Research on the Relation between Active Iron in Leaves and Yellow-leaf Disease in Poplar Tree 叶片活性铁与杨树黄叶病的关系研究
But the poplar tree has grows quickly, is one of Yichun area fast-growing timber wood tree seeds. 而杨树具有生长快、是伊春地区速生用材树种之一。
HPLC Fingerprints in Distinguishing Propolis and Poplar Tree's Gum 蜂胶与杨树胶HPLC指纹图谱鉴别
Mao Duns classical prose "Praise and Admiration of Poplar Tree" had presented the new writing posture, then marked the lyrics prose transition of Chinese modern age. 茅盾的经典散文《白杨礼赞》呈现了新的写作姿态,进而标识了中国现代抒情散文的转折。
One red mitten lying lost under a poplar tree. 一只红色小猫迷惘地躺在白杨树下。
This article introduced poplar tree's fast-growing afforestation technology. 本文介绍了杨树的速生造林技术。
A tall poplar tree once stood there. 该处曾有一棵高大的白杨树。
I suddenly found that I do not know since when I was a poplar tree. 我突然发现,不知从什么时候起,我就是一棵白杨树。
For example, scientists are developing a genetically-modified poplar tree that is a more accessible source of cellulose for bioethanol production. 例如,科学家正在开发一种转基因杨树,从而为生物乙醇生产提供更容易获取的纤维素。
The data for establishing stem volume table of poplar tree were collected from 329 wood samples of the poplar trees in Anhui province. 以安徽省杨树人工林为研究对象,按照立木材积表编制要求,随机抽取329棵杨树伐倒木材积资料。
According to analysis of crown growth characteristics of two poplar species ( I-69, NL-80203), the paper studied the tending and managing technology of poplar tree belts. 通过对I-69杨和NL-80203树冠生长特性的分析,对同龄杨树林带抚育间伐技术进行了探讨。
With the method of high-pressured liquid chromatography, the content of secondary metabolites in branch xylem of& poplar tree species was analysed. 采用高效液相色谱法,对8个杨树树种枝条木质部次生代谢物质种类和含量进行了分析。
Processes the link is the poplar tree industry development key link. 加工环节是杨树产业化发展的重点环节。
Study of Eco-Physiological Factors Affecting Poplar Tree Photosynthesis on the Yangtze River Beach Land 影响滩地杨树净光合速率的生理生态因子研究
The Jiangsu Poplar Tree Industry Present Situation, the Question and the Development Countermeasure Studies 江苏杨树产业的发展现状及对策研究
The HPLC fingerprints of flavonoids in the authentic propolis, poplar tree's gum and adulterate propolis were determined in this paper. 从蜂胶的功效成分&黄酮类化合物着手,测定了真品蜂胶、杨树胶和搀假蜂胶的HPLC指纹图谱。
Analyzes Jiangsu from the industrial organization theory the poplar tree processing industry, we see, Jiangsu's poplar tree processing industry development phase also comparatively primary, in the market share overall is lower, but presented more obvious above elevates the tendency; 从产业组织理论分析江苏的杨树加工业,我们看出,江苏的杨树加工业的发展阶段还较初级,市场集中度总体上较低,但呈现出了较为明显的上升高趋势;
And current looks from the history, the Jiangsu poplar tree industry faces the more new development opportunity. 从历史和当前看,江苏杨树产业面临着较多新的发展机遇。
Effects of fertilization in the different site types of soil for poplar tree 杨树不同土壤立地条件施肥效应的研究
The Rudimentary Research high yielding Technology of forestation of Poplar Tree for Linkou 林口林区杨树丰产林营造技术的研究初探
How develops the poplar tree industry, according to Jiangsu at present the present situation and the existence question, its basic outlet lies in diligently increases the forest resources; 如何发展杨树产业,根据江苏目前现状和存在的问题,其根本出路在于努力增加森林资源;
The physiological characteristics of the causal organism of blister canker on poplar tree 杨树水泡型溃疡病菌生理特性的研究
Differentiation and Classification of Poplar Tree in Shelterbelts 杨树林带树木分化与分级的研究
"Praise and Admiration of Poplar Tree" had opened the new writing model, simultaneously also affected the modern age's arrangement of lyrics prose. 《白杨礼赞》开启了新的写作范式,同时也影响了现代抒情散文文脉的流延。
Studies on the Insect Community Structure and Diversity of the Poplar Tree in the North of Hebei Province 河北南部杨树昆虫群落结构及多样性研究
Countermeasures for Ecological Control on Diseases and Pests of Poplar Tree in Hubei Province 湖北省杨树病虫害生态防治对策
The research poplar tree processing industry to the correct assurance poplar tree industry development condition, has the extremely important practical significance. 研究杨树加工业对正确把握杨树产业的发展状况,具有十分重要的现实意义。
This paper is to study vertical coordination of Jiangsu Province poplar tree industry chain using transaction cost theory. 本研究是在产业链的框架下,以交易成本理论为基础,以江苏省杨树产业为例,研究了杨树产业链的纵向协作关系。
The insect pest is more serious with expanding of poplar plantation, which leads more damages. It is an effective method to control insect pest to breed new poplar tree species using genetic engineering technology. 随着杨树人工林面积的不断扩大,虫害问题越来越突出,危害严重,利用基因工程技术培育抗虫杨树新树种,是防治害虫的有效手段。