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Investigation showed that the road Tai'an City Green application of a total of 70 plants, of which 22 species of street trees, with the main species Sophora japonica, P.tomentosa, wax, paulownia, privet, few hairs; Green belt 50 kinds of plants, including Magnolia, Lagerstroemia, lobular privet, Purple BARBERRY lone, oriental arborvitae, cedar, readleaf cherry plum in vitro, pomegranates, Forsythia, Di-tang, and Rose Hosta such perennial flowers.

调查表明,泰安市道路绿化应用的植物共有70多种,其中行道树22种,主要树种有国槐、毛白杨、白蜡、泡桐、女贞、五角枫等;绿化带植物有50 多种,主要包括白玉兰、紫薇、小叶女贞、紫叶小檗、龙柏、侧柏、雪松、紫叶李、石榴、连翘、棣棠、玉簪以及月季等宿根花卉。

In different height seedlings,4.0m and 4.5m are sensitive to the grafting,especially to the tree from 4.0m seedling in height,of which main trunk and diameter breast-high might be largest after two times grafting,which can decrease the cost of plantation establishment and increase the economic performance.

在不同初植苗高的泡桐中,4.0m、4.5m的苗高对接干反应较为明显,尤其是4.0m高的苗木通过一次和二次接干后,其胸径和全高生长量都达到最大,其为降低泡桐造林成本,提高经济效益有一定的指导意义。

Compared to the CK,grafting (included one time grafting and two times grafting) can decrease the tree crown and diameter breast-high and increasethe crown length and the tree height on five-year-old paulownia with different height seedlings.

与对照相比,接干对不同初植苗木高度五年生泡桐树冠的冠幅和胸径的增长量小于对照,但是增大了冠长和树高。

For being the ability of excreting cantharidin, it keeps a long history of pharmacological usage in different countries of the world.

红头芫菁成虫群集性很强,常聚集在泡桐树中取食泡桐叶片,继而为害豆科等植物,其毒素斑蝥素在医学上有着重要的研究价值。

Chinaberry witches'broom, Ziziphus jujube witches'broom, Mulberry dwarf disease, JWB and Paulownia witches' broom phytoplasmas were identified by comparative studies of PCR amplify of phytoplasmal 16SrDNA、23rDNA and ribosomal protein gene, heteroduplex mobility assay, RFLP of PCR-amplified products (16S rDNA), cloning and sequence analysis of 16SrDNA and rp gene. An efficient procedure for rapid identification and differentiation of phytoplasmas was established, which could identify and differentiate phytoplasma collected from field.

通过对桑萎缩病、枣疯病、酸枣丛枝病、泡桐丛枝病和苦楝丛枝病植原体16SrDNA、23SrDNA和核糖体蛋白基因的PCR扩增、异源双链迁移率分析、16SrDNA PCR产物的限制性片段多态性分析以及植原体16SrDNA和rp基因的克隆和序列分析等比较研究,建立了一种快速确定未知植原体种类和分类地位的分子鉴别与鉴定优化程序;此程序可对田间采集的各种植物植原体样品直接进行快速鉴定和鉴别。

It was studied in this paper that the effects of aqueous alkali on the penetration and the color of paulownia wood after soaking in NaOH aqueous solution.

用NaOH的稀溶液处理泡桐木材,观察桐木渗透性、木材颜色的变化,并就碱液对泡桐木材漂白效果的促进作用进行了研究。

However,Because of its pseudo dibranch biological characteristic,main trunk height mostly is decided by the height of seedling on the natural conditions,which had greatly affected on Paulownia timber productivity.

由于泡桐假二叉分枝的生物学特性,在自然条件下,苗高往往就决定了主干的高度,给泡桐生产造成了巨大的经济损失。

Paulownia wood stain is a serious problem in wood process, which severely affect paulownia wood utilization and successful and sustainable development of paulownia production, it is also a international scientific difficulty that has been paid much more attention to.

摘 要:泡桐材变色是目前严重影响我国泡桐木材加工利用和泡桐产业健康持续发展的一个重要问题,也一直是国内外学者十分关注的一个科学难题。

In this paper, the type of paulownia stain is identified, and on the basis of it, the study is carried out on the reasons of paulownia wood stain, way, law, and the research is also on tend of the change of wood components during the process of stain, the probe provide the theoretical evidence for paulownia wood stain control.

本文主要对泡桐木材变色类型进行鉴别测定,同时在此基础上,深入研究了泡桐木材变色原因、变色历程、变色规律,并揭示了泡桐木材变色过程中木材成分变化趋势,为泡桐木材变色防治提供了理论依据。

Paulownia wood stain is a serious problem in wood process, which severely affect paulownia wood utilization and successful and sustainable development of paulownia production, it is also a international scientific difficulty that has been paid much more attention to.

常德龙,方桂珍,刘一星 02/25/2004摘要:泡桐材变色是目前严重影响我国泡桐木材加工利用和泡桐产业健康持续发展的一个重要问题,也一直是国内外学者十分关注的一个科学难题。

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推荐网络例句

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因,如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务,你就做你的事好了。

Who is in possession of this?

这是谁的?