Betula的例句大全

Throughfall and stemflow in a Betula platyphylla forest at the subalpine of Western Sichuan

川西亚高山白桦林穿透雨和茎流特征观测研究

Spectrophotometric Methods to Determine the Grand Total of the Triterpenoids in Betula

分光光度法测定白桦三萜类物质总量

However, little is known about the background of gene expression in flower phase of B. platyphylla, but several genes related to floral development were successfully cloned in Betula pendula in latest years.

然而白桦花期基因表达背景却鲜为人知，直到最近几年，若干花发育相关基因在欧洲白桦中才得以成功克隆。

Growth Traits and Selection of Fine Families of Young Betula pendula Seedlings

欧洲白桦早期生长性状表现与优良家系选择

The effect of medium and explant in organ regeneration of Betula pendula

外植体及培养基对欧洲白桦器官再生的影响

Studies on Rooting in Vitro and Transfer of Betula pendula Superior Clones from Germany

欧洲白桦优良无性系试管苗生根与移栽的研究

Effect of Exogenous Hormones on Organogenesis and Subculturing of Betula pendula

外源激素对欧洲白桦器官再生与继代培养的影响

The research results show that: ﹖ he distribution patterns of plant biodiversity are very different between Alnus hirsute, Betula platyphylla-swamp ecotones and Betula platyphylla-swamp ecotones along the hydrological environmental gradients from swamp to forest.

研究结果表明：①森林／沼泽交错群落植物多样性随着交错区环境梯度变化呈现出一定水平分布规律性。

Toadstools were collected from a range of pure stands of Betula and Pinus both in Britain and the U.S.A.

从英国和美国一系列桦木和松树纯林中收集蕈体。

In the late of colonizing, AMF mostly uses the form of vesicle to colonize rootlet of Betula albo-sinensis.

在侵染后期，AMF主要以泡囊的形式侵染红桦根系；

MATERIAL AND METHODS: Betulin was isolated from dry powder of the bark of silver birch ( Betula platyphylla Suk) by using ethanol circumfluence, decompress concentration and methanol-chloroform recrystallization.

材料与方法取一定量的白桦树皮干粉，通过乙醇回流，减压浓缩和甲醇-氯仿重结晶等步骤获得白桦酯醇纯品。

The Effects of Fertilization on the Growth and Development and Expression of Several MADS-box Genes of Betula Platyphylla

施肥对白桦生长发育和几个MADS-box基因表达的影响

EUROPE A Trial on Grafting of Betula pendula

欧洲白桦嫁接试验

Study on cohort structure of Betula platyphylla population in virgin forest, northern region of Daxing'anling mountains, china

大兴安岭北部地区原始林白桦种群的世代结构

A preliminary study on Space Mutation Breeding in Betula platyphylla

白桦航天诱变育种研究初报

studies on wood anatomy of betula platyphylla's root

白桦根的木材解剖学研究

shrinkage characteristics of castanopsis hystrix and betula alnoides plantation wood

红锥和西南桦人工林木材干缩特性的研究

niche relationships between betula platyphylla and main understory herbages in forest - steppe ecotone of daxingan -ling mountains .

大兴安岭森林草原过渡带白桦及主要草本植物生态位关系的研究。

the origin of some natural betula l. stand is seedling. some are sprout forest.

桦树天然林的起源有实生的，也有萌生的。

fast-growing individual plant selection of betula alnoides

西南桦速生单株选择