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canopy gap
相关语句
  林窗
    Temporal-spatial distribution characteristics of microclimate in tropical secondary forest canopy gap in Xishuangbanna
    西双版纳热带次生林林窗小气候要素的时空分布特征
短句来源
    A Study on the Sun shine Spatial and Temporal Characteristics in the Tropical Secondary Forest Canopy gap in the Different Season in Xishuangbanna
    西双版纳不同季节热带次生林林窗光照时空分布特征
短句来源
    Principle Analysis on Characteristics of the Spatial Variation of Average Air Temperature in Tropical Secondary Forest Canopy Gap.
    热带次生林林窗平均气温空间分布特征的初步分析
短句来源
    Characteristic analysis on different thermal active surfaces in canopy gap of tropical secondary forest.
    热带次生林林窗不同热力作用面特征分析
短句来源
    A PRIMARILY STUDY ON RADIATION CHARACTERISTICS OF CANOPY GAP IN A TROPICAL SECONDARY FOREST IN XISHUANGBANNA,SW CHINA
    西双版纳热带次生林林窗辐射特征初步研究
短句来源
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  林隙
    The size of expandedgap (EG) and that of canopy gap (CG) centralize at 100~300 m2 and <150 m2, respectively;
    扩展林隙在100~300m~2之间分布最多,冠空隙在150m~2以下分布最多;
短句来源
    The results showed that the area percentage of expanded gap (EG) and canopy gap (CG) in the forest landscape were 50.86% and 16.66% respectively. The natural disturbance frequency for EG and CG were 0.85%·a-1 and 0.28%·a-1 respectively, the return interval of canopy gaps was about 357a.
    结果表明,在中亚热带常绿阔叶林中,扩展林隙(EG)和冠空隙(CG)在中亚热带常绿阔叶林景观中的面积比例分别为50.86%和16.66%,干扰频率分别为0.85%·a~(-1)和0.28%·a~(-1),林隙干扰的返回间隔期约为357a。
短句来源
    The ratio of the CG diameter vs. gap height of canopy gap and the ratio of the EG diameter vs. gap height centralized at about 0.30-0.45 and 0.60-0.80, respectively.
    林隙的腐烂等级C级的分布较多; 冠空隙径高比多分布在0.30-0.45之间,扩展林隙径高比多分布在0.60-0.80之间;
短句来源
    The ecological effects of canopy gap on tree species have received much attention in the study of modern forest ecology.
    林隙生态机理已成为现代森林生态学研究的热点,尤其是林隙内光照条件的变化对树种更新和生长具有重要的生态效应。
短句来源
    The results showed that the area percentage of expanded gap (EG) and canopy gap (CG) in the forest landscape was 50.86% and 16.66%,and the natural disturbance frequency for EG and CG was 0.85%·yr -1 and 0.28%·yr -1,respectively. The return interval of canopy gaps was about 357 years.
    结果表明 ,在中亚热带常绿阔叶林中 ,扩展林隙 (EG)和冠空隙 (CG)在中亚热带常绿阔叶林景观中的面积比例分别为 5 0 86 %和 16 6 6 % ,每年干扰频率分别为 0 85 %·年 -1和 0 2 8%·年-1,林隙干扰的返回间隔期约为 35 7年 .
短句来源
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  林冠空隙
    the size of canopy gap (CG) varied from 11.37 to 183.39 m 2, and a large proportion of canopy gaps were in the size of less than 80 m 2;
    实际林冠空隙 (CG)的面积大多在 1 1 .37~ 1 83.39m2 之间 ,其中以小于 80m2 所占比例较大 ;
短句来源
    According to our field survey data, areas of canopy gaps and expanded gaps in broadleaved Korean pine forests in Changbai Mountains accounted for 12.5% and 28.8% of total survey areas, among which gaps with canopy gap area of 20-100 m2 and expanded gap area of 80-240 m2 made up of 80.7% and 81.8% of the totals respectively.
    林冠空隙总面积占调查样地总面积的12.5%,扩展林隙总面积占调查样地总面积的28.8%; 冠空隙面积在20~100m2之间的林隙占林隙总数的80.7%,扩展林隙面积在80~240m2之间的林隙占林隙总数的81.8%.
短句来源
    CHARACTERISTICS AND CAUSES OF CANOPY GAP OF DARK CONIFEROUS FOREST IN CHANGBAI MOUNTAIN
    长白山暗针叶林林冠空隙特征及其形成原因
短句来源
  “canopy gap”译为未确定词的双语例句
    Characteristics of Tridimensional Distribution of Microclimate in Tropical Seasonal Rain Forest Canopy Gap
    热带季节雨林林窗小气候要素时空分布特征
短句来源
    Radiation characteristics in a tropical seasonal rain forest canopy gap
    热带季节雨林林窗辐射特征研究
短句来源
    Spatial temperal Characteristics of Boles Surface Temperature at the Edge of Canopy Gap in Tropical Secondary Forest
    热带次生林林窗边缘树干表面温度时空分布特征
短句来源
    Primary analysis on characteristics of air temperature in dry hot season to canopy gap on
    西双版纳热带次生林林窗干热季气温分布特征的初步分析
短句来源
    Temporal spatial characteristics of trunk surface temperature at the edge of canopy gap in tropical secondary forest of Xishuangbanna in dry season.
    西双版纳热带次生林林窗边缘树表温度的时空分布
短句来源
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  canopy gap
Seeds under unfiltered light, which simulated the light conditions of seeds on the soil surface in a canopy gap, germinated at a constant temperature of 20°C.
      
