查询词典 rain forest

Based on the information taken from the subcompartmental records a comparison between the actual and normal forests was made and a new point of view was proposed in the article: in the case of cultivating timber-forest which is different in cutover age, age class and growing speed within the range of the whole forest station, the forest age class distribution showing the opposite shape of "J" is of more benefit to keeping the relative stability of all the age class area than the age class distribution of th...

本文在统计森林资源小班档案卡片有关资料的基础上，把现实林分与法正林相比较，用法正林学说来指导全场森林的调查。并提出了一个新的观点：在整个经营单位内，培育不同生长速度，不同主伐年龄，龄级期不同的用材树种，森林的龄级结构呈反"J"形分布此法正分布更有利于维持各龄级面积的相对稳定，并且，年伐量的波动不大，有利于森林的永续利用。

Based on the Sino-US Forest Health Cooperation Program, along with review on lots of foreign and domestic literatures, the historical trends of attributes of forest and the concept of health in the modern society are discussed and the concept of forest health is redefined, combining the methods of logic discursion with demonstration analysis, qualitative analysis with quantitative analysis and the ecology with other related science from point view of macro and middle scope aspects.

本研究依托中美森林健康试验示范区建设，结合大量的国内外文献分析，从中观和宏观角度，采用逻辑推理与实证分析、定性分析与定量分析、生态学和其他学科相结合等方法，讨论了森林属性的历史演变和现代健康观，对森林健康进行了重新的定义，首次尝试建立了基于中国林情的森林健康基本理论体系，构建了森林健康的评价方法，结合文献研究对城市森林、农田防护林、马尾松林、笋用雷竹林的健康评价进行了理论验证，并通过江西信丰崇墩沟流域森林健康评价进行了案例分析。

But most natural forests were transformed into the artificial cultivated ecosystem—such as farmland, orchard, tea garden, economic forest, artificial forest, and others-which was result from the managing action by mankind such as disforest and reclamation, building plantation. It presented diversification of forest ecosystem conversion mode.

在历史上，中亚热带山地生态系统的自然植被基本上为天然常绿阔叶林，但由于人类的经营活动(如毁林开辟耕地、营造人工林等)，大部(来源：A85BC论文网www.abclunwen.com)分天然林已转变为人工栽培用途的生态系统(如农田、果园、茶园、经济林、人工林等)，呈现出多样化的森林生态系统转换模式。

The domestic forest fire accidents occurs frequently, which has a devastating disserve to our society and caused a serious loss to our economy. Forest fire resulted in a lot of forest resource was burnt, the entironment and zoology balance were effected, industry and agriculture production were influenced directly, sometimes even reduced the people's life and property in a low safety situation.

国内森林火灾事故的频繁发生，其破坏性危害对社会影响极大，给我国的经济造成了相当严重的损失，森林资源大量烧毁，自然环境和生态平衡受到影响，直接影响工农业生产，甚至威胁人民的生命财产的安全。

ABSTRACT Global carbon cycle is a very important issue in the study of global climate change. Forest ecosystem carbon cycle is one of the important part of global carbon cycle, but at the present time there are considerable uncertainties in the research of global carbon cycle, which also exist in forest ecosystems carbon cycle research, especially in the estimation of carbon storage of region forest ecosystems and CO〓 fluxes exchanging with other systems.

全球碳循环是全球气候变化研究的核心问题之一，森林生态系统碳循环是全球碳循环的重要组成部分，目前在全球碳循环的研究中还存在很大的不确定性，这种不确定性同样存在于森林生态系统碳循环的研究中，尤其表现在对区域森林生态系统碳库大小及其与大气CO〓交换通量的估计上。

It is applied in this paper for larch forest harvest regulation in Qianqiugou Forest Farm, Guancenshan Forest Management Bureau, Shanxi Province.

分层序列法是一种多目标决策方法，本文将其用于山西省管涔山森林经营局千秋沟林场落叶松经营类型的森林收获调整。

In plantation management, APP GXFMC reserves buffer strip, sets up firebreak, plants trees of various species and clones. Plantation forms natural mixed forest in group with nearby indigenous forests. Plantation and surrounding environment compose a perfect ecosystem together. Thereby biodiversity is improved. And forest regulation and control capacity is enhanced. Forest capacity of prevention from disease and pest is increased, too.

APP广西林务在营林中，保留缓冲带、设置防火隔离带、种植不同的树种和不同品系的树林，与周边乡土林成自然块状混交，使人工林与周围环境形成了一个良好的生态系统，从而提高了生物多样性，提高了森林的自我调控能力，增强了森林自身抗御病虫害的能力。

Engineering multi-targets and outer-benefits of conversion cropland into forest, modulation flaccidity of forest asset collocated market were analyzed in a new point, after conversion cropland into forest. Relations and focuses of different main bodies were cleared, and a result indicated that benefit maintenances and inner drive collocations of main bodies were the key of follow-up policies.

从新的视角分析了退耕还林工程运营目标的多元性、效益的外部性、退耕还林工程后林木资产配置市场机制调节的软弱性，理清了退耕还林工程不同主体之间的关系及关注的侧重点，得出了培育后续产业维护经营主体利益、调动经营主体的内在动力是后续政策关键的结论。

They are: fishing in the big river, Aunting on the horse in the forest, hunting on the prairie, hunting on foot in the forest Ⅰ(the main body is Yakut-Ewenki) and Hunting on foot in the forest Ⅱ(the main body is Han, Man and Koreans).

本文着重分析了"北方渔猎文化带"，这条文化带从大兴安岭中段开始，沿大兴安岭和嫩江，从西南向东北，一直延伸到大兴安岭西北坡和东北段，然后折向东南，沿伊勒呼里山、小兴安岭和黑龙江，最后，到黑龙江、松花江和乌苏里江三江汇合处。

The patterns and changing of The Changbai Mountain forest ecosystem services affected by human activities were explored in this paper. The impact of human activities on Changbai Mountain forest ecosystem services include positive effects and negative effects, they were expatiated in the paper. The positive effects include protecting idioplasm resources, wildlife and natural landscape, and forest fireproofing, and so on. The negative effects contain the capacity of biodiversity, purifying environment, regulating climate, buffering disaster and supplying product etc.

摘 要：本文分析了人类活动对长白山森林生态系统服务功能影响的方式和利弊，并将其影响分为正面影响和负面影响进行阐述，其中正面影响为生物种质资源保护、野生动植物资源保护、森林防火、自然景观保护等；负面影响为生物多样性维持能力下降、影响生态系统对大气和气候的调节过程、削弱净化环境的能力、影响水文调节能力、影响灾害缓冲能力、降低生态系统产品供给能力、改变营养物质的贮存和循环过程等。

After oxidation, pH value of the surface of carbon black has a specific relation with the volatile content.

氧化后炭黑表面的pH值与挥发分之间有一定的关系。

Knowing that such a person is warped and sinful; he is self-condemned.

因为知道这等人已经背道，犯了罪，自己明知不是，还是去做。