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community
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  群落
    Studies on Character of Community Structure of the Ecological Forest and Its Quality Control in Zhejiang Province
    浙江省生态公益林群落结构特征及其调控研究
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    Study on the Ecophysiology of Sabina Vulgaris Community at the Different Successional Stages in Mu Us Sandland
    毛乌素沙地臭柏群落不同演替阶段生理生态学特性的研究
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    STUDY ON THE STRUCTURE OF THE LARCH WOOD COMMUNITY
    人工落叶松林群落结构的研究
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    STUDY ON THE WATER CONDITION OF ANEUROLEPIDIUM CHINENSE COMMUNITY
    羊草群落水分状况的初步研究
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    STUDY ON THE NUMERICAL CLASSIFICATION AND SUCCESSION OF INSECT COMMUNITY IN THE CITRUS ORCHARDS OF GUIZHOU
    贵州柑桔园昆虫群落的数量分类及演替研究
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  小区
    Greening Plants Design of the City Residential Community
    城市居住小区绿化种植设计
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    Results showed that the tree density below 90 trees /hm~2 in 25% of the communities,too sparsely, the density structure of community was irrational.
    结果表明,25%的群落中木本植物密度低于90株/hm~2,居住区绿地群落树种丰富度和多样性最高,综合加权平均值达2.23和2.05,多样性值很高的有些群落外貌显得很乱,比如幸福小区,而多样性值为0的昭乌达路行道树群落则过分单调。
短句来源
  植物群落
    MAIN WOODY SPECIES NICHE OF PLANT COMMUNITY IN DAQINGGOU
    大青沟森林植物群落主要木本植物生态位研究
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    A Study on the Interspecific Association of Monimopetalum chinense Community
    永瓣藤植物群落种间联结研究
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    Study on Ecological Structure of the Ornamenfal Plants Community in Shanghai
    上海城市园林植物群落生态结构的研究
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    Investigation on Species Abundance of Gardening Plant Community in Shanghai City
    上海城市园林植物群落的物种丰富度调查
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    Analysis on the Forest Community Species Diversity in Xiuning County of Anhui Province
    安徽休宁县森林植物群落物种多样性分析
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  “community”译为未确定词的双语例句
    Studies on the Community Structure and Diversity of the Forest Plant and Arthropod in Wuling Mountain
    雾灵山森林植物与节肢动物群落结构及多样性研究
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    Parameters of energy flow in paddy field community.
    稻田生物群落的能流参数
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    A Study of Community Features and Biomass of Alnus cremastogyne Fuelwood Forests
    桤木薪炭林群落学特征及生物量的研究
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    Development and Significance of Community Forestry
    乡村林业的发展及其意义
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    DEVELOPMENT, POLICIES AND LEGISLATION OF THE COMMUNITY FORESTRY IN CHINA
    中国村社林业的发展与政策立法
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  community
That such a factorization is possible is well-known to algebraists (and expressed by the formulaSL(n;R[z, z-1])=E(n;R[z, z-1])); it is also used in linear systems theory in the electrical engineering community.
      
Following the methodology of community ecology, the total root mass of a phytocommunity is measured as cubic volume.
      
The RENIs of three community types (Picea crassifolia + Hippophae rhamnoides ssp.
      
The standing crop of N in the plant community was 1,025.28 kg/hm2, accumulation in the litter layer was 224.88 kg/hm2, and reserve in the soil was 55,151 kg/hm2.
      
Compared with other forest types, cycling rate of N in the community was lower than in deciduous broad-leaved forests, rain forests, and mangroves, and was moderate in evergreen broad-leaved forests.
      
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Methods of soil and vegetation survey generally used for forest trees in mountainous areas are considered inapplicable to poplars growing as scattered trees on the levelland. In the present paper, therefore, a method catering for this purpose together with the result of its application to poplar sheltabelts in East Honan is presented. In soil survey, besides detailed profile descriptions, field determinations of important soil properties, including water permeability, volume weight, moisture content, texture,...

