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林木     
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  forest
    COATING OF FOREST TREE SEEDS AND ANALYSIS OF MOTION CHARACTERISTIC
    林木种子裹衣及其运动特性分析
短句来源
    ISOZYMES AND STUDIES ON POPULATION GENETIC VARIATION IN FOREST TREES
    同工酶与林木群体遗传变异研究
短句来源
    PROGRESS IN RESEARCH OF FOREST PROTOPLASTS CULTURE
    林木原生质体培养研究进展
短句来源
    Construction of Genetic Linkage Map in Forest Tree Using Dominant Molecular Markers and F_1 Pedigree
    利用显性分子标记和F_1群体进行林木遗传连锁图谱的构建
短句来源
    The history and situation of studies on induced polyploidy in forest trees
    林木多倍体诱导研究的历史与现状
短句来源
更多       
  tree
    COATING OF FOREST TREE SEEDS AND ANALYSIS OF MOTION CHARACTERISTIC
    林木种子裹衣及其运动特性分析
短句来源
    Construction of Genetic Linkage Map in Forest Tree Using Dominant Molecular Markers and F_1 Pedigree
    利用显性分子标记和F_1群体进行林木遗传连锁图谱的构建
短句来源
    Situation and Problems in Genetic Engineering of Tree for Resistance to Pests and Diseases
    林木抗病虫基因工程的现状和问题
短句来源
    The principal of molecular systematics and the application in forest tree
    分子系统学原理及其在林木上的应用
短句来源
    RAPD and it's application in forest tree genetic research
    RAPD技术及其在林木遗传研究中的应用
短句来源
更多       
  forest tree
    COATING OF FOREST TREE SEEDS AND ANALYSIS OF MOTION CHARACTERISTIC
    林木种子裹衣及其运动特性分析
短句来源
    Construction of Genetic Linkage Map in Forest Tree Using Dominant Molecular Markers and F_1 Pedigree
    利用显性分子标记和F_1群体进行林木遗传连锁图谱的构建
短句来源
    The principal of molecular systematics and the application in forest tree
    分子系统学原理及其在林木上的应用
短句来源
    RAPD and it's application in forest tree genetic research
    RAPD技术及其在林木遗传研究中的应用
短句来源
    Research Progress in Forest Tree Genetic Linkage Map Construction and Its Future Prospects
    林木遗传连锁图谱构建研究进展与发展方向
短句来源
更多       
  forest trees
    ISOZYMES AND STUDIES ON POPULATION GENETIC VARIATION IN FOREST TREES
    同工酶与林木群体遗传变异研究
短句来源
    The history and situation of studies on induced polyploidy in forest trees
    林木多倍体诱导研究的历史与现状
短句来源
    Statistical Methods for Constructing Genetic Linkage Maps and Mapping QTLs in Forest Trees
    林木遗传图谱构建和QTL定位的统计方法
短句来源
    Studies on the Microelements in Forest Trees and Their Litters
    几种林木植物体及枯落物的微量元素分析
短句来源
    Progress of osmoregulation mechanism and genetic engineering under drought stress in forest trees
    林木抗旱的渗透调节及其基因工程研究进展
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  forest
Moreover, a backward reasoning forest of a reachable marking was generated for explicitly representing reachable paths in RBS.
      
Growth Model System for National Continuous Forest Inventory
      
A Growth Model System is developed for data updating and forecasting of the national continuous forest inventory.
      
Its design is based on the inherent forest growth laws, and its parameters are estimated by modern regression methods.
      
It is suitable for forest resource information updating and forecasting for a large region, e.g., a province.
      
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  tree
This is done by proving that a well-known method, the construction of a Perron Tree, can be applied to a larger collection of subsets of the unit circle than was earlier known.
      
If a collection of subsets are chosen at random from the power set of a finite setX, we give the probability that the collection is a tree of subsets ofX.
      
Given a complete graph with vertex setX and subsetsX1,X2,…,Xn, the problem of finding a subgraphG with minimum number of edges such that for everyi=1,2,…,n, G contains a spanning tree onXi, arises in the design of vacuum systems.
      
The paper proves that if G is a k-tree, then the bandwidth B of the complement of G is given by
      
In this paper the choosability of outerplanar graphs, 1-tree and strong 1-outerplanar graphs have been described completely.
      
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  forest tree
This paper presents a brief review of traditional methods of studying genetic variation in forest tree species and introduces a new, integrated population genomics approach.
      
Therefore, only the heterotrophic part of tree biomass determines annual carbon losses in a forest tree population.
      
According to genetic variation parameters, three out of six populations (Akdagmadeni-Yozgat, Refahiye-Erzincan and Vezirkopru-Samsun) appear to be preferable populations for genetic conservation and forest tree breeding programs.
      
