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   乡土种 的翻译结果: 查询用时:0.058秒
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乡土种     
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  native species
     Index signs of ecology evaluation include: coverage, bio-diversity index, the resemblance coefficient between native species, resistance and aesthetic value.
     护坡植被生态评价指标有:盖度、物种多样性指数、乡土种与自然边坡相似系数、抗逆性、景观喜好度,并分别按照不同指标权重,计算出护坡植被的景观评价值。
短句来源
     Based on the concept of alien species, native species, alien species invasion and its harm, the positive and negative influence of alien species and population amplification on diversity of species are expatiated systematically.
     在综述外来种、乡土种和外来种入侵的基本概念及其危害情况的基础上,系统阐述了外来种侵入和种群扩大对生物多样性所带来的正负两方面的影响。
短句来源
     The introduction and testing of exotic species should be done only under rigorous scientific test-ing and after comparison with native species prior to operational introduction into forestry in order to avoid unwanted ecological conse-quences, including potential problems with alien invasives and pest introductions.
     外来种的引进和试验应该仅限于严密的科学试验,同时在林业引进外来种之前应该事先与乡土种进行对比,包括潜在的外来侵入种和害虫的问题,以防产生有害的生态后果。
短句来源
     The authors also emphasize the need to maintain viable (e.g., genetically diverse and reproductively fit) natural populations of native species in order to protect China’s valuable natural diversity and maintain the potential of native species to function as future seed sources for local forest and ecological restoration activities.
     作者还强调了保持可育的(例如:基因多样性和繁殖适合度)乡土种自然种群的重要性,因为只有这样才能保护中国珍惜的自然多样性,保持乡土种作为当地森林和生态建设的种源的潜力。 参 4。
短句来源
  “乡土种”译为未确定词的双语例句
     Among them, 451 species were Beijing native plants, which were accounted for 71.36% of total plants species; 99 species were introduced from other regions of China, 15.66% of total parks plants, and 73 species were introduced from foreign countries, 11.55% of total plants.
     其中北京本地种451种,占总数的71.36%,国内引进种99种,占总数的15.66%,国外引进种73种,占总数的11.55%,表现出北京城市建成区植物以乡土种为主体,引进种也较为丰富的特征。
短句来源
     Comparison of growth adaptability of native Bothriochloa ischaemum and introduced Panicum virgatum was conducted in hilly region of Loess Plateau.
     在黄土丘陵区的梯田和坡地两种不同立地上对乡土种白羊草和引进种柳枝稷的生长适应性进行了比较,结果表明:两种牧草在植被土壤水分、地上部和地下部生长均存在明显差异。
短句来源
  相似匹配句对
     GROWTH COMPARISON OF INDIGENOUS BROAD LEAVED TREE SPECIES
     乡土阔叶树生长比较
短句来源
     Present Situation and Development of Indigenous Broadleaf Species in Yunnan Hot Areas
     云南热区乡土阔叶树的现状及发展
短句来源
     THE NATIVE SOIL AND VILLAGERS
     乡土乡民
短句来源
     nov. New species: Anothopoda zanthoxyli sp .
     新
短句来源
     Growing Good Corn
     玉米
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  indigenous species
This system was used to analyze three major non-indigenous species, Dendroctonus valens, Hyphantria cunea, and Apriona swainsoni.
      
Alien plants, along with their ecological invasion and negative impacts on indigenous species diversity and ecosystems, are one of the major topics of current ecological research.
      
Among the seven indigenous species, six are Holarctic; the distribution of five species is confined to tundra landscapes, and five species are predators.
      
In nature, the non-indigenous species might even reach higher levels of dominance over A.
      
Non-indigenous species were screened in glasshouse tests in the UK.
      
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  native species
They are generalist predators and thus may affect native species through predation.
      
While some facilities maintain both exotic and native species, most (68%) house native species only.
      
The arid climate of the islands may hinder the establishment of invasive species, which are often not able to survive in the bush and thus reduces their impact on native species.
      
The first group comprises 35 native species, of which seven are currently extinct or vanished.
      
rusticus compared to native species, resulting in increased probability of shifts in crayfish community composition.
      
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  autochthon
Alternative tools based on normaltive databases derived from different autochthon populations add evidence needed to support their global use.
      
The use of linear regression functions of HRT parameters elaborated from autochthon population around the world will and the amounts of evidence needed to support the global use of these functions.
      
This was the response in the footwall of the suture to the major phase of Hercynian oblique collision between the South Portuguese Plate and the Ossa-Morena Zone of the Iberian Autochthon.
      
The base rock at the Akk?prü dam site and reservoir area is autochthon Akta? limestone and G?kseki flysch formation.
      
Die Entzündungen k?nnen autochthon (lymphozyt?re Hypophysitis, idiopathische granulomat?se Hypophysitis, xanthomat?se und peritumor?se Hypophysitis), oder Teil eines generalisierten Prozesses (Sarkoidose u.
      
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  local species
A revision of the local species of sipunculans is performed for the first time.
      
The isoenzymes and soluble protein of the local species are all polymorphic.
      
One of the plausible mechanisms that maintain species distinctiveness, or limit hybridization, is the existence of local species-specific preferences for the natal habitat type.
      
These differences are caused by the correlation of spawning periods of local species of different zoogeographical origin with the different water temperatures.
      
Local species composition was similar to that in Chesapeake Bay, and dominant species occurred in estuaries throughout the Mid-Atlantic Bight.
      
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Identification of superior provenances of Chinese fir (Cunninghamia Lanceolata (Lamb) Hook) and verification of their genetic superiority are most important in the work of genetic improvement of this species. Our study on this subject started in 1974, and was completed in 1979.

