| 1. | 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。 |
| 2. | Selection of betula luminifera and the effect analysis
光皮桦优树选择及效果分析 |
| 3. | Competition among dominant species in forest of betula luminifera
光皮桦林优势树种间的竞争 |
| 4. | Studies on observation of growth rhythm of young betula luminifera
光皮桦幼林生长节律的观察研究 |
| 5. | The fcature of betula luminifera seed
光皮桦种子质量特征 |
| 6. | Anatomical study on morphogenesis in vitro culture from betula platyphylla
白桦组培离体再生的解剖学研究 |
| 7. | Study on pre - humidification treatment for ultra - dried betula luminifera seeds
光皮桦超干种子回湿方法研究 |
| 8. | Development , utilization and expand prospect of betula luminifera resource
光皮桦资源的开发利用与发展前景 |
| 9. | A study on zoology and biological specific properties of betula luminifera winkl
光皮桦栽培生物学特性研究 |
| 10. | Analysis of genetic relationship of betula among species using rapd marker
标记技术对桦树种间亲缘关系的分析 |