Methods of soil and vegetation survey generally used for forest trees in mountainous areas are considered inapplicable to poplars growing as scattered trees on the levelland. In the present paper, therefore, a method catering for this purpose together with the result of its application to poplar sheltabelts in East Honan is presented. In soil survey, besides detailed profile descriptions, field determinations of important soil properties, including water permeability, volume weight, moisture content, texture, ground water table and composition, thickness and depth of clay layer, pH value, available N and available P have been obtained. All the data are later annalysed and interpreted from two rather different but complementary approaches. On the first hand, by the calculation of correlation coefficient, correlation between height growth of Populus pyramidalis and ground water tables is found to be significant (r=0.458 P<0.05), and correlation between height growth of this species and volume weight of soil at root-concentrating horizon highly significant (r=0.804 P<0.01). But correlation coefficient between height growth of the same species and all other studied soil properties fall below the significant leyel generally adapted i.e. 5% level. Secondly, on the comparative study of field determinations of soil properties and height measurements of this species, ground water tables with reference to tree heights are divided into 3 classes, soil textures 4 classes, pH values (at root-concentrating horizon) 3 classes, and volume weights 3 classes respectively. In vegetation survey, qualitative investigations are carried out following the ZurichMontpellier School's procedures with but a few modifications, and total estimation, sociability, aspect, life form, root system and plant height are recorded. Also, point quadrat method is employed to collect quantitative data such as cover and frequency. Populetum pyramidalise association is classified into two subassociation:P. Pyr. Imperata cylindrica subassociation and P. Pyr. Imperata cylindrica var. major subassociation respectively. The latter is further classified into Lactuca variant and typical variant. To the above-mentioned plant community units and their respective differential species, a weighted mean of the class value with respect to each soil property is calculated separately. On this basis their indicating values to the growth of the tree are interpreted. Meanwhile, quantitative criteria of soil properties and a list of plant indicators (including individual species and community units) for the choice of planting sites of Populus pyramidalis in the studied area are given. Lastly, merits and demerits of the present method are discussed.

大多数杨树为平地散生树种,一般山地森林土壤与植被的调查方法不完全适用。本文介绍了一种野外调查与分析材料的方法,以及在河南睢杞林埸,试用于美杨(防护林带为主)的结果。调查土壤时,除剖面调查外,并对一些土壤特性,其中包括透水性、容重、土壤水分、地下水(水位与水质)、质地、粘质层(深度与厚度)、pH值、铵态氮、速效P_2O_5进行了野外观测。观测结果采用了两种分析方法:一方面采用相关系数的统计方法,计算结果,地下水位与美杨树高生长的相关显著=0.458,P<0.05),根系集中层容重与美杨树高生长的相关极显著=0.804,P<0.01),其余土壤特性与美杨树高生长的相关均低于统计学上的一般显著标准;另一方面从理论与野外观测的结果,将地下水位分为3级,质地4级,粘质层3级,透水性3级,pH值(根系集中层)3级,容重3级,并分别找出了各级美杨的树高生长情况。植被稠查分估舒描远(质的稠查)与数量航箭二种,前者主要采用法瑞学派的方法,稠查填目舒有:总估舒度、攀度、物候相、生活型、根系、高度等填;后者采用点样法,点样法架用薄木板与铁杆做成,稠查杭舒盖度与频度二稠。美福拿丛按区别种分为二个亚拿丛:印度白茅亚拿丛与中国白茅亚拿丛...

