populus

Effects of Site Condition on Growth and Spatial Differences of Soil Nutrient in Populus simonii Carr.

与小叶杨人工林生长及土壤养分空间差异的影响>>相似的文献.

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The tissue culture system of Cathay Poplar ( Populus cathayana) was developed in the present paper.

建立了青杨（Populus cathayana）组织培养系统。

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Objective : To obtain the fragment related to rooting gene of mutant Populus tomentosa.

目的: 克隆芽变毛白杨生根相关基因片段.

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Establishment of Asepsis Tissue Culture System from Suckers of Populus tomentosa Carr. Review on the Study of Chinese Fir Sprout Regeneration

毛白杨根萌芽建立无菌组培体系的研究杉木萌芽更新

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Populus me sibilat, at mihi plaudo Ipse domi simul ac nummos contemplar in arca.

笑骂由你,我自为之;家藏万贯,唯我独赏.

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Grafting Triploid Populus tomentose Carr. with Different Rootstock Studies and Application on the Effective Components of Snowbell-leaf Tickclover and Rhubarb Root

三倍体毛白杨不同砧木嫁接试验广金钱草及土大黄有效成分研究与应用

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Ecological and Physiological Research on VA Mycorrhizas of Populus Ussuriensis.

大青杨VA菌根生理生态学研究.

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Effect of NaCl stress on photosystem ⅱ functions in Populus nigra leaves

NaCl胁迫对欧洲黑杨组培植株叶片光系统Ⅱ功能的影响

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Research of cold resistance of new Populus Euramerican a variety

欧美杨新品种抗寒性的研究

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Changes in pulp characteristics of aspen ( Populus tremloides) mechanical and high yield pulps during recycling have been studied and compared with spruce thermomechanical pulp.

研究了颤杨机械浆和高得率浆在回用过程中性质的变化，并对照研究了黑云杉热磨机械浆的回用性能。

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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

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The CesA gene promoter MDCesAP was amplified from triploid Chinese white poplar ( Populus tomentosa Carr. )

从三倍体毛白杨-93 ( PopulustomentosaCarr. ) 中分离得到了MDCesAP这 一木质部纤维素合酶基因启动子.

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Days of the original desert song Populus place A good place!

天漠胡杨的原创歌曲里的地方.好地方!

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Main tree species are pine, northern larch, oriental arborvitae, tree, Populus, etc. more than 40 kinds.

主要树种有油松 、 华北落叶松 、 侧柏 、 栎树 、 山杨等40余种.

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Seven different treatment measures are taken, aquasorb mix soil+ rooting powder, aquasorb mix soil, rooting powder dipping the root, film mulching, straw mulching, pebble mulching, film mulching+ aquasorb mix soil, and the test tree planting is populus alba.

采用了保水剂拌土+生根粉、保水剂拌土、生根粉蘸根、覆膜、覆秸秆、覆石头和覆膜+保水剂拌土七种造林技术措施，试验树种为银白杨。

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Oxygen Delignification and Strengthened Oxygen Delignification of Triploid of Populus Tomentosa of Soda-AQ pulp with Lower-kappa Number

三倍体毛白杨低硬度化学浆氧脱木素和强化氧脱木素的研究

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By determination and theory, actual consumption of Populus simon ii x nigra was analysed and studied.

通过观测和理论推导, 分析研究了小黑杨幼龄林对土壤水的实际消耗量.

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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

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The contrast analysis shows that, the timber physic mechanics character is similar with the other species of Populus. The main orientation of timber utilization is pointed out.

对比分析可知其木材物理力学性质与杨属类其它种木材相近，并指出其木材利用的主要方向。

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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

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The effects of litter layer on splash erosion in Populus davidiana woodland

山杨林地枯落物层对溅蚀的影响

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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。

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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

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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）

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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。

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Regenerating plants were produced from immature leaves of the triploid of Populus tomentosa by tissue culture on MS basic medium with different plant hormone.

采用毛白杨三倍体幼叶作为外植体进行组织培养，以MS为基本培养基获得了再生植株。

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A quantitative study on flower taxonomic characters of Populus tomentosa.

毛白杨花器分类性状的数量化探讨.

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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。

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Poplar ( Populus deltoides ) veneers were used to make plywood for concrete forms.

摘要采用浸胶玻璃纤维布强化方法制造杨木胶合板模板.

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All that is certain is that its cause lay in the struggles between plebs and populus.

只有一点是肯定的,这就是革命的原因在于平民和populus之间的斗争.

英汉非文学 - 家庭、私有制和国家的起源