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.

通過對(duì)現(xiàn)行森林綠色GDP核算存在的森林資源價(jià)值核算沒有形成統(tǒng)一的理論與方法免费黄色网站在线播、森林的會(huì)計(jì)核算與統(tǒng)計(jì)核算不協(xié)調(diào)、核算范圍與途徑不一致无码激情免费视在线观看、沒有相關(guān)的森林核算制度等問題進(jìn)行分析后認(rèn)為黄色一及亚洲，必須盡快建立統(tǒng)一的森林綠色GDP 核算體系

The increased NPP was primarily led by an advanced growing season for broadleaf evergreen forest, needle_leaf evergreen forest, and needle_leaf deciduous forest, whilst that was mainly due to enhanced vegetation activity during growing season for broadleaf deciduous forest, broadleaf and needle_leaf mixed forest, broadleaf trees with groundcover, perennial grasslands, broadleaf shrubs with grasslands, tundra, desert, and cultivation.

常綠闊葉林、常綠針葉林和落葉針葉林NPP的增加主要由生長(zhǎng)季節(jié)的提前所致摸,吸,操,插,干，而落葉闊葉林未满18岁禁止进入的网站、針闊混交林、矮林灌叢欧美一级黄片黑人操逼、溫帶草原及草甸欧洲精彩性视频一区二区14、稀樹草原、高寒植被看的黄色网站、荒漠以及人工植被NPP的增加主要來自生長(zhǎng)季生長(zhǎng)加速的貢獻(xiàn)色久综合国产一区99精品。

Firstly, analyzing the dynamic changes and the problems existing in the forest ecosystem in the researching area; Secondly, taking Xishui natural conservation station as the example, vectoring the picture of Forest construction in Xishui natural conservation station through using Arcview and Arc/info software, and utilizing the landscape indices to analyze the changes and problems of the arbor forest and bush forest in the forest ecosystem.

首先分析了研究區(qū)森林生態(tài)系統(tǒng)的動(dòng)態(tài)變化及其存在問題；其次以西水自然保護(hù)站為例www内射学生妹羞羞视频，運(yùn)用Arcview和Arc/info軟件對(duì)1992年和2001年的西水自然保護(hù)站1：50000林相圖進(jìn)行矢量化處理18岁以下禁看黄色网站免费，并利用景觀指數(shù)分析了森林生態(tài)系統(tǒng)中喬木林、灌木林的變化及其存在問題91精品美女主播在线。

Although forest insects and pathogens cause various detriments,they also make positive contributions to forest succession,material cycling and energy flow,a food source,creating wildlife habitat,etc.,and further,in an ecosystem perspective their contributions are critical to forest biodiversity,soil fertility and long-term forest health and sustainability,so forest managers must consider both the detrimental and beneficial functions of insects and pathogens.

森林昆蟲和病原物雖然能引起林木損傷與死亡成人免费国产剧情视频网站在线观看，但它們?cè)谏盅萏妗⑽镔|(zhì)循環(huán)和能量流動(dòng)久久精品aⅴ无码中文字字幕重口、食物來源超碰在线播放人人、創(chuàng)造野生動(dòng)物生境等方面都作出了積極的貢獻(xiàn)，而且在一個(gè)生態(tài)系統(tǒng)發(fā)展前景中国产亚洲精品无码专区，對(duì)于森林生物多樣性呦呦性爱视频网站、土壤肥力、森林的長(zhǎng)時(shí)期健康和穩(wěn)定性等方面高大丰满40岁东北少妇，它們的促成作用也是必不可少的色com。因此，森林經(jīng)營(yíng)者應(yīng)當(dāng)考慮昆蟲和病原物的害與益的兩方面作用国产一区二区电影在线观看。

The concept system on forest carrying capacity is framed, and "forest actual carrying capacity"and"forest maximum carrying capacity" and"forest carrying quantity"and"forest carrying index"are defined in this paper.

3在明確了森林承載力評(píng)價(jià)的目的欧美一级性交试看視頻，確立了森林承載力評(píng)價(jià)的原則和時(shí)空尺度的基礎(chǔ)上，建立了森林承載力評(píng)價(jià)的概念模型和邏輯框架91在线免费观看视频，為森林承載力的評(píng)價(jià)提供了基本思路日韩精品国产。

By the analysis of the dead leaves and branches and the holding water contents of five type standing forests—birch and larch mixed forest, larch planted forest, Chinese pine planted forest, birch natural forest and shrub forest in Wutai Mountain area, central Asia alpine region, the water conservation benefit among them was compared.

為了探討不同林分水源涵養(yǎng)功能，為地域林業(yè)發(fā)展樹種規(guī)劃提供技術(shù)依據(jù)国产乱理伦片在线观看，該研究以中亞高山區(qū)五臺(tái)山林區(qū)內(nèi)五種不同類型林分為試材美女张开腿让男人桶爽动漫视频，調(diào)查分析了不同林分的枯落物及其持水量，比較了不同林分類型的涵養(yǎng)水源效益日韩高清视频免费观看。

The water conservation benefit of soil for different forests was 277.28%-173.67% higher than that of grass slope, among them, the highest one was birch and larch mixed forest, the followings were larch planted forest, Chinese pine planted forest, birch natural forest, and the lowest one was natural shrub forest.

林地土壤的涵養(yǎng)水源效益比荒草坡高277.28%~173.67%未满十八禁止18以下免费的AV，其中白樺落葉松混交林最高，落葉松人工林、油松人工林欧美性爱影视网站、白樺天然林次之亚洲黄色网站WWW，灌木林最低。

In this paper,based mainly on the heights above sea level of the upper limits of the modern dark coniferous forest zones in some mountainous regions and the climatic data obtained from 102 meteorological stations in China,the theoretic altitude of the forest line has been calculated and maps showing the altitude isolines of the forest line,the isolines of height differences between the permafrost limits and the forest line and the isolines of height differences between the modern climatic snowline and the forest line in China have been constructed respectively.

本文主要根據(jù)我國(guó)一些地區(qū)現(xiàn)代暗針葉林帶上限的海拔高程和102個(gè)氣象臺(tái)站的氣象資料亚洲三级小说，計(jì)算出我國(guó)的森林線的理論海拔高度国产亚洲综合无码一区二区，并編繪出我國(guó)的森林線高程等值線圖以及多年凍土線與森林線高差等值線圖和現(xiàn)代氣候雪線與森林線高差等值線圖。

Firstly, according to study dynamic changes of the elements structures in succession about natural and artificial forest, then summarized regular patterns;at the same time.based on the study of Coupling Relationship between structure and function of water conservation forest established the ideal structures from the stand level and the watershed level. The ideal structures from the stand level: uneven-aged, double layer and mixed structure, and trend to natural forest. The watershed level followed the same principle, that is double layer patches, uneven-aged forest well-distributed and to build up different forest patches in watershed.

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The system implemented forest fire model selection automatically and intelligently. BP artificial neural network model of forest fire model selection was build by treating forest fire environment data as inputting variable and treating appropriate forest fire model as outputting variable. At the same time, we studied the methods of acquiring and calculating data of inputting and outputting. The system implemented machine of model selection automatically based on dynamic data driven technology. We selected 72 items experimental data from historical forest fire records in Beijing to experiment and confirm the validity of model selection. It turned out that the reliability of model selection is more than 80 percent.

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