1.
A forest or wooded area in its natural state.
天然林，原始林天然状态的树林或林区
2.
Research of Spatial Distribution Pattern for The Schrenk Spruce Forest;
天山云杉天然林林分空间格局的研究
3.
Natural Forest Protection Program.
天然林资源保护工程。
4.
The Research of Natural Forest Classification and Management Technology of Fangzheng Forestry Bureau;
方正林业局天然林分类经营技术研究
5.
Comparative Study for Undergrowth Vegetation Biomass of Eucalyptus Plantations and Natural Forest;
桉树人工林与天然林林下植被生物量比较研究
6.
Characteristics of Stand Regeneration of Two Forest Types in Natural Larix gmelinii Forest
兴安落叶松天然林2种林型林分更新特征
7.
Cost-effectiveness Analysis of Plantation and Natural Forests--A Case Study of Artificial Larch and Natural-fir in Jingouling Forest Farm
人工林与天然林经济效益分析——以金沟岭林场人工落叶松林与天然云冷杉林为例
8.
Natural Forest Protection:an Overview Abroad and a Review at Home;
国外天然林保护概况及我国天然林保护的进展与对策
9.
Good results were achieved in projects for reforesting formerly cultivated land and protecting natural forests.
退耕还林和天然林保护工程建设取得成效。
10.
- Protecting natural forest resources, carrying out afforestation and improving the ecological environment.
——保护天然林资源，开展植树造林，改善生态环境。
11.
A Study on Forest Landscape Classification and Planning for the Natural Forest Areas in the Northeast of China;
东北天然林区森林景观分类及规划的研究
12.
C Reserves and Various SOC Fractions in Natural and Plantation Forests of Castanopsis Kawakamii;
格氏栲天然林与人工林碳库及土壤碳形态
13.
Community Forestry and the Sustainable Development of NFPP Communities;
社区林业与天然林保护社区的可持续发展
14.
Study on Use of Forest Stand Management Method for Natural Forest Management;
借鉴“林分施业法” 开展天然林经营的探讨
15.
Comparison of Spatial Structure for Natural and Semi-natural Mixed Forests in Jingouling Forestry Farm,Jilin Province of China
金沟岭天然和半天然混交林林分空间结构比较
16.
Gap Dynamics in a Secondary Coniferous Forest of Guandi Mountain
关帝山天然次生针叶林林隙动态研究
17.
Study on the Quantitative Analysis of the Oak Natural Secondary Forest in Baotianman Nature Reserve;
宝天曼栎类天然次生林林分结构量化分析
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长规律