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天然林,natural forest
1)natural forest天然林
1.Study on the sustainable management of natural forests and the construction of modern forestry enterprise——Taking Fujian Yong an Forestry(Group)Jiont-stock Co.Ltd.as a case;天然林可持續經營與現代林業企業建設研究——以福建永安林業(集團)股份有限公司為例
2.Comparison of fiber morphology of Michelia tsoi wood between plantation and natural forest;樂昌含笑人工林和天然林木材纖維形態特征的比較
3.Gap regeneration of Picea crassifolia natural forest in Qilian Mountains.;祁連山青海云杉天然林林隙更新研究
英文短句/例句

1.A forest or wooded area in its natural state.天然林,原始林天然狀態的樹林或林區
2.Research of Spatial Distribution Pattern for The Schrenk Spruce Forest;天山云杉天然林林分空間格局的研究
3.Natural Forest Protection Program.天然林資源保護工程。
4.The Research of Natural Forest Classification and Management Technology of Fangzheng Forestry Bureau;方正林業局天然林分類經營技術研究
5.Comparative Study for Undergrowth Vegetation Biomass of Eucalyptus Plantations and Natural Forest;桉樹人工林與天然林林下植被生物量比較研究
6.Characteristics of Stand Regeneration of Two Forest Types in Natural Larix gmelinii Forest興安落葉松天然林2種林型林分更新特征
7.Cost-effectiveness Analysis of Plantation and Natural Forests--A Case Study of Artificial Larch and Natural-fir in Jingouling Forest Farm人工林與天然林經濟效益分析——以金溝嶺林場人工落葉松林與天然云冷杉林為例
8.Natural Forest Protection:an Overview Abroad and a Review at Home;國外天然林保護概況及我國天然林保護的進展與對策
9.Good results were achieved in projects for reforesting formerly cultivated land and protecting natural forests.退耕還林和天然林保護工程建設取得成效。
10.- Protecting natural forest resources, carrying out afforestation and improving the ecological environment.——保護天然林資源,開展植樹造林,改善生態環境。
11.A Study on Forest Landscape Classification and Planning for the Natural Forest Areas in the Northeast of China;東北天然林區森林景觀分類及規劃的研究
12.C Reserves and Various SOC Fractions in Natural and Plantation Forests of Castanopsis Kawakamii;格氏栲天然林與人工林碳庫及土壤碳形態
13.Community Forestry and the Sustainable Development of NFPP Communities;社區林業與天然林保護社區的可持續發展
14.Study on Use of Forest Stand Management Method for Natural Forest Management;借鑒“林分施業法” 開展天然林經營的探討
15.Comparison of Spatial Structure for Natural and Semi-natural Mixed Forests in Jingouling Forestry Farm,Jilin Province of China金溝嶺天然和半天然混交林林分空間結構比較
16.Gap Dynamics in a Secondary Coniferous Forest of Guandi Mountain關帝山天然次生針葉林林隙動態研究
17.Study on the Quantitative Analysis of the Oak Natural Secondary Forest in Baotianman Nature Reserve;寶天曼櫟類天然次生林林分結構量化分析
18.Investigation of Growth Regularity of Arisaema in the Secondary Forest of Zuojia左家天然次生林中天南星的生長規律
相關短句/例句

natural forests天然林
1.Stand variables affecting understorey plant species diversity in natural forests;影響天然林下層植物物種多樣性的林分因子的研究
2.Conservation and sustainable management technology for natural forests in Yunnan Province.;云南天然林保護與可持續經營技術研究
3.Ecological classification system for China s natural forests: protection and management;試論生態分類系統在我國天然林保護與經營中的應用
3)nature forest天然林
1.Growth regularity of nature forest of Chosenia arbutifolia;鉆天柳天然林生長規律的研究
2.The growth model of Castanopsis fissa nature forest created using a computer;用計算機模擬閩粵栲天然林生長模型
3.On nature forest protection and degraded ecosystem restoration in Northwest China.;西北地區天然林保護與退化生態系統恢復理論思考
4)natural forest天然森林
1.In the Huangjiahe river basin of Yunnan,the natural forests cover an area of 185493 hm~(2),accounting for 66.依據2001~2003年10~12月共4次調查所獲的樣地資料和野外記錄,按《云南植被》(1987)的植被分類原則,將黃家河流域的天然森林植被分為3個植被型,4個植被亞型和6個群系。
5)Natural forest region天然林區
1.Through the dynamic changes analysis of forest resourees and volume of timber forest for five times continual forest inventory of natural forest region in Gansu province, the conclusion is drawn as follows: the volume increased from the year 1979~1988, and decreased from 1988~1996, but later regained it s increase from 1996~2001.通過對甘肅省天然林區5次森林資源連續清查蓄積量及用材林蓄積量變化的分析,初步得出結論:1979~1988年甘肅省天然林區蓄積量為增長階段,1988~1996年蓄積量屬減少階段,1996~2001年為增長階段。
6)natural bamboo forest天然竹林
延伸閱讀

天然林天然林natural forest t ionron}in天然林(nalljr沮lbrest)自然發生的森林。它包括原始林和次生林。原始林是自然發生,并未經人工培育或人為干擾的森林;次生林是在自然或人為因素干擾破壞后的次生裸地上自然演替形成的森林。在世界的森林中大部分屬天然林,中國天然林的面積和蓄積量分別占森林總面積和蓄積量的3/4和9/10以上。 中國天然林大致可分為6個水平帶和兩個林區,即寒溫帶(亞寒帶)針葉林帶,溫帶針葉落葉闊葉混交林帶,暖溫帶落葉闊葉林帶,北亞熱帶含常綠闊葉的落葉闊葉林帶,中南亞熱帶的常綠闊葉林帶,南亞熱帶、熱帶雨林和季雨林帶,以及甘南、川西、滇北和藏東南區的峽谷高山針葉林區和西北區的山地針葉林區(參見彩圖插頁第49頁)。 天然林與人工林相比,有如下特點:①植物種類豐富。在天然林中除建群種外,還有伴生樹種、下木、幼樹和其他活地被物。②層次結構復雜。森林植物的層次結構從上到下,一般可分為喬木層、亞喬木層、下木層、灌木層、本層和苔鮮地衣層以及層外植物等。③維護生態平衡的貢獻大。由于其物種豐富和層次結構復雜,森林穩定,它在提高地力、防止水土流失和凈化水質以及改善生態環境的作用較大。④生命周期和演替系列較長。原始林或停止干擾的次生林,一般是進展演替,最終走向頂極,形成頂極群落。 天然林(參見彩圖插頁第49頁)是大自然賜予人類的寶貴財富,愛護森林應是人類共同的職責。為了維護人類生存環境和滿足物質生活的需要,利用森林天然更新的能力,經營好天然林乃是林業工作的一項主要內容。(賴世登)
韩国伦理电影