杉木优良产地的鉴定及其遗传优势的检验,是杉木树种遗传改良的重要组成部分。这项试验于1974年开始,在1979年结束。 遗传优势研究的初步结果证实,十一个产地四年生的表型差异,在1%(或5%)的平准上存在显著性。 在产地平准上,产地之间的变异通常有些合适的类型,产地与地点的适应性的生态群,有可能形成产地变迁模式的基础。根据这些试验的结果,在杉木自然分布区域之内,可区划成三个育种区:“中心”、“一般”和“边缘”。 从方差分析的结果看出,在中心区的亚群体比之在边缘区的亚群体,在遗传上具有更大的稳定性。杉木产地变迁模式的发展,对于当地(乡土)种是完全适合的。因此,用当地种的“优树”(加号树)建立种子园是适宜的。

Leaves with systemic symptoms of ring or irregular spots or leaf scorch and deformation (PV-1) and rolling leaves with chlorosis deformation (PV-2),were collected from Beijing,Hunan and Henan province. The poplar viral sap can infect Nicotiana tobacum, N. glutinosa and other herbaceous plants. The observation on the morphology of the particles, serological reaction and symptom expressions of various hosts, (PV-1) and (PV-2) were considered to be CMV and TMV. The results of artificial inoculation of the two viruses...

Leaves with systemic symptoms of ring or irregular spots or leaf scorch and deformation (PV-1) and rolling leaves with chlorosis deformation (PV-2),were collected from Beijing,Hunan and Henan province. The poplar viral sap can infect Nicotiana tobacum, N. glutinosa and other herbaceous plants. The observation on the morphology of the particles, serological reaction and symptom expressions of various hosts, (PV-1) and (PV-2) were considered to be CMV and TMV. The results of artificial inoculation of the two viruses to the poplar leaves showed that 12 clones of poplar were resistant; 6 clones were susceptible and 2 clones were moderately susceptible.

从河南、湖南和北京采集到的具明显系统性紫红色坏死变形[PV-1]和叶褪绿皱缩[PV-2]杨树病株,经病害症状观察、病毒提纯和电镜观察、病毒回接、生化性状等试验,证明两种分离物是球状病毒粒子和杆状病毒粒子,是杨树上发生的两种病毒的病原。用杨树毒汁接种能感染多种草本植物。从病毒粒子的形状大小、理化性质、生物测定和血清反应,认为[PV-1]和[PV-2]分别属CMV和TMV。抗病品种鉴定看出,国内乡土种和北方型的品种抗病力较强,南方型的美洲黑杨和欧美杨易感病。

Huangjia Lake and Qingling Lake are two small-sized lakes,located on the south bank of Changjiang (Yangtze)River.The two lakes are about two kilometres apart and 13 kilometres from Wuhan City. The area of Huangjia Lake is 6.9 km2and 1.2m on average in depth in August. Qingling Lake is 9. 7 km2 in area and 1.7 m in depth.Huangjia Lake has a long history of fishculture. With the development of fishery exploitation,the environment of the lake is destroyed seriously and most of the aquatic plants disappeared.Qingling...

Huangjia Lake and Qingling Lake are two small-sized lakes,located on the south bank of Changjiang (Yangtze)River.The two lakes are about two kilometres apart and 13 kilometres from Wuhan City. The area of Huangjia Lake is 6.9 km2and 1.2m on average in depth in August. Qingling Lake is 9. 7 km2 in area and 1.7 m in depth.Huangjia Lake has a long history of fishculture. With the development of fishery exploitation,the environment of the lake is destroyed seriously and most of the aquatic plants disappeared.Qingling Lake is separated into two parts and one is used for breeding fish and the other is not interfered.Within the part of Qingling Lake under normal conditions,the majority of plants distributed in the outside of the palisade which is about three fifth of the total are a of the lake.Moreover, only 10 species existed within the palisade because fishculture is intensified in recent years. The plants living outside the palisade are more than those of inside,especially the species of the genus Trapa which are rare in the Huangjia Lake. In addition, Ottelia alismoides,also distributed outside the Qingling Lake and scatterad from the Yun-Gui plateau to Sanjiang Plain, but it has become a rare species in the lakes of the Changjiang River basin.This paper tries to find out the factors affecting the growth and distribution of aquatic plants.The relationship between the species richness and the structure of community,and the reasons for the aquatic plants disappearance from the lakes.In order to reach these purposes,some corresponding researches have been carried out in the Huangjia Lake and Qingling Lake.The results obtained from the experiments show clearly that the fishery exploitation is the main limiting factor which affect the life of the plants.The species richness is closely related to the structure of the communities.

讨论了渔业利用对武汉市两个近郊湖泊的不同影响,养鱼历时10a的黄家湖中水生植物种类数量锐减,鱼喜食的一些植物种类已灭绝。青菱湖渔业利用强度低,仅在东半部进行2a鱼类粗养试验,故水生植物生长受到较少影响,1994年停放鱼苗后,东半部水生植被得以恢复,许多乡土种重新在湖区中出现。对青菱湖与黄家湖水生植物区系组成、群落结构、物种丰富度与均匀度、群落分类与生物量及植被分布等进行了对比分析。青菱湖现有水生植物52种,包括一些稀有种和对环境变化敏感的易危种;群落结构较复杂,数量特征值和生产量较高。相反,黄家湖仅有29种植物,且多为广布种;群落结构简单,数量特征值和生产量较低。从植物丰富度比较青菱湖的值明显偏高。造成两湖水生植物多样性变化较大的主要原因是人为干扰。

 
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