Contrasted Responses of Two Understorey Species to Direct and Indirect Effects of a Canopy Gap
      
There were many indicator species for high understorey light levels and canopy gap centres, but none for medium or low light or closed canopy.
      
Four attributes were included in the PCA: final germination percentage in canopy gap, germination rate in the laboratory, and gap-and chilling-dependency indices (EGAP and STRAT, respectively).
      
Final percent germination was significantly enhanced under canopy gap conditions in 19 species, and significantly reduced in 11 species.
      
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The spatial distribution of throughfall in Pinus tabulaeformis plantations in northern China demonstrated that: the amount of through-fall under a single tree increases as the distance from the increases. The maximum amount of throughfall is not always at the canopy gaps, this is because of the translocation effect of the canopy to precipitation. The amount of throughfall at a given point is positively proportional to the area that actually receives rain. Throughfall varies greatly in space, and...

The spatial distribution of throughfall in Pinus tabulaeformis plantations in northern China demonstrated that: the amount of through-fall under a single tree increases as the distance from the increases. The maximum amount of throughfall is not always at the canopy gaps, this is because of the translocation effect of the canopy to precipitation. The amount of throughfall at a given point is positively proportional to the area that actually receives rain. Throughfall varies greatly in space, and the range is from 63.8% to 125.3% of the precipitation. Spectral analysis methods were used for the analysis of the throughfall distribution series, and the results are. the spatial distribution pattern of throughfall is mainly determined by the spatial distribution pattern of the canopy structure, periodicity has been found in the series, and it is cau- used by the periodicity of the canopy structure, but it has no evident relation to the periodicity of the trees spatial pattern.

华北油松人工林林下降雨(throughfall)的空间分布表明:单株树下的林下降雨量随着离树干距离的增加而增加;林下降雨的最大点并非总是在林冠的空隙处,这是因为林冠对降雨有空间位移作用;某点的林下降雨大小与该点的实际受雨面积成正比;林下降雨存在很大的空间变异,变动范围为降雨量的63.8~125.3%。对林下降雨分布的实测数据进行谱分析后得出结论:林下降雨的空间分布形式主要由林冠结构的空间分布形式决定,随着降雨量的增加,这一点表现得越来越明显;林下降雨的空间分布具有周期性,这种周期性是由林冠结构特征的周期性决定的,它与林木空间格局的周期性之间无明显关系存在。

The ecological effects of canopy gap on tree species have received much attention in the study of modern forest ecology.However,because of difficulties in measuring light attenuation in canopy gap and complex structure of forest canopies.Therefore,fish-eye photography was used to determine the hemispherical canopy photographs, and a mathematical model was used to calcutate the shading effects of tree canopy around gap Through comparing the track of sun that was draw on the...

The ecological effects of canopy gap on tree species have received much attention in the study of modern forest ecology.However,because of difficulties in measuring light attenuation in canopy gap and complex structure of forest canopies.Therefore,fish-eye photography was used to determine the hemispherical canopy photographs, and a mathematical model was used to calcutate the shading effects of tree canopy around gap Through comparing the track of sun that was draw on the hemispherical canopy photograph.the light regimes in gap was determined.

林隙生态机理已成为现代森林生态学研究的热点,尤其是林隙内光照条件的变化对树种更新和生长具有重要的生态效应。但是、由于林隙结构极为复杂,难以精确地测量林隙上方和周围树冠空隙的透光情况。为此,本文应用鱼眼全景摄影方法拍摄了林隙结构的全景图象,建立了在像片上直接计算林隙遮蔽效应的数学模型,并在林隙全景像片上绘制出太阳视轨道,就可以定量和直观地表述林隙内日照条件的变化规律。

The disturbance regime of small and middle scale gap in two stands of a subalpine old growth Picea Abies (spruce fir) forest around Bitahai Lake, north west corner of Yunnan Province, were examined. Canopy gaps and expanded gaps covered 19% and 41% of total land area. The mean area of gaps and expanded gaps were 44 m 2 and 139 m 2 respectively. The gaps were formed with a frequency of 0.005 to 0.007 per year, and the estimated mean gap return interval was 167 years....

The disturbance regime of small and middle scale gap in two stands of a subalpine old growth Picea Abies (spruce fir) forest around Bitahai Lake, north west corner of Yunnan Province, were examined. Canopy gaps and expanded gaps covered 19% and 41% of total land area. The mean area of gaps and expanded gaps were 44 m 2 and 139 m 2 respectively. The gaps were formed with a frequency of 0.005 to 0.007 per year, and the estimated mean gap return interval was 167 years. Most gaps (87%) had more than one gap maker (overall means: 2.9 gap makers per gap), and gap makers within a gap were often from mortality events in separated time. In all gap makers investigated snap were 60%, but uproot and died standing were 28% and 12% respectively.

研究了云南碧塔海两块亚高山云冷杉(Picea-Abies)林内中小尺度林窗的干扰体系,结果表明:林窗和扩展林窗分别占林地面积的19%和41%,平均面积为44m2和139m2,林窗的形成频率为0.005~0.007/y。估计平均林窗周期为167年。大多数林窗(占87%)的制造林窗树木(gap-maker,简记为GM)为1个以上,平均每个林窗的GM为2.9个,同一林窗内的GM常常死于不同的时间。在所有调查的GM中,折断占60%,而根拔和直立死亡分别为28%和12%

 
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