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economic forest     
相关语句
  经济林
     The area of forestland increased from 68.94 thousand ha to 109.05 thousand ha,in which the areas of farmland shelterbelt,economic forest,fuelwood forest and the forest for special use account for 25.68%,20.39%,14.09%,12.09%,10.59%,8.78% and 8.39%respectively.
     林地面积由原来的6.894万hm2增加到10.905万hm2,固沙林、饲料林、草原防护林、农田防护林、经济林、薪炭林、特用林分别占25.68%、20.39%、14.09%、12.09%、10.59%、8.78%、8.39%。
短句来源
     Prediction on the domestic and international market demand for economic forest products(1996-2010)
     经济林产品国内外市场需求预测(1996-2010年)(续)
短句来源
     Prediction on the domestic and international market demand for economic forest products(1996—2010)
     经济林产品国内外市场需求预测(1996—2010年)(续)
短句来源
     Forecast on the domestic and international market of economic forest products(1996-2010)
     经济林产品国内外市场需求预测(1996-2010年)
短句来源
     Forecast on the domestic and international market of economic forest products(1996—2010)
     经济林产品国内外市场需求预测(1996—2010年)
短句来源
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  经济林木
     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
     It was investigated the harm of zokor for economic forest in Guyuan replacing agriculture by afforestation, the result showed that there was a marked correlative relation between the zokor density and the death rate of forest, y=-1.923 4+3.432 0x(r=0.934 8).
     对固原退耕还林区经济林木鼠害情况进行调查。 结果表明:林木死亡率与鼢鼠密度之间呈显著相关关系:y=-1·923 4 +3·432 0x(r=0·934 8)。
短句来源
     Experiment on Culture of Economic Forest Trees in Southwest Mountain Land of Zhejiang Province with Higher Altitude
     浙西南较高海拔山地经济林木栽培试验研究
短句来源
     Financial Assessment of Demonstrated Engineering of High-value Economic Forest Tree Cultivation at Hot Areas and Ecological Restoration of Degraded Mountainous Areas
     热区高价值经济林木培育与退化山地生态恢复治理示范工程建设财务评价
短句来源
     Study on the Economic Threshold Value for Zokor Control of Economic Forest in Guyuan Replacing Agriculture by Afforestation
     固原退耕还林区经济林木甘肃鼢鼠防治经济阈值研究
短句来源
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  经济树种
     Twenty eight economic forest tree species in Anhui Province were used to investigate the species,occurrence and dynamics of economic forest insects.
     选择安徽省 2 8种主栽及名特经济树种为主要对象 ,经过 1 988年至 1 995年 8年的调查研究 ,探明当前各经济树种害虫种类、发生现状与趋势。
短句来源
     Analysis was made on current situation of economic forest production and on significance of ecological and economic forest development in China.
     通过实地调查与资料收集,对生态经济树种及生态经济林进行了定义,分析了我国经济林的生产现状及发展生态经济林的意义。
短句来源
     Based on the natural and economic conditions of Zhejiang Province, the writers describe the significance of developing famous, special and excellent economic forest products, introduce the status of production, selection and breeding, and propose the strategies for the cultivation with improved varieties.
     本文根据浙江省的自然地理和经济条件,论述了发展名特优经济树种的意义,介绍了该省经济树种的生产和良种选育现状,提出了实现名特优经济树种良种化的策略。
短句来源
     Economic forest is an important developmental way of forestry industrialization.
     营林产业化是现代营林事业的发展方向,而发展经济林尤其栽培当地市场前景广阔、经济价值高的经济树种,是营林产业化经营的订措施与重要途径。
短句来源
     Analysis of resistance to sulfur dioxide and nitrate dioxide of economic forest seedling
     经济树种苗木对二氧化硫和二氧化氮的抗性分析
短句来源
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  经济林型
     The synthesis by the above-mentioned technique is used, and having built up has the good ecology benefit, the optimization model of ecology forest landscape, economic forest model landscape and the ecology economic forest landscape of society benefit having a higher economic performance and notable.
     通过上述技术的综合运用 ,建成了既有良好的生态效益 ,又有较高的经济效益和显著的社会效益的生态林景观、经济林型景观和生态经济林景观的优化模式。
短句来源
     The scenic and recreational forest in Beijing can be divided into mountainous area and plain scenic and recreational forest, the plain scenic and recreational forest can be divided into economic forest, garden, isolating greenbelts, green route;
     北京市风景游憩林分为山区型与平原型两大类,平原型又划分为经济林型、花园型、片林型、通道型等四类。
短句来源

 

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      economic forest
    4) The transition probabilities of deserted forest, economic forest, Pinus tabulaeformis forest, Populus spp.
          