Plant parasitic nematodes from a forest tree nursery in southern Spain with some notes about the influence of soil storage on th
      
___TAGSTART___BR___TAGEND___A nematological survey was carried out in a forest tree nursery in Andujar, southern Spain.
      
更多          
  forest trees
The results showed that the forest trees grew in a clumped pattern in the stage dominated by the pioneer trees, and that the trees were distributed in a random pattern in the stage dominated by the companion trees or in the mature stage.
      
From population genetics to population genomics of forest trees: Integrated population genomics approach
      
Reducers in the Plant Debris of Wild Fruit and Forest Trees and Shrubs on Sandy Lands in the Semidesert Zone of Stavropol Krai
      
Since the shola forest trees are characterized by their short stature with low to medium girth, about 89% of the total number of deadwood is of the size ranging from 10.1 cm to 40.0 cm in diameter.
      
Some progresses of transferring and expressing Bt toxin gene in forest trees are offered with a discussion on the limits and future prospects of using Bt products in forestry.
      
更多          
  其他


The present paper gives the results of preliminary study of two species of litchi stemborers Arbela dea Swinhoe and Arbela baibarana Mats. These insects are pests of litchitrees and many other subtropical plants, and are common in Fukien, Kwangtung,Yunnan and Hainan Island. The larvae at first infect the barks and then bore into the stems, concealling them-selves in the self-made tunnels. There is one generation a year in Fukien and the pests overwinter in the larvel stage.The adult insects appear from April...

The present paper gives the results of preliminary study of two species of litchi stemborers Arbela dea Swinhoe and Arbela baibarana Mats. These insects are pests of litchitrees and many other subtropical plants, and are common in Fukien, Kwangtung,Yunnan and Hainan Island. The larvae at first infect the barks and then bore into the stems, concealling them-selves in the self-made tunnels. There is one generation a year in Fukien and the pests overwinter in the larvel stage.The adult insects appear from April to July. They deposit their eggs on the barks ofthe stems. Control measures with BHC and DDT give promising results.

本文记载两种钻蛀荔枝树茎的害虫,荔枝拟木蠹蛾及相思拟木蠹蛾。它们是福建、广东、广西及云南等地的荔枝和其他热带、亚热带果树及林木的常见害虫,而我国大陆过去尚未有记载。已查悉寄主植物有无患子科的荔枝、龙眼,芸香科的柑桔类等24科42种类。 这些害虫的幼虫钻蛀树茎成坑道后,匿居其中,夜出食害树茎韧皮部,并以虫粪、木屑等在树皮上缀成隧道,以循避敌害;它们一年皆发生一代,只幼虫在坑道中越冬,4-5月间相继化蛹,4月下旬至7月上旬有成虫出现。卵块生于树皮上。幼虫多于树茎分叉处蛀害。 以666及DDT粉剂或油剂滴注坑道,以及以该药剂较高浓度的水悬液,于7-8月间喷布树茎虫害处,皆有甚好的防治效果。 华南各地荔枝产区,蠹害荔枝树茎的害虫,主要有隶属于鳞翅目,拟木蠹科(Metarbelidae)的荔枝拟木蠹蛾(Arbela dea Swinhoe)及相思拟木蠹蛾(Arbela baibarana Mats.)等两种。这些害虫发生普遍,被害的植株往往导致风折或严重削弱树势,尤以幼树受害更显著,需要加以防治。 鉴于这些害虫除致害荔枝外,尚加害其他多种热带、亚热带果树及林木,而我国大陆过去缺乏记载,为此,笔者...

本文记载两种钻蛀荔枝树茎的害虫,荔枝拟木蠹蛾及相思拟木蠹蛾。它们是福建、广东、广西及云南等地的荔枝和其他热带、亚热带果树及林木的常见害虫,而我国大陆过去尚未有记载。已查悉寄主植物有无患子科的荔枝、龙眼,芸香科的柑桔类等24科42种类。 这些害虫的幼虫钻蛀树茎成坑道后,匿居其中,夜出食害树茎韧皮部,并以虫粪、木屑等在树皮上缀成隧道,以循避敌害;它们一年皆发生一代,只幼虫在坑道中越冬,4-5月间相继化蛹,4月下旬至7月上旬有成虫出现。卵块生于树皮上。幼虫多于树茎分叉处蛀害。 以666及DDT粉剂或油剂滴注坑道,以及以该药剂较高浓度的水悬液,于7-8月间喷布树茎虫害处,皆有甚好的防治效果。 华南各地荔枝产区,蠹害荔枝树茎的害虫,主要有隶属于鳞翅目,拟木蠹科(Metarbelidae)的荔枝拟木蠹蛾(Arbela dea Swinhoe)及相思拟木蠹蛾(Arbela baibarana Mats.)等两种。这些害虫发生普遍,被害的植株往往导致风折或严重削弱树势,尤以幼树受害更显著,需要加以防治。 鉴于这些害虫除致害荔枝外,尚加害其他多种热带、亚热带果树及林木,而我国大陆过去缺乏记载,为此,笔者将近十年(1952-1962)来累积的一些资料整理报导,冀供昆虫工作者参考。

