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- Keywords red birch （Betula albosinensis） seedlings;elevated CO_2;planting density;competition;nutrition;senescence; 红桦幼苗;CO_2浓度升高;种植密度;竞争;养分;衰老;
- Betula Albosinensis 红桦(桦木科)
- Betula pendula × B. pendula var. cardica Sok. 欧洲白桦
- Studies on the Chemical Constituents of the Leaves of Betula platyphylla Suk. 白桦叶化学成分的研究
- 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。
- Diffuseporous wood is seen for example in yellow birch (Betula lutea). 加拿大桦（黄桦）的木材即为散孔材。
- Carbon storage of and Betula albo-sinensis were higher than other three types. 锐齿栎、油松主要分布于中低海拔地带；
- 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。
- A pair of primers was designed based on the analysis of MADS3 from Betula petulla and AP1 from Arabidopsis thaliana. 在分析了欧洲白桦MADS3与拟南芥AP1中的保守性后,设计了一对引物。
- The fluctuant and conventional drying technologies for22 mm-thick Birch( Betula platyphylla) were tested and compared. 进行了桦木波动干燥工艺和常规干燥工艺的对比试验。
- We still skim the backwaters of ponds and streams for the seed of Betula, Acer Salix and Populus species. 我们仍然要在池塘的静水上和溪流中捞取桦木，槭树、杨、柳等树的种子。
- The genetic variations of seedling traits among open-pollinated families of plus trees of Betula luminfera H. Winkl. 光皮桦优良单株自由授粉子代苗期性状的遗传变异。
- Betula ermanii and Alnus mandshurica predominated in the colonizing woody species on forest boundaries. 林缘入侵物种主要由岳桦和东北赤杨组成。
- Current status of the study on seeds resource and propagation of Betula platyphylla Suk. 白桦种源及繁殖的研究现状
- 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。
- 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。
- The effect of moisture content on seed longevity of 3 Betula luminifera families (3, 20 and 22) was explored. 摘要研究了不同家系（3、20、22号）光皮桦种子在不同含水量条件下的贮藏寿命。
- In the zonal area from 500 to 700m, 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。
- The author discussed the recent use,economic results,growth technology and expand prospect of Betula Luminifera. 对光皮桦资源的利用现状、经济效益、造林技术及发展前景进行了论述。
- The coMpetition aMong doMinant species of Betula luMinifera forests at WeiMing, in Fujian province, has been discussed. 研究了福建省卫闽光皮桦林内优势树种间的竞争关系。