    2) The area of some forest patch types, especially shrub forest, economic forest, Populus spp.
          
    The mean extension index ofRobinia pseudoacacia forest, non-forest, shrub forest, sparse forest, andQuercus species forest increased rapidly, but that of economic forest became zero.
          
    The landscape were classified into 10 types of cropland, forest, shrub land, economic forest, grassland, build up land, river, lake, swamp, and unused land.
          
    The research result provided theoretical evidence for selecting low-pollution economic forest crops in the water source protection area in Miyun Reservoir.
          
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    In order to study laws of soil and water loss of tropical rainforest andthe exploitation and utilization of its land.We have carried out the field-plotexperiment of water loss and soil erosion in southern Yunnan for six yearsfrom 1962 to 1967. The results of the study are summarized as follows: 1. The seasonal variation of soil and water loss in southern Yunnan isvery obvious,it may be divided into three different periods on the basis of soiland water loss during six years. (1) The period of slight soil and...

    In order to study laws of soil and water loss of tropical rainforest andthe exploitation and utilization of its land.We have carried out the field-plotexperiment of water loss and soil erosion in southern Yunnan for six yearsfrom 1962 to 1967. The results of the study are summarized as follows: 1. The seasonal variation of soil and water loss in southern Yunnan isvery obvious,it may be divided into three different periods on the basis of soiland water loss during six years. (1) The period of slight soil and "water loss in hot and dry season(Feb.to May). (2) The period of severe soil and water loss in rainy season(Jun.toAug.). (3) The period of slight soil and water loss in cold and cool season(Sep.to Jan.of next year). 2. The general law is that the runoff,the soil erosion and the runoffcoefficient increase with every increase of rain capacity and rainfall intensity in this region. 3. In different exploitation,the soil and water loss of the rubber-teacommunity is 22.3% and 29.7% 1ower than that of a pure rubber plantation,and 95.7% and 93.9% lower than that of farm crop.Therefore,to transformfarm land into rubber-tea community or economic forest land of two storiesis a better way to utilize tropical mountainous area rationally and to decreaseloss of soil and water. 4. The results of the study still shows that the loss of soil and water onthe farm land of shifting cultivation is the most serious.It is 778.3 times and34.5 times that of tropical rainforest,and 6.6 times and 5.7 times that ofbench terrace respectively.In order to restore the function of tropicalrainforest ecosystem and to prevent the loss of soil and water on farm land inthis region,wé must safeguard tropical rainforest against deforestation.Wemust change of the slope land to contour terrace,and reform step by stepthe cropping system of shifting cultivation into that of rational rotation ofcrops,these are efficient measures to raise soil fertility,keep water and soil,fix farm land and obtain high yield of crops.

    本文根据6年的径流试验结果,讨论了滇南热带雨林及其不同垦殖利用土地水土流失的一般规律;探讨了本区不同降雨特性与水土流失的相互关系;分析了不同耕作方式、不同群落结构、不同覆盖植物和不同利用方式对水土流失的影响,并提出了本区如何合理利用热带山区土地资源,发展农、林生产和保持水土等措施。

    After the founding of New China, under the leadership of the Communist Party, the production of economic forests in our country has been increased many times botq in area and output. The scientific researches, such as the researches on choice and breeding of good seeds, high-yield cultivation and, insects and diseases control, have also been fruitful. Some of them have even changed into productive forces.

    建国以后,在党的领导下,我国经济林生产在面积和产量上都成倍地增长。经济林科研在良种选育、丰产栽培、病虫防治等方面都取得了一批成果,有的已经变为生产力。

    Located in an important geographical place, the Southern Sichuan Economic Zone has a long history. Its climate, water conservancy, coal, natural gas, rock salt, sulphur ore, economic forest and tourst resoarces occupy a dominant position in Sichuan Province. For this reason, it possesses natural conditions for the establishment of a base of energy, chemical and light industry, timber forest and handicraft, and the development potencialities are enormous.

    本文讨论的川南经济区,行政上指自贡、泸州两市和宜宾地区,它位于四川盆地南部,面积29508平方公里,人口1116.2万,分别占四川5.19%与11.13%。本区是四川重要的农业区和化学、机械、食品、造纸工业基地。分析和探讨本区的国土资源及其优势,阐明工农业的现状及其特点,提出今后合理开发与利用,对四川今后的国土规划与整治,实现本世纪末国民经济总产值翻两番都有重要意义。

     
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