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林木
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  forest
    EXPLOITATION OF WASTE-HILLY RESOURCES AND DEVELOPMENT OF ECONOMIC FOREST IN YUNYANG COUNTY, CHONGQING CITY
    重庆市云阳县开发荒山资源,发展经济林木
短句来源
    The paper summarized ecological programming study at home and broad and went through study of optimal forest ecological programming in Hainan province.
    在对国内外生态规划研究综述的基础上,通过对海南省最优森林生态规划的研究指出:要使海南省林地、林木和森林环境服务的效益最大,必须调整用材林、防护林、特用林和竹林的面积比例。
短句来源
    Establishment of Dynamic Evaluating System Model for Forest Assets
    林木资产动态评估系统模型的建立
短句来源
    Existing Problems of Logging Management in the Northeast and Neimenggu Forest Regions
    东北及内蒙古林区林木采伐管理中存在的问题
短句来源
    Raising Innovation Sense and Developing Industry Economy of Forest Seeds and Seedlings in Jiangxi
    增强创新理念 发展江西林木种业经济
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  “林木”译为未确定词的双语例句
    Relationship Between Wood Productive Cycle and Asset Price of Forestland
    林木生产周期与林地资产价格的关系
短句来源
    Study on the Applies of TQM for Raising Seedlings
    TQM在林木育苗中的应用研究
短句来源
    The Analysis of the Problems of Industrialization of the Forestry's Seeds in Jiangsu Province
    江苏林木种苗科技产业化问题分析
短句来源
    Study on the Benefit Mechanism Problems about the Technology Industry of Forestry Seeds in Jiangsu Province
    江苏省林木种苗科技产业利益机制问题研究
短句来源
    Discussion about Cutting Program Managing Internal Cost Settlement
    林木采伐计划管理内部结算成本问题的探讨
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  forest
Moreover, a backward reasoning forest of a reachable marking was generated for explicitly representing reachable paths in RBS.
      
Growth Model System for National Continuous Forest Inventory
      
A Growth Model System is developed for data updating and forecasting of the national continuous forest inventory.
      
Its design is based on the inherent forest growth laws, and its parameters are estimated by modern regression methods.
      
It is suitable for forest resource information updating and forecasting for a large region, e.g., a province.
      
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  stand forest
Hardwood stand forest floor soil materials had the lowest C:N ratios (mean=23), compared with mixedwood (mean=27) and softwood stands (mean=33).
      
Multi-stand Forest Management under a Climatic Risk: Do Time and Risk Preferences Matter
      
We propose a stochastic dynamic programming framework to model the management of a multi-stand forest under climate risk (strong wind occurrence).
      
If no overlap constraints are violated, the tree is added to the artificial stand/forest.
      


In this paper, a concrete measure dealing with the problem of agricultural environmental conservation and the construction of an ecological agriculture experimental district in the south and north mountainous region of Dazu County has been proposed. It was regarded that planting fruit trees and increasing forest covering areas were permament solutions. Grass planting and developing herbivorous stocks may enable the production of agroecosystems to achieve a even higher leve of productivity,make its structure...

In this paper, a concrete measure dealing with the problem of agricultural environmental conservation and the construction of an ecological agriculture experimental district in the south and north mountainous region of Dazu County has been proposed. It was regarded that planting fruit trees and increasing forest covering areas were permament solutions. Grass planting and developing herbivorous stocks may enable the production of agroecosystems to achieve a even higher leve of productivity,make its structure more stable, and its function more complete.Controlling agricultural environmental pollution was considered the fundamental measure for improving the quality of the environment and promoting its healthy and sound development. To develop the township enterprises and to change the rural economic structure could effectively reduce the burden on limited land resources and to implement its rehabilitation. Birth control and raising the quality of population assures the protection and reformation of the whole agricultural environment.

本文就大足县南北山生态农业试验区农业生态环境保护和改造问题提出了具体对策,认为植树种果,提高林木覆盖是治本之策;大力种草,发展草食牲畜,可使农业生态系统的生产达到一个更高的层次,使其结构更加稳定,功能更加齐全;治理农业环境污染,是提高生态环境的质量,使之健康地良性发展的必要措施;大办乡镇企业,改变农村经济结构,可以有效地降低土地资源的负荷,实现资源的休养生息;控制人口数量和提高人口素质,则是整个农业生态环境得到保护和改造的可靠保证。

There has been a great progress and change both in the theoreticaland applied research field of tree improvement in the world during thelast 20 years. This paper briefly reviews the main new concepts and ach-ievements comprehensively on basis of the literature published abroad inrecent over 10 years. It deals with the long-term tree breeding, breedingpopulation, supplemental mass pollination, mass vegetative propagationof juvenile materials etc. On the basis of comparing the recent status inthis field in China...

There has been a great progress and change both in the theoreticaland applied research field of tree improvement in the world during thelast 20 years. This paper briefly reviews the main new concepts and ach-ievements comprehensively on basis of the literature published abroad inrecent over 10 years. It deals with the long-term tree breeding, breedingpopulation, supplemental mass pollination, mass vegetative propagationof juvenile materials etc. On the basis of comparing the recent status inthis field in China with those mentioned above in foreign countries, thestrategies and orientation of China's research efforts are recommended topromote the development of tree improvemental works in the future.

本文介绍了80年代国际林木遗传改良领域一些新的研究成果和应用趋势,并把我国的研究现状与国际上出现的新情况作了比较,提出加快我国林木改良速度和提高工作效果的对策。

The workshop series on tree breeding strategy of Swedenwere held in Uppsala, Sweden, from October 1983 to February 1984.It was organized by the Department of Forest Genetics SLU and gu-ided by Dr Hyun Kang, population geneticist of Forest Service, De-partment of Agriculture, U.S.A. Most important forest geneticists and tree breeders from differ-ent areas in Sweden attended the workshop, so did the scientists fromother Universities and Nordic countries. Beginning with introduction of new concepts of tree breeding...

The workshop series on tree breeding strategy of Swedenwere held in Uppsala, Sweden, from October 1983 to February 1984.It was organized by the Department of Forest Genetics SLU and gu-ided by Dr Hyun Kang, population geneticist of Forest Service, De-partment of Agriculture, U.S.A. Most important forest geneticists and tree breeders from differ-ent areas in Sweden attended the workshop, so did the scientists fromother Universities and Nordic countries. Beginning with introduction of new concepts of tree breeding sy-stem and strategy, participants did a series of exercises combiningtheir experience and knowledge in tree breeding with the new conce-pts. The organizers and participants exchanged opinions repetedly,reviewed and analysed the history of the practice on tree breedingin Sweden, and reached agreement on the whole in the following as-pects: (1)The decision of long-term tree breeding strategy in Swedenwas adopted; (2)The work was redivided and coordinated among the four existent organizations involved in tree breeding to constitute anoverall frame in accordance with the strategy, and information exch-ange among the four organizations is to be enhanced: (3)Tree breed-ing populations with rational distribution and well-conceived designare to be used as the main form and conservation for tree species;(4)Six focuses were determined to develop in breeding techniques andmulti-discipline cooperation approach was recommended to solve diff-icult technical problems; (5)The outlines of the plan to establish br-eeding populations for Norway Spruce and Scots Pine in long-term br-eeding for Sweden were proposed in accordance with the above stra-tegy and system. The author recognized that the contents and organizing work of the workshop were worth referencing for China. Researchin the tree breeding strategy for major tree species of China shouldbe set about.

文中详细介绍了瑞典林木育种战略系列研究的内容及形式。

 
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