Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 41371056 |
| 半干旱区凝结水的时空格局及其对植物碳同化的影响和调控机制 | |
| 刘美珍 | |
| 主持机构 | 中国科学院植物研究所 |
| 开始日期 | 2014 |
| 结束日期 | 2017 |
| 资助经费 | 750000(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 | Dew is an important potential water resource in arid and semi-arid regions, and is helpful to decrease plant evaporation and increase water content of plants in the case of soil water stress. Dew occurring in soil and plant leaves displayed different functions to plant water use and carbon assimilation with different mechanisms. There are significant differences of the stomatal conductance, carbon assimilation rate and water characteristics among C3, C4 and CAM plants. Through microlysimeter meter,isotope method and fluorescence microscopy in situ experiments in field and controlled experiments, the study aims to investigate the amount and persistence of dew and the dynamic trends of dew in soil and on leaves of dominant C3, C4 and CAM plants at three different habitats, such as fixed sandland, semi-fixed sandland, and lowland. The research will illustrate the effects of dew on the patterns of soil water content in surface and the driving factors of occurrence of dew, such as climatic parameters, vegetation coverage, leave's traits. Further, the research will clarify the pathway of directly absorbing of dew by plants, the amount and the places for transporting of absorbed dew in plants leaves. Moreover, the study will reveal the underlying eco-physiological and morphological mechanisms of plants with different photosynthetic pathway responding to the dew, and then we synthetically evaluate the ecological significance of dew in semi-arid ecosystem. The achievements from the research will be not only helpul for understanding the physiological mechanisms of plants adapt to the drought environment and the ecological functions of dew in semi-arid regions, but also could afford the scientific proofs for the protection of vegetation and restoration of ecology in this region. |
| 中文关键词 | 半干旱区 ; 凝结水 ; 时空格局 ; 植物碳同化作用 ; 浑善达克沙地 |
| 来源机构 | 中国科学院植物研究所 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/345590 |
| 推荐引用方式 GB/T 7714 | 刘美珍.半干旱区凝结水的时空格局及其对植物碳同化的影响和调控机制.2014. |
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