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canopy structure
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  canopy structure
The results show that small-diameter Korean pines' origination and growth have close relations to the overstory canopy structure dynamics and play an important role in the maintenance and development of Korean pine forest.
      
Canopy structure would influence DTS and DCR across canopy-atmosphere interface remarkably.
      
deltoides, was used to evaluate the genetic basis of canopy structure and function in a clonally replicated plantation.
      
Canopy structure, shoot design, and photosynthetic light recruitment were used to compare four coexisting dwarf shrub species with respect to light utilization.
      
Canopy structure and physiology of paper birch are examined in the field during two growing seasons.
      
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The floristic composition, phytomass and canopy structure of six grassland types in the vicinity of Chongging. Sichuan. China, is described. Phytosociologically two main types arc distinguished. All grassland types are strongly dominated by few species. Also in canopy structure two main types are distinguished, but the structural types do not fully parallel the phytosociological types. The structural types arc determined by the dominant species being either a grass or a fern. Light climates inside...

The floristic composition, phytomass and canopy structure of six grassland types in the vicinity of Chongging. Sichuan. China, is described. Phytosociologically two main types arc distinguished. All grassland types are strongly dominated by few species. Also in canopy structure two main types are distinguished, but the structural types do not fully parallel the phytosociological types. The structural types arc determined by the dominant species being either a grass or a fern. Light climates inside the canopies depend on the structure of the canopies. The Monsi & Saeki model well described the light climate on the grass-dominated canopies, but not that in the fern-dominated canopies.

本文叙述四川重庆附近地区6个亚热带草地类型的植物区系组成、植物量和植冠结构.这6个亚热带草地类型分别属于半自然样地和栽培样地的两个不同植物群落.所有的草地类型是非常明显地由5个优势种组成.这两个植物群落的植冠结构虽然有些区别,但更重要的是这两个群落结构类型却完全不同.这两个结构类型决定于优势种是禾草类或蕨类植物.植冠内部的光气候决定于植冠的结构.蒙斯(Momsi)和塞克(Saeki)模型可以很好地描述禾草类占优势的植冠中的光气候,但不能应用于以蕨类植物占优势的植冠中的光气候.

The influences of five different training systems (U、 V、 H、 T、△ shapes) on can-opy microclimate ( light, temperature and water) and the effects of the canopy microclimate on canopy net photosynthetic and transpiration rate were studied in Beijing area. The results indicated that, by manipulating canopy structures through management of the training systems, a series of canopy microclimate models with remarkable differ-ences were established, showing the full efficiency of training system...

The influences of five different training systems (U、 V、 H、 T、△ shapes) on can-opy microclimate ( light, temperature and water) and the effects of the canopy microclimate on canopy net photosynthetic and transpiration rate were studied in Beijing area. The results indicated that, by manipulating canopy structures through management of the training systems, a series of canopy microclimate models with remarkable differ-ences were established, showing the full efficiency of training system management in regu-lating canopy microclimate and the appreciable potentiality for exploiting the ecological re-sources by improving training systems of vineyards. Positive linear relationships between canopy microclimate and canopy net photosynthetic and transpiration rate were estab-lished.

利用不同栽培方式对叶幕结构的调节,可以创造出差异很大的叶幕光热微气候模式。本实验证明了栽培方式对叶幕微气候调控的充分有效性。并建立了叶幕光能截留与群体光合和蒸腾速率的相关数学模型。

The present study is to investigate influnces on resource availability for “target”Gordonia acuminata seedlings,their growth,morphology、canopy structure and biomass by their different neighbors individuals of Pinus massoniana,Symplocos setchuenensis and Gordonia acuminata seedlings .Attempts,was also made to find out the main factors of the neighbor influence on the growth of the “target” individuals in natural gap of subtropical evergreen broadleaved forest.The results show that the growth and light...

The present study is to investigate influnces on resource availability for “target”Gordonia acuminata seedlings,their growth,morphology、canopy structure and biomass by their different neighbors individuals of Pinus massoniana,Symplocos setchuenensis and Gordonia acuminata seedlings .Attempts,was also made to find out the main factors of the neighbor influence on the growth of the “target” individuals in natural gap of subtropical evergreen broadleaved forest.The results show that the growth and light interception differed significantly among different neighbors:The growth characters of target individuals were poorly correlated with the height、the leaf biomass、total biomass of neighbors and their light interception at 10 cm height above ground in canopy,but were highly correlated with their light interception at 30 cm height above ground.Therefore,the major factor for growth of the target individuals was light availability of the neighbor shading the target individuals.The growth dynamics of target individuals,in terms of tree height,number of leaves,leaf area,leaf size,canopy structure and biomass,were significantly influenced by different neighbors.The height and growth、the leaf area、the canopy width and the biomass of the target individuals were larger in G.acuminata+no neighbor than those in G.acuminata+S.setchuenensis those of which were in turn larger than those in G.acuminata+P.massoniana.In G. acuminata+G.acuminata,those characters were smallest.The intraspecific competition in G.acuminata was greater than the interspecific one.

在亚热带常绿阔叶林自然林窗下,以大头茶幼苗为基株,分别以马尾松、川灰木和大头茶幼苗为邻体。研究不同邻体如何改变可利用资源,影响大头茶幼苗基株生长动态和形态、树冠结构和生物量效应,并探讨影响基株生长的邻体的主导因素。结果表明,不同邻体的生长和截光效应差异明显;基株生长特征与邻体的树高、叶生物量、总生物量和树冠距地表10cm处截光量相关极小,却与邻体树冠距地表30cm处截光量相关极大,故影响基株生长的邻体主导因素是遮挡基株树冠的邻体的可利用光资源;基株生长动态,如树高、叶数、叶面积和叶大小,树冠结构和生物量显著受到不同邻体的影响,并且基株树高及增长量、叶面积、冠幅和生物量均为大头茶单株(GNO)>大头茶+川灰木(GNS)>大头茶+马尾松(GNP)>大头茶+大头茶(GNG)。大头茶幼苗种内竞争明显强于种间竞争。

 
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