~~

本文主要讨论为农业服务的综合自然区划的原则、区划系统分指标和描述内容及进行区划的方法,着得论述农业生产活动存认识地域分异中的作用及其影响;选定区域划分指标必须注意农作物生态条件和林木的立地条件。进行区划的方法必须把县级区划和省级区划上下结合进行。

The broad-leaf evergreen forest is the most important primary vegeta- tion type of subtropical region in China.Chekiang province is one of the main provinces in which this type distributes.On the basis of investiga- tions of broad-leaf evergreen forest of five places in that province the features of it's floristie composition,physiognomy and structure are ge- neralized. In this paper,first of all we describe the environmental conditions, under which the broad-leaf evergreen forest is located.It is explained,the...

The broad-leaf evergreen forest is the most important primary vegeta- tion type of subtropical region in China.Chekiang province is one of the main provinces in which this type distributes.On the basis of investiga- tions of broad-leaf evergreen forest of five places in that province the features of it's floristie composition,physiognomy and structure are ge- neralized. In this paper,first of all we describe the environmental conditions, under which the broad-leaf evergreen forest is located.It is explained,the broad-leaf evergreen forest is a characteristic vegetation type which have developed under the condition of subtropical monsoon climate of East Asia. According the notes of 21 plots from five places in the broad-leaf evergreen forest of Chekiang province about 428 species of vascular plant were calculated,which belong to 105 families and 225 genera.In the dicotyledonous plants the species of Fagaceae,Lauraceae and Theaceae families are abundent,they are all fundamental components of tree layer.The dominants of community are concentrated on a few genera, such as Castanopsis,Lithocarpus,Cyclobalanopsis,Quercus,Camellia Eurya,Machilus,Cinnamomum,Lindera,Litsea,Rhododendron,Photinia and Prunus. In addition,the geographical elements of flora in broad-leaf evergreen forest were analysed.It was told,that they have a tight connexion with the tropical flora,especially have a common history in a long peroid with the tropical flora of South-East Asia.The high percentage of genera distrubuting in temperate zone and East Asia is one of the features of Broad-leaf evergreen forest in the east part of China.A large number of endemic species of subtropic in China further expresses that the broad- leaf evergreen forest is a distinct type in the subtropical region of China.

文章根据对浙江省五个地点的常绿阔叶林的调查,对其种类成份、外貌和结构的特征,作了汇总分析。在本文中,首先讨论了常绿阔叶林所在的环境条件,说明我国常绿阔叶林是在东亚亚热带季风气候条件下孕育的一种特殊的植被类型。根据五个地点21个样地的统计,组成浙江常绿阔叶林的维管束植物共约428种,分属于105科,225属。在双子叶植物中壳斗科、樟科、山茶科的种类最多,它们均是构成林木层的基本成份。群落的优势种集中在少数的属中。如壳斗科的 Castanopsis,Lithocarpus,Cyclob-alanopsis,Quercus,山茶科的 Camellia,Eurya,以及樟科的 Machilus,Cinnamomum,Lindera,Litsea 和杜鹃花科的 Rhododendron 以及蔷薇科的 Photinia 和 Prunus 等。同时还分析了常绿阔叶林区系的地理成份,分析表明它们与热带区系有着密切联系,尤其是与热带东南亚植物区系存在着较悠久的共同历史。温带、东亚分布类型的属的较高比例是我国东部亚热带常绿阔叶林的特征之一。中国亚热带特有种类的大量存在进一步表明了常绿阔叶林是我国亚热带地区的一种特有类...

文章根据对浙江省五个地点的常绿阔叶林的调查,对其种类成份、外貌和结构的特征,作了汇总分析。在本文中,首先讨论了常绿阔叶林所在的环境条件,说明我国常绿阔叶林是在东亚亚热带季风气候条件下孕育的一种特殊的植被类型。根据五个地点21个样地的统计,组成浙江常绿阔叶林的维管束植物共约428种,分属于105科,225属。在双子叶植物中壳斗科、樟科、山茶科的种类最多,它们均是构成林木层的基本成份。群落的优势种集中在少数的属中。如壳斗科的 Castanopsis,Lithocarpus,Cyclob-alanopsis,Quercus,山茶科的 Camellia,Eurya,以及樟科的 Machilus,Cinnamomum,Lindera,Litsea 和杜鹃花科的 Rhododendron 以及蔷薇科的 Photinia 和 Prunus 等。同时还分析了常绿阔叶林区系的地理成份,分析表明它们与热带区系有着密切联系,尤其是与热带东南亚植物区系存在着较悠久的共同历史。温带、东亚分布类型的属的较高比例是我国东部亚热带常绿阔叶林的特征之一。中国亚热带特有种类的大量存在进一步表明了常绿阔叶林是我国亚热带地区的一种特有类型。

 
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