大多数杨树为平地散生树种,一般山地森林土壤与植被的调查方法不完全适用。本文介绍了一种野外调查与分析材料的方法,以及在河南睢杞林埸,试用于美杨(防护林带为主)的结果。调查土壤时,除剖面调查外,并对一些土壤特性,其中包括透水性、容重、土壤水分、地下水(水位与水质)、质地、粘质层(深度与厚度)、pH值、铵态氮、速效P_2O_5进行了野外观测。观测结果采用了两种分析方法:一方面采用相关系数的统计方法,计算结果,地下水位与美杨树高生长的相关显著=0.458,P<0.05),根系集中层容重与美杨树高生长的相关极显著=0.804,P<0.01),其余土壤特性与美杨树高生长的相关均低于统计学上的一般显著标准;另一方面从理论与野外观测的结果,将地下水位分为3级,质地4级,粘质层3级,透水性3级,pH值(根系集中层)3级,容重3级,并分别找出了各级美杨的树高生长情况。植被稠查分估舒描远(质的稠查)与数量航箭二种,前者主要采用法瑞学派的方法,稠查填目舒有:总估舒度、攀度、物候相、生活型、根系、高度等填;后者采用点样法,点样法架用薄木板与铁杆做成,稠查杭舒盖度与频度二稠。美福拿丛按区别种分为二个亚拿丛:印度白茅亚拿丛与中国白茅亚拿丛,后者复分为黄鼠草类型与标准类裂。对于所有区别种与擎落,均采用加权平均方法,爵算出其对土壤特性的数量指标,并圃明其对美格生长的指示意义。根据满查桔果,提出了在稠查地区内美揭适宜生长的土壤条件的数量指标,以及指示植物与攀落。最后甜渝了所用方法的优缺点。

The ecological factors influenced the way of cutting and regeneration of the tropical mountain rain forest was discussed. Basing on the investigation on characteristics of water and heat regime, the authors tried to build a model of high-yielding forest for the tropical region of China. The paper also explained the effect of the forest on the environment, depending greatly on the forest structure. It was relevant to the growth of younglings and selfrestoration. Loss of water and erosion of soil in the clear...

The ecological factors influenced the way of cutting and regeneration of the tropical mountain rain forest was discussed. Basing on the investigation on characteristics of water and heat regime, the authors tried to build a model of high-yielding forest for the tropical region of China. The paper also explained the effect of the forest on the environment, depending greatly on the forest structure. It was relevant to the growth of younglings and selfrestoration. Loss of water and erosion of soil in the clear cutting land were very serious, even if the native tree species from original forest were adopted for afforestation in such area, they were unable to grow well in such a changed environment. The importance of protectifig climax community was well shown.

本文讨论了热带山地雨林采伐更新方式的生态环境因子。作者在研究水热变化特征基础上,试图为我国热带地区建立一个高生产力的森林模式。文中并阐述了森林对环境的影响,这一影响是依赖森林结构而变化的,并与幼树生长和天然更新有关。皆伐迹地水土流失严重,即使采用附近原始林的树种造林,因环境改变生长不良。显示了保护顶极群落的重要性。

Based on the tree and undergrowth species diversity measurement of 11 fore- st communities in Guangdong subtropic,this paper deals wilh the distributional regularity and practice importance of forest species diversity. preliminary results are: (1)The species diversity increases from coniferous forest to coniferous- broad-leaf forest and then to broadleaf forest.But in the latter stage,species diversity of coniferous-broad-leaf forest is quite high,near broadleaf forest。 (2)Species diversity has a relation to...

Based on the tree and undergrowth species diversity measurement of 11 fore- st communities in Guangdong subtropic,this paper deals wilh the distributional regularity and practice importance of forest species diversity. preliminary results are: (1)The species diversity increases from coniferous forest to coniferous- broad-leaf forest and then to broadleaf forest.But in the latter stage,species diversity of coniferous-broad-leaf forest is quite high,near broadleaf forest。 (2)Species diversity has a relation to community structure.It goes up with the ascent of homogeneity and goes down when the dominance of dominants increases. (3)In the range of Guangdong subtropical forest,species diversity becom- es lower when latitude becomes higher. (4)In the developing forest,species diversity becomes higher from the canopy sublayer to the second sublayer to the third sublayer while it chang- es conversely in the degenerative forests.

本文通过对亚热带11个森林群落的立木层及林下层物种多样性指数及均匀度的测定,分析、探讨了森林群落物种多样性的分布规律。

 
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