods: formation period, development period, prosperity period, and approaching modern times period; based on its representation of characteristics, it can be divided into origin and transition period, classifying and humanizing landscape and fusing forest period, enjoying and appreciating landscape and the climax of forest period, sight-seeing, exploring landscape and the science of forest period.

本论文应用历史研究的方法，从深入挖掘、系统整理史迹材料着眼，分析研究浙江森林旅游文化的渊源和流变，遵从历史发展的客观线索，按时间和内容将其分为形成期、发展期、繁荣期、走向近代的浙江森林旅游文化等四个时期；按其特征表现分为起源和过度期，归宿、"人化"山水和森林融合期，游览、欣赏山水和森林高潮期，观赏、探索山水和森林科学期等。

The study is carried out that the comparison of fine root production, decomposition and distribution along with Korean pine and broad-leaved climax forest succession; the fine root contribution to the belowground C and N storage along with Korean pine and broad-leaved climax forest succession; and the comparison of belowground C and N storage among the Korean pine and broad-leaved climax forest, three dark-conifer forests, a betula ermanii forest along altitude.

研究内容包括：原始阔叶红松林及其不同演替阶段的次生林中细根的生长和周转、分解与分布的特征，阐明在不同演替阶段细根的变化；原始阔叶红松林及其不同演替阶段的次生林中细根对根系、土壤和林地地下的碳、氮贮量的影响，分析在不同演替阶段细根周转对地下碳、氮贮量的贡献；以及对不同垂直海拔高度分布的不同类型的原始森林中细根和根系生物量的变化，及细根对根系、土壤和林地地下碳、氮贮量的贡献进行了研究。

In the 20 yr forest, 304. 6gm〓 C and 11. 6gm〓 N are inputted to the soil. In the 80 yr forest, 502. 3gm〓 C and 17. 2gm〓 N are inputted to the soil. In the climax forest, 430.3gm〓 C and 11. 9gm〓 N are inputted to the soil. Along with forest succession, the C inputted to the soil B layer by fine root increases because of the deepening of root depth distribution.

白桦山杨幼林、白桦山杨成熟林与原始阔叶红松林中，细根每年向林地周转的碳量分别为304.6gm〓、502.3gm〓、430.3gm〓，氮量分别为11.6gm〓、17.2gm〓、11.9gm〓；其中，随着演替的进行，由于根系分布的加深，细根每年向土壤B层周转的碳量会逐渐增加。

Along with the Korean pine and broad-leaved climax forest succession (a 20 yr Populus davidiana and Betula platyphylla secondary forest, an 80 yr Populus davidiana and Betula platyphylla secondary forest and the Korean pine and broad-leaved climax forest), the peak production of fine root is in early summer and autumn.

在原始阔叶红松林的演替过程中（白桦山杨幼林—白桦山杨成熟林—阔叶红松林），细根生长的季节变化特征是生长顶峰出现在初夏和秋季。

Shanlinsi Forest Recreational Park is located more than 2000 meters above sea level. Looking over the forest, it is full of towering cedars and cypresses with a natural and primitive breath of air. In this vast forest area, there is a well-known pristine eco-forest and dead cryptomeria trees standing tall in the swamp. Such desolate beauty makes people feel really lonely.

海拔超过二千公尺的杉林溪，放眼过去尽是高耸的杉树、桧木林，有著自然而原始的气息，而在这片面积广大的森林中，有一片鲜为人知的原始生态林、一片因为九二一阻塞河道形成的沼泽地，一棵棵死亡的柳杉笔直的朝向蓝天，有种孤寂、苍凉的美感。

In the same depth, the content of total nitrogen of broad-leaved deciduous forest in 0~10 cm depth is maximum ,and the average total nitrogen of the bamboo forest is maximum in 10~20 cm and 20~30 cm. The available phosphorus content of broad-leaved deciduous forest is minimum, and the available phosphorus content of coniferous forest is minimum, the deviancy is very big, which is mainly related to the human being's activities and the way of soil usage.

同一土层深度，落叶阔叶林在0~10cm土层全氮含量最高，而毛竹林在10~20cm和20~30cm土层全氮含量都超过落叶阔叶林，使得毛竹林在土壤平均全氮含量为最高；各种森林类型中以阔叶林尤其是落叶阔叶林的速效磷含量最高，而针叶林的速效磷含量最低，空间变动性很大，这主要和人类活动及土壤的利用方式有关。

"Yes, now you can give yourself airs," she said, you have got what you wanted.

"对了，您现在高兴了，"她说道，这是您所期待的。

Then the LORD said to me: Rebel Israel is inwardly more just than traitorous Judah.

上主于是对我说：＂失节的以色列比失信的犹大，更显得正义。