P.occidentalis L是什么意思

网络释义

用法例句

A Study on Character Variation of the P.occidentalis L. Seed Source at Seedling Stage;

美国悬铃木种源苗期的性状变异

The Study on Rooting Rate Genetic Variation of Platanus occidentalis Clones cutting;

北美悬铃木无性系生根特性遗传变异研究

The tree species of Platanus acerifolia and Platanus orintalis have 2～6 heads of fruits on per infructescence; However, the American sycamore (Platanus occidentalis L.

悬铃木属树种中,北美一球悬铃木每果枝只有一个头状花序合果,果实无刺,且在树体大小相同的情况下,其开花结实量只有其它两树种的一至二成,与其它二种悬铃木比较更适于作行道树;一球悬铃木树形伟岸,树姿优美,树冠圆满,枝叶繁茂;具有良好的遮阴,降温增湿,减少噪音,净化空气等环境生态效益;抗空气污染能力较强,抗烟尘性强,滞尘量大;适应性强,对土壤的适应性极强,能耐干旱、耐瘠薄、耐水湿;生长快,寿命长,耐修剪,易整形,能适应城区复杂的立地环境。

Research progress on chemical constituents and biological activities of Platanus spp.;

悬铃木属植物的化学成分及其生物活性研究进展

Study on Provenances-family of Platanus occidentalis

北美一球悬铃木种源-家系试验研究

Studies on the Clonal Selection on and Mass Propagation by Tissue Culture and Somatic Embryogenesis of Platanus Occidentalis;

北美一球悬铃木无性系选育及其体胚发生等快繁技术研究

High-Efficient Tissue Culture System Establishing and Gene Transformation in Platanus Occidentalis L.;

北美—球悬铃木转基因受体系统的建立及遗传转化研究

Tissue Culture of Platanus Occidentalis L. and Salt Tolerant Gene Transformation with Safe Selection System;

北美—球悬铃木组织培养及利用安全筛选标记基因进行耐盐转基因研究

Clonal Selection among/within Provenance/Families, Cutting Propagation and Cold Hardness Analysis on Platanus Occidentalis L. Introduced from United Stats of America;

一球悬铃木无性系选育及相关性状分析研究

Genetic Variation on Growth and Genetic Diversity of Half-sib Families among Provenince of Platanus Occidentalis L. in Eastern China;

一球悬铃木种源内家系生长遗传变异及遗传多样性

Genetic Variations and Growth Traits on Clones of Platanus occidentalis during Seeding Stage

一球悬铃木无性系苗期生长性状遗传变异与选择研究

Investigation and control measures of Platanus acerifolia pests in Huabei oil field

华北油田悬铃木害虫种类调查及防治研究

Studies on Plant Regeneration in Vitro and Ploidy Breeding of London Plane Tree (Platanus Acerifolia Willd.);

二球悬铃木离体植株再生及倍性育种的研究

Identification of Genetic Variation of None Cones Platanus Acerifolia by Amplified Fragment Length Polymorphism;

利用AFLP分子标记鉴定无球悬铃木的遗传变异

The study of forming crown factor of influence plan tree less-fruit-ballizing after graft and transformation;

影响悬铃木少球化嫁接改造后成冠因素的探讨

The technical transformation study of grefting shade tree of planetree less-friuit-ballizing;

行道树悬铃木少球化嫁接改造技术研究

Effect of branch and stem pruning on photosynthetic characteristics of Platanus acerifolia L.

修枝截干对二球悬铃木叶片光合特性的影响

Nutritional Components and Utilizations of Fresh Leaves Pruned from Platanus acerifolia L. in Early Season

二球悬铃木早季修剪鲜叶的营养成分及利用

Any of several trailing forms of the blackberry, such as Rubus hispidus of North America and R. caesius of Europe.

悬钩子，露珠莓一种黑芽的悬钩子品种，如生于北美洲的刺状悬钩子和生于欧洲的欧洲木莓

The resistance of chinar, hawthorn and ural falses piraea are relatively low, which maybe bring problems.

二球悬铃木、山楂等抗性相对较弱,使用再生水灌溉可能产生问题。

Dynamic changes of leaf growth and three physiological indexes of Platanus ×acerifolia during leaf expansion stage

二球悬铃木展叶期叶片生长及3个生理指标的动态变化

straggling shrub of northwestern North America having foliage with a bluish tinge and umbels of small bell-shaped flowers.

北美西北部脱离的灌木，有蓝色的树叶和小铃铛状的花的伞状花序。