Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 41371004 |
| 温带干旱、半干旱区生物结皮对土壤有机碳稳定性的影响 | |
| 苏延桂 | |
| 主持机构 | 中国科学院新疆生态与地理研究所 |
| 开始日期 | 2014 |
| 结束日期 | 2017 |
| 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 | Studies on soil carbon flux in biologically crusted soil in Gurbantunggut desert have shown temperature sensitivity of soil carbon flux differed between crust types, and moreover, significant difference of soil carbon flux between crust types was dependent on precipitation size. These results suggest that physiological activities and soil organic carbon stability in crusted soil may be related with the development of biological soil crusts, and are responsible for variation in soil carbon flux. In this project, firstly, we will investigate soil carbon stability and its dependence on regional precipitation, temperature and soil texture, as well as biotic parameters of biological crusts in typical crusted soil of five chosen sites in northern China, and expect to elucidate the variability of soil carbon stability and its potential direct and indirect relations with the above parameters. Secondly, we will examine the soil organic carbon decomposition responses of a group of four soil particle sizes to a gradient of soil moistures and temperatures, and expect to know the dependence of soil organic carbon stability related with soil particle size on soil moisture and temperature in biologically crusted soil. At last, specifically taking biologically crusted soil in Gurbantunggut desert as an example, we will measure soil organic carbon decomposition after simulated precipitation in field and after additions of microbial selective inhibitors, glucose, starch, NH4NO3 in lab, and expect to elucidate effects of microbial functional type and microbial organic carbon utilization type in crust organisms on soil organic carbon stability. Through the above studies, we will elucidate the effects of biological soil crusts on soil organic carbon stability in arid and semiarid regions. |
| 中文关键词 | 生物土壤结皮 ; 荒漠土壤 ; 荒漠气候 |
| 来源机构 | 中国科学院新疆生态与地理研究所 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/345644 |
| 推荐引用方式 GB/T 7714 | 苏延桂.温带干旱、半干旱区生物结皮对土壤有机碳稳定性的影响.2014. |
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