populus的例句大全

Study on the control index of swollen stem canker of Populus simonii × nigra

小黑杨肿茎溃疡病防治指标的研究

Compare on the Different Genome DNA Extracting Methods for Mature Populus tomentosa Leaves Variation Analysis on Anatomical Properties and Chemical Compositions between Chinese White Poplar and Burl

毛白杨成熟叶片基因组DNA提取方法的比较研究毛白杨与瘿瘤解剖特性和化学组成变异分析

Any of several fast-growing deciduous trees of the genus Populus having unisexual flowers borne in catkins. A wild mountain ash ( Pyrus decora) of eastern North America.

美国鹅掌揪几种鹅掌楸属中快速成长的落叶乔木的一种，其花为单性穗状花花楸北美东部的一种野生花楸（装饰梨）

Evaluation of comprehensive benefit on two kinds of Populus Farmland Shelterbelts

两种杨树农田防护林综合效益评价

Genetic variation of 11 sib-families ( 145 clones) from Populus deltoides germplasm established by Nanjing Forestry University was analyzed on phenotype and molecular level, which provided the base for the polar breeding in future.

本文从表型与分子两个层次上对南京林业大学建立的美洲黑杨种质资源库中的11个家系，145个无性系进行遗传变异研究，为将来杨树育种提供科学的依据。

Study on Comparison of Salt-Resistance Abilities Among Different Populus Tomentosa Clones and Gene Transformation for Salt Tolerance

毛白杨无性系耐盐性比较与转耐盐基因的研究

By using orthogonal design was selected the optimum medicament combination and stock species of bud grafting for Populus davidiana × P.

采用正交试验设计方法，对山新杨芽接药剂选择及嫁接砧木品种选择进行试验，选出较合适的药剂组合及芽接砧木品种。

Analysis of Salt-tolerant Characteristics and Primary Selection of Its Salt-tolerant Variants from Tube Plants of Triploid Populus Tomentosa

毛白杨试管苗耐盐性分析及耐盐植株初选

Taking the utilizing rate of irrigation water as the core and according to plant physiology and ecology and growth of trees, the theory and technology of water saving irrigation in Populus tomentosa intensive plantation was studied systematically for eight years in succession.

以提高灌溉水利用率为核心，以植物生理学和生态学以及树木生长为依据，连续8年对毛白杨速生丰产林节水灌溉的理论与技术进行了较为系统的研究。

populus tomentosa carr. is an indigenous tree species in china and widely employed for forestation and landscape in northern china.

毛白杨是我国特有的乡土树种，广泛应用于城市园林绿化，工业人工林和农田防护林建设。

effect of planting density and site type in populus diltoides forests for veneer board

杨树单板用材林的栽植密度与立地效应研究

through production of in vitro seedling and trial of seedling planting in warm shed and open field, craft process of industrialization breeding of populus tomentosa was put forward in its 3 continuous courses of inoculation, cultivation, transplant and nursery garden management stages in this paper.

通过组培苗生产、温棚炼苗和大田炼苗试验，研究出了包括接种培养阶段、移栽和苗圃管理阶段3个连续过程的三倍体毛白杨工厂化育苗的工艺流程。

application of heat-pulse technique to determine the stem sap flow of populus euphratica

热脉冲技术在确定胡杨幼树干液流中的应用

a study on the stem sap flow of populus euphrtaicr and tamaris spp. by heat pulse technique

应用热脉冲技术对胡杨和柽柳树干液流的研究

tissue culture and clonal propagation of stems from populus albaxp. berolinensis

银中杨茎的组织培养及快速无性繁殖

cloning and analyzing of cellulose synthase from populus ussuriensis

大青杨纤维素合成酶基因的克隆及分析

comparative studies of genomic dna extraction from populus ussuriensis

大青杨基因组DNA提取方法的比较

ecological and physiological research on va mycorrhizas of populus ussuriensis

大青杨VA菌根生理生态学研究

effect of arbuscular mycorrhizal fungi on the growth of populus ussuriensis

丛枝菌根对大青杨苗木生长的影响

meiosis of pollen mother cells and pollen development of populus ussuriensis

大青杨花粉母细胞减数分裂及其发育