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structure of canopy
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  叶幕结构
     Effects of Different Structure of Canopy on the Growth of Cabernet Sauvignon
     不同叶幕结构对赤霞珠葡萄生长发育的影响
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  “structure of canopy”译为未确定词的双语例句
     2. The structure of canopy was reasonable, the distribution shape ofaboveground and below ground biomass liked pyramid.
     2.草层结构合理,地上生物量与地下生物量呈金字塔型分布。
短句来源
     Size structure of canopy gaps in broadleaved Korean pine forests in the Changbai Mountains
     长白山阔叶红松林林隙大小结构研究
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     Compared with rubber plantation,tropical seasonal rainforest had a stronger rainfall-storage capacity due to its multi-layer structure of canopy and excellent water-holding performance.
     与橡胶林相比,热带季节雨林林冠持水能力虽较小,但是其多层林冠结构林冠持水能力较强.
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     In this paper, authors summarized the application of Monte Carlo method on the simulation of BRDF and hot spot effect in the vegetation canopy, and gave comments in detail on the parameters: LAI, LAD, G function, gap probability, free length of photon, and leaf phase function. They describe the geometrical structure of canopy.
     本文总结了用蒙特卡罗方法模拟研究植被冠层 BRDF和热点效应的过程 ,并详细地综述了蒙特卡罗模拟研究中需要涉及的描述植被结构的参量 :LAI、LAD、G函数、孔隙率、自由路径和相位函数。
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     In this article, some new technologies about integral tension in the construction of large cable and membrane structure, with the computer\|controlled hydraulic\|power shifting cylinder, are introduced with the example of the construction of the membrane structure of canopy of Qingdao Yizhong Stadium.
     针对青岛颐中体育场蓬盖膜结构工程的施工 ,探讨计算机控制液压千斤顶群整体张拉技术在大型索膜结构施工中的应用与创新
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     The structure of P.C.
     大跨度预应力混凝土斜拉桥(简称P.C.斜拉桥)结构不仅经济、美观,而且可以采用悬臂浇筑方法施工、使这一桥型得以迅速推广。
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     " ,the structure
     兼及了“V他+……”结构的特征。
     The structure of C.
     剖析C.
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     On ITS Structure
     论ITS的结构体系
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     STUDY ON THE STRUCTURE AND PHOTOSYNTHESIS OF COTTON CANOPY
     棉花冠层结构及光合作用研究
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  structure of canopy
The aim of this paper is to present a first typology of oak and Scots pine mixed stands, based on the spatial structure of canopy trees.
      


In order to research the relationship of double layer's source-sink for both the photosynthetic production and the mineral nutrient, two types of soil environmental treatments, narrow bed with dense ditchs and level paddy field, and three level's nitrogen application, 0 kg N/ha, 150 kg N/ha, 225 kg N/ha, were designed. The development and distribution of rice root system play a role in forming a connecting link between photosynthetic source-sink and mineral nutrient source-sink. The improvement of soil water...

In order to research the relationship of double layer's source-sink for both the photosynthetic production and the mineral nutrient, two types of soil environmental treatments, narrow bed with dense ditchs and level paddy field, and three level's nitrogen application, 0 kg N/ha, 150 kg N/ha, 225 kg N/ha, were designed. The development and distribution of rice root system play a role in forming a connecting link between photosynthetic source-sink and mineral nutrient source-sink. The improvement of soil water environment may promote the development and extending downward of rootsystem, mineralization of soil N, and N absorption of plant simultaneously.The efficiency of absorption of applied N increases with the N absorbing ability of the plant, it is necessary to increase the utilization efficiency of absorbed N for further increasing the yield efficiency of applied N. It is important to improve the population structure of canopy in order to obtain a harmonious development of double layer's sourcesink.

为研究光合生产与矿质营养的双层源库关系,设计了窄密沟与平作两种土壤环境,无N、150kgN/hm2、225kgN/hm2三个N肥水平的处理,研究了光合生产、矿质营养和两者的双层源库关系。结果表明:根系发育与分布在双层源库间起着承上启下的作用。土壤水分环境改善可同步促进根系发育和下伸、土壤N矿化和植株N吸收。植株吸收N能力的增强,使施N吸收效率提高;但要提高施用N的产量效率,还需提高吸收N的利用效率。为此,改善地上部群体配置,对光合生产与矿质营养的双层源库关系协调发展有重要意义。

Through the preliminary measurement of leaf layer structures of Quercus mongolica,Acer mono,Fraxinus mandshurica and Phellforendron amurens saplings,canopies in natural secondary forest communi-ty,the frequency distribution laws of four saplings’leaves.according to azimuth and tilt angle in different spa-tial layers. and the changing characteristics of their leaf area density UL(Z)were revealed. The significance ofresearching leaf layer structure of canopy was discussed deeply.

对天然次生林群落中的四种阔叶幼树─—蒙古栎、色木械、水曲柳、黄波罗的树冠叶层结构进行了初步测定,揭示了在不同的空间层次内按方位角与倾斜角的频度分布规律以及叶面积密度U_L(Z)的变化特点,并对研究树冠叶层的结构的意义作了深入讨论。

Using gird system and layer methods, the characteristics of canopy structure and the patterns of light distribution in the 8 year old trees in four different high densities(4 m×3 m,3 m×2 5 m,3 m×2 m,3 m×1 5 m) orchards of chestnut( Castanea mollissima ) were studied in Xin Yi county, Jiangsu province. The results showed that the diameter of canopy reduced, the layer of green leave raised,the thickness of canopy decreased and the volume of canopy reduced with the density increased; The light distribution...

Using gird system and layer methods, the characteristics of canopy structure and the patterns of light distribution in the 8 year old trees in four different high densities(4 m×3 m,3 m×2 5 m,3 m×2 m,3 m×1 5 m) orchards of chestnut( Castanea mollissima ) were studied in Xin Yi county, Jiangsu province. The results showed that the diameter of canopy reduced, the layer of green leave raised,the thickness of canopy decreased and the volume of canopy reduced with the density increased; The light distribution in the different layers of the canopy varied with the changes of the natural sunlight. The mean daily light transmissivity and the daily changes of the light intensity were reduced from the external to the internal part of the canopy. The light distribution in the canopy and the efficience of its utilization were obviously affected by the structure of canopy and the leaf area index(LAI). The best density that has high efficience light usage should be maintained with 834~1334 trees.gha -1 , with the thickness of canopy more than 2.0 m and an effective leaf area index of appoximately 5~6.

采用方格法和分层法对江苏省新沂市沐河果园4种不同密度(4m×3m、3m×2.5m、3m×2m、2m×1.5m)8年生板栗密植园的树冠结构特征和光能分布规律进行了研究。结果表明:随着密度的增大,树冠直径减小,绿叶层上移,叶幕厚度变薄,树冠体积减少;各层叶幕中的光能分布随着自然光照的变化而改变,其日平均透光率大小和光合有效辐射(PAR)日变化范围均从叶幕外围向内膛而递减,树冠结构和叶面积指数(LAI)对PAR分布及利用效率具有决定性的影响。成龄板栗密植园高效光合生产的叶幕厚度宜在2.0m以上,有效叶面积指数5~6,适宜密度为834~1334株/hm2。

 
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