Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 31300376 |
| 黄土高原农田生态系统蒸散组分区分及其环境影响 | |
| 阳伏林 | |
| 主持机构 | 中国气象局兰州干旱气象研究所 |
| 开始日期 | 2014 |
| 结束日期 | 2016 |
| 资助经费 | 210000(CNY) |
| 项目类别 | 青年科学基金项目 |
| 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 | Evapotranspiration (ET) consists of two components, soil water evaporation (E) and vegetation transpiration (T). It's crucial to partition quantificationally ET into E and T for accurately predicting the climatic response of agroecosystem water cycle. Loess Plateau is an important distribution area of dry farming in China, and sensitive response to climatic change. In this study, ET components (E and T) of spring wheat agroecosystem in Loess Plateau were investigated. Along the averaged annual precipitation gradient, three representative agroecosystems in Loess Plateau, Qingyang of Gansu province (semi-humid regions), Pingliang (transition zone between semi-humid and semi-arid regions), and Dingxi (semi-arid regions), will be selected for experimentation and observation. Stable isotope technique will be used to determine the ratio of ET components to ET; and eddy covariance technique will be used to determine the total ET, then partitioning ET into E and T. Shuttleworth-Wallace model (two-source model ) will be used to extend the ET partition period into the entire growing season. Through compare between three representative agroecosystems, the annual, seasonal and spatial variability characteristics of the ET components in Loess Plateau agroecosystems will be investigated. Meanwhile, the environmental factors (biological and moisture factors) in the agroecosystem will be also observed. We are attempt to explore the mechanism of environmental factors, such as dew, on the ET components in Loess Plateau agroecosystems. |
| 中文关键词 | 农田生态系统 ; 涡度相关 ; 稳定同位素 ; 蒸散组分区分 ; 双源模型 |
| 来源机构 | 中国气象局兰州干旱气象研究所 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/346636 |
| 推荐引用方式 GB/T 7714 | 阳伏林.黄土高原农田生态系统蒸散组分区分及其环境影响.2014. |
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