林木

The result showed that 1: 1 or 1: 2 were the choice of the ratio of hosts and wasps when choosing fall webworm as a host and 1: 50 when choosing Antheraea pernyi as a host to mass rearing C.

美国白蛾作为国际性检疫害虫，近几年相继在我国很多地方出现，不仅使林木受到不同成度的危害，同时给人们生产生活带来不便。

Human vision,like that of other primates,has evolved in an arboral environment.

人类的视觉如同其他灵长类动物一样，在有林木的环境中进化起来的。

Somatic incompatibility test showed that the density of Armillaria ostoyae genet was lower in the northeast forest of the Changbai Mountain, and it existed in rhizomorphs which was main dissmination mode.

利用体细胞非亲和性的试验方法，鉴定出东北地区林木病原菌奥氏蜜环菌在林间的遗传体密度较低，是以菌索的形式存在，并为主要传播方式。

Chinese medicinal herbs cultivation reached more than 20 kinds of types, there are schisandrin, ginseng, asarum, gentian, Campanulaceae, and keel and so on, the fruit tree seed red pine, walnut, hazelnut, etc., seedlings are green seedlings spruce, fir , Pinus sylvestris, birch, such as Acer mono.

中药材种植种类达二十多种，有五味子、人参、细辛、龙胆草、桔梗、地龙骨等，林木种子果实有红松籽、核桃、榛子等，苗木有绿化苗木云杉、冷杉、樟子松、桦树、色木槭等。

All these studies put scientific basic for rational management for sustainable coastal protection forest of Casuarina equisetifolia, and meet the demand of the construction of coastal prevent system project.

虽然国外大量的研究表明，细根在森林生态系统的物质循环和能量流动中发挥着巨大的作用，但我国对林木细根的研究还是停留在国外20世纪70年代末、80年代初的水平上，对细根在森林生态系统中的主要作用认识不足。

The above procedure can not only construct health indicators of Casuarina trees, but also evaluate the health conditions of stands at the same time, and then the manager can proceed the stands conservation and management with the objective and effective methods.

此种分析程序不仅可以建立木麻黄林分健康指标，同时可以透过量化指标与可实测的变数，评估个别林木的健康状态，使经营者能以客观有效的方式进行林分的保育与管理。

The Lymantia xylina is a serious pest in the casuarina windbreaks which caused a lot of damage to some economic orchards and many forest plant species.

中文摘要黑角舞蛾为台湾木麻黄森林最严重的害虫之一，另其亦危害多种果树及林木。

Anoplophora glabripennis Motshulsky (Coleoptera: Cerambycidae) is one of the most destructive insect borers of poplar trees in China. In recent years millions of poplar trees were damaged to death or near death in"Three-North Area", which caused heavy losses economically, ecologically and socially. Through the study on host selecting behaviors and behavioral responses to plant volatiles of A.

中文题名光肩星天牛对寄主植物挥发性物质的行为反应及作用机理的研究副题名外文题名 Behavioral responses and mechanism of Anoplophora glabripennis to host volatile compounds 论文作者李建光导师尹伟伦骆有庆金幼菊教授学科专业植物学研究领域\研究方向植物与昆虫的关系学位级别博士学位授予单位北京林业大学学位授予日期2001 论文页码总数129页关键词森林病虫害光肩星天牛寄主选择挥发性物质馆藏号BSLW /2003 /S763 /6 光肩星天牛Anoplophora glabripennis是我国最重要的一种林木蛀干害虫。

Lower-crown of suppressed trees had greatest specific leaf area values that increased photosynthetic area when Chamaecyparis obtusa var. formosana trees were shaded.

比叶面积的变化，以被压木之下层树冠内部具最大的比叶面积值，台湾扁柏林木受遮荫时，以增加叶及树冠光合面积来维持生长。

The seedlings could be regenerated naturally under forest canopy and are considered as shade-tolerance species. For exploration the adaptability strategy of Chamaecyparis obtusa var.

小苗可於冠层孔隙下下种更新成苗，而被视为耐荫性树种，然对於已更新成长为幼木阶段的台湾扁柏林木，其对现有林分环境的生长调适能力的暸解尚有限。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了