Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 31501276 |
| 黄土高原旱作小麦土壤呼吸及组分对长期施氮与降雨的响应 | |
| 宗毓铮 | |
| 主持机构 | 山西农业大学 |
| 开始日期 | 2016 |
| 结束日期 | 2018 |
| 资助经费 | 200000(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 | In the global terrestrial ecosystem, soil respiration is the main factor that determine the carbon balance. So to clarify the variation mechnisms of soil respiration is the basis that accurately assess the terrestrial carbon sink. In most agroecological systems in the Loess Plateau region, long-term nitrogen （N） fertilization significantly influences on soil organic carbon decomposition and soil respiration, as a result to change carbon balance. In this study, soil respiration will be investigated in a rainfed wheat ecosystem which has been applied N for 10 years. The SOC compsition of different soil layers will be measured to clarify the effects of long-term N application on SOC accumulation and decompsition. Soil respiration and its components will be measured with the LI-8150 automated soil CO2 flux system and the corresponding environmental factors will be measured with several automatic meteorological instruments. The soil respiration mechnism, thus, will be discussed. And the response of soil respiration to precipitation was analyzed. Moreover, the temperature sensitivity of soil respiration and its components in rainfed wheat ecosystem will be researched. The Q10 function will be assessed with analysis of multiple factors. Overall, the above works would improve our understanding on soil respiration regulation mechnism, and contribute to accurately assess the soil carbon sink on the Loess Plateau region. |
| 中文关键词 | 土壤呼吸 ; 碳循环 ; 黄土高原 ; 氮肥 ; 旱作 |
| 来源机构 | 山西农业大学 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/346906 |
| 推荐引用方式 GB/T 7714 | 宗毓铮.黄土高原旱作小麦土壤呼吸及组分对长期施氮与降雨的响应.2016. |
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