Between these extremes lie the sal -dominated moist deciduous forest of eastern India; the teak -dominated dry deciduous forest of central and southern India; and the babul -dominated thorn forest of the central Deccan and western Gangetic plain.

在印度的上述熱帶雨林帶和針葉樹(shù)林帶之間黄片高清无码在线观看，印度東部以潮濕性落葉林帶的婆羅雙樹(shù)為主，印度南部和中部則以干旱落葉林帶的柚木樹(shù)林為主亚洲一区在线不卡，印度中部的德干高原和恒河平原則以熱帶旱生林帶的阿拉伯相思樹(shù)為主。

Woodpecker is a well-known forest birds that feed, in addition to eradication of pests such as bark beetle larvae than its wood chisel marks can be used as an indicator of forest health logging, which is known as the forest a doctor.

啄木鳥(niǎo)是著名的森林益鳥(niǎo)国产精品有限公司，除消滅樹(shù)皮下的害蟲(chóng)如天牛幼蟲(chóng)等以外黄片a级a级a级，其鑿木的痕跡可作為森林衛(wèi)生采伐的指示劑国产wwwww视频，因而被稱為森林醫(yī)生。

Woodpecker Woodpecker is the famous forest birds that feed, in addition to eradication of pests such as bark beetle larvae than its wood chisel marks can be used as an indicator of forest health logging, which is known as the forest a doctor.

啄木鳥(niǎo)啄木鳥(niǎo)是著名的森林益鳥(niǎo)爆乳网站，除消滅樹(shù)皮下的害蟲(chóng)如天牛幼蟲(chóng)等以外黄色网站免费入囗，其鑿木的痕跡可作為森林衛(wèi)生采伐的指示劑，因而被稱為森林醫(yī)生熟女操B视频。

Niche breadths of most native populations in natural forest were wider than that of P. armandii forest. Furthermore, competitions among populations were not so strong, and community structure was more stable, because of great niche differentiation in natural forest.

天然林中大多數(shù)鄉(xiāng)土樹(shù)種的生態(tài)位寬度較之在華山松林中大為增加bbixx国产av，但由于長(zhǎng)期協(xié)同進(jìn)化，種間生態(tài)位分化程度高久久婷婷香蕉热狠狠综合，種間競(jìng)爭(zhēng)較緩和国产吞精口爆一区二区，群落具有很高的穩(wěn)定性。

Therefore, with some engineering and biological measures, after some pioneer trees are planted in extremely degraded tropical areas,the pioneer forest should be reformed by multilayer and multispecies broad leaved mixed forest in time, wihich could accelerate the development of artificial forest into local climax community.

因此国产乱伦视频免费观看，對(duì)于極度退化的熱帶丘陵臺(tái)地區(qū)国产高中三级视频，在一定工程和生物措施基礎(chǔ)上，用先鋒綠化樹(shù)種造林成功后亚洲专区第一页，及時(shí)用多層多種的闊葉混交林改造原有先鋒林最新国产小视频在线观看，可以加速人工林向地帶性植被類型演替。

The forest was characterized with phanerophyte evergreen plants with single-mesophyll-leathery leaves, which reflected the nature of tropical Karst mountainous seasonal rain forest.(2). Community succession was divided into five stages by using Cluster method, PCA method; the succesion stages include herbaceous stage, scrub-shrub stage, small tree stage, arbor stage and climax seasonal rain forest stage.(3). Based on similarity theory, succession sere was constructed with the community similarity equation formed.

結(jié)果表明：(1)森林群落在外貌上又大又硬视频，以常綠高位芽波罗一级黄色视频、單葉、革質(zhì)偷拍照片网、中型葉植物為主男人插女人逼逼的视频，反映了熱帶巖溶山地季雨林的特點(diǎn)；(2)運(yùn)用聚類分析国产毛片在线看、PCA排序等方法將群落演替階段劃分為草本群落階段日日插人人插、灌叢階段、小喬木階段国产A片址一网、喬林階段欧美黑人XXXX性高清视频、頂極季雨林階段；(3)運(yùn)用相似學(xué)原理亚洲sanji在线，組建群落間相似度方程并以此方程構(gòu)建了群落演替系列www.99riav.m3u8；(4)研究表明桂西南巖溶區(qū)生態(tài)系統(tǒng)健康受到嚴(yán)重脅迫。

On the basis of systematic analysis and review of the current researches, an forest restoration evaluation indicator system on scale of forest type had been developed, in which seven indexes were selected including the species richness, stand volume, species diversity, conspicuousness, coverage, degree of closeness and height of forest communities. The index weight value were calculated by the analytic hierarchy process.

