Betula

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

互联网摘选

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

互联网摘选

In coMpetition with other accoMpanying species, the Betula luMinifera is a predoMinant tree at present.

另外,光皮桦在与其它主要伴生树种的竞争中, 目前处于优势地位.

互联网摘选

Response of dry matter allocation and nutrition of red birch ( Betula albosinensis) seedlings to elevated CO_2

红桦幼苗干物质分配与营养对CO2升高的响应

互联网摘选

In all factors of vegetation structure characteristic, the average height of shrubs, the average canopy of trees and the average canopy of grass are difference factors in whole level, and the density of Black birch ( Betula dnvurica) is difference factor in specific composition level.

各样地的植被结构特征因子中，灌木平均高度、乔木平均盖度（郁蔽度）、草本平均盖度是各样地在总体水平上的差异因子，黑桦密度是样地树种组成水平上的差异因子；

互联网摘选

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。

互联网摘选

To oak trees, Betula , Chatham, Yang and other broad-leaved forest dominated.

树种以栎 、 桦、漆 、 杨等阔叶林为主.

互联网摘选

The microwave-assisted extraction ( MAE ) of betulin from Betula platyphylla Suk.

利用均匀设计法优化了微波辅助提取白桦树皮中桦木醇的工艺.

互联网摘选

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；

互联网摘选

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

互联网摘选

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

互联网摘选

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

互联网摘选

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。

互联网摘选

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

互联网摘选

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。

互联网摘选

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

互联网摘选

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。

互联网摘选

A new method of determining the antioxidant activity of betulin from betula bark is established.

建立了一种测定白桦树皮中白桦脂醇对羟自由基清除率的新方法.

互联网摘选

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

互联网摘选

A preliminary study on Space Mutation Breeding in Betula platyphylla

白桦航天诱变育种研究初报

互联网摘选

EUROPE A Trial on Grafting of Betula pendula

欧洲白桦嫁接试验

互联网摘选

Arimatsu economic timber , Parkinson , Chatham , Betula, Tilia, Green and other species.

经济用材林有松 、 柏、漆、桦 、 椴 、 青等树种.

互联网摘选

For your career, Betula forest without relying on heaven-sent, mainly by self-seeking.

适合你的事业, 白桦林不靠天赐, 主要靠 自我 寻找.

互联网摘选

In the zonal area from 500 to 700 m , plant community is Betula ovilifolia-Carex schmidtii-Sphagnum palustre community.

距河流500-700m的带状区域植物群落为油桦-臌囊苔草-泥炭藓群落.

互联网摘选