Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 31470320 |
| 珍稀沙生植物茧荚黄耆的繁殖特性与种群更新的关系研究 | |
| 谭敦炎 | |
| 主持机构 | 新疆农业大学 |
| 开始日期 | 2015 |
| 结束日期 | 2018 |
| 资助经费 | 850000(CNY) |
| 项目类别 | 面上项目 |
| 资助机构 | CN-NSFC（国家自然科学基金） |
| 语种 | 中文 |
| 国家 | 中国 |
| 英文简介 | The research on the relationships between the reproduction characteristics and population recruitment of rare plants can play an important role in revealing their threatened mechanism theoretically. The reported studies on plant population recruitment mainly focus on seed source, dispersal features and seedling establishment, little is known about the effects of reproduction characteristics on the population recruitment. Astragalus lehmannianus is a rare desert species of Astragalus (Fabaceae) that is distributed narrowly in the southern margin of the Gurbantunggut Desert of northern Xinjiang. In this project, we select Astragalus lehmannianus as a target species, and A. flexus, a sympatric cosmopolitan species of Astragalus, as a contrast species. Based on the investigation of the distribution regions, the assessment of the threatened status and the ascertainment of the endangered category of A. lehmannianus, we will focus on the researches about the relationship between the floral syndrome and the reproduction success and seeds dispersal, the influence of herbivores on reproduction and the relationship between seed germination and seedling establishment, analyze the impact of the special floral syndrome on reproduction assurance and the enhancement of seed dispersal ability of this species, explore the effects of herbivory and seed abortion on seed source and seedling establishment, explicit the type of seed dormancy, the type of soil seed bank and the environmental condition of seed germination and seedling establishment, reveal the biotic and abiotic factors that restrict the population regeneration. These results will not only provide theoretical and technical guidance for revealing the threatened factors and developing the strategies of population recovery and conservation of A. lehmannianus, but also accumulate theoretical information for exploring the diversity of ecological adaptation of desert plants. |
| 来源机构 | 新疆农业大学 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/345770 |
| 推荐引用方式 GB/T 7714 | 谭敦炎.珍稀沙生植物茧荚黄耆的繁殖特性与种群更新的关系研究.2015. |
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