在系統(tǒng)分析和整合了現(xiàn)有研究成果的基礎(chǔ)上美女黄色视频A毛片，初步構(gòu)建了包括物種豐富度国产白拍一国产专区、林分蓄積量、物種多樣性人人操人人上人人看、顯著度午夜不卡巨屌、蓋度、郁閉度及群落高度7個(gè)指標(biāo)的林型尺度森林植被恢復(fù)評(píng)價(jià)指標(biāo)體系，采用層次分析法計(jì)算出指標(biāo)權(quán)重亚洲一区少妇视频。

The studys object is bitch forest .spruce forest ,fir forest, chrysanthemum alp, willow community and two couch grass, so the research of the soil microorganisma,soil enzymatic activity in the subalpine coniferous forests in western Sichuan is significant to china .

因此日韩亚洲专区，開(kāi)展對(duì)川西地域中獨(dú)特的生態(tài)環(huán)境中土壤微生物群落、以及與碳氮循環(huán)有關(guān)的土壤功能微生物數(shù)量和酶活性等的分布特征研究精品国产AV天天更新，進(jìn)一步揭示川西亞高山植物群落的生態(tài)學(xué)過(guò)程已成為一項(xiàng)重要的研究課題国产又粗又大又湿又色。

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...

本文在統(tǒng)計(jì)森林資源小班檔案卡片有關(guān)資料的基礎(chǔ)上，把現(xiàn)實(shí)林分與法正林相比較黄色视频在线观看免费网，用法正林學(xué)說(shuō)來(lái)指導(dǎo)全場(chǎng)森林的調(diào)查日韩成人网址播放器在线播放免费。并提出了一個(gè)新的觀點(diǎn)：在整個(gè)經(jīng)營(yíng)單位內(nèi)，培育不同生長(zhǎng)速度日韩一级精品在线视频，不同主伐年齡WWW囯产播放，齡級(jí)期不同的用材樹(shù)種，森林的齡級(jí)結(jié)構(gòu)呈反"J"形分布此法正分布更有利于維持各齡級(jí)面積的相對(duì)穩(wěn)定日韩在线国内自拍视频网站，并且国自产拍精品自拍，年伐量的波動(dòng)不大，有利于森林的永續(xù)利用玖玖玖re96在线视频。

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試驗(yàn)示范區(qū)建設(shè)黄色在线三区，結(jié)合大量的國(guó)內(nèi)外文獻(xiàn)分析，從中觀和宏觀角度亚洲香蕉视频综合在线，采用邏輯推理與實(shí)證分析国产精品女人被喂j8、定性分析與定量分析、生態(tài)學(xué)和其他學(xué)科相結(jié)合等方法人人操人人干人人揉日日揉日日操，討論了森林屬性的歷史演變和現(xiàn)代健康觀久久精品国产亚AV香蕉，對(duì)森林健康進(jìn)行了重新的定義，首次嘗試建立了基于中國(guó)林情的森林健康基本理論體系浓毛欧美老妇乱人伦视频在线，構(gòu)建了森林健康的評(píng)價(jià)方法久久精品无码一区二区国产盗，結(jié)合文獻(xiàn)研究對(duì)城市森林、農(nóng)田防護(hù)林裸体偷拍91视频、馬尾松林久久久久久精品免费免费hd、筍用雷竹林的健康評(píng)價(jià)進(jìn)行了理論驗(yàn)證，并通過(guò)江西信豐崇墩溝流域森林健康評(píng)價(jià)進(jìn)行了案例分析中文在线一页。