Doctoral Dissertation Research: Soil Resource Aggregation and Ecosystem Function

博士论文研究：土壤资源聚集与生态系统功能

• 批准号: 0608320
• 负责人: G. Philip Robertson
• 金额: $ 0.96万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0608320&HistoricalAwards=false
• 关键词: Doctoral; Dissertation; Research; Soil; Resource

The use of nitrogen fertilizers has dramatically increased food production globally. Nonetheless, nitrogen fertilizer use can also have negative impacts on water, air, and soil quality. Many of the processes that regulate nitrogen movement in ecosystems have been determined; however, environmental heterogeneity makes predicting the behavior of these processes in the field difficult. To date, strategies to examine nitrogen cycle processes have largely ignored the role of spatial heterogeneity for regulating important processes such as soil organic matter decomposition and its associated nitrogen release. This proposal seeks to better understand how heterogeneity affects soil microbial processes, plant root growth, and nitrogen acquisition by plants. Results from this research will add significant insight into predictions of biogeochemical cycling rates in complex systems. They will also aid outreach efforts in K-12 science teacher training and agricultural land management in the southern Michigan area.

氮肥的使用大大提高了全球粮食产量。 尽管如此，氮肥的使用也会对水、空气和土壤质量产生负面影响。 许多调节氮在生态系统中运动的过程已经确定，然而，环境的异质性使得预测这些过程在现场的行为变得困难。 迄今为止，研究氮循环过程的策略在很大程度上忽略了空间异质性对调节土壤有机质分解及其相关氮释放等重要过程的作用。 该提案旨在更好地了解异质性如何影响土壤微生物过程，植物根系生长和植物氮素吸收。这项研究的结果将为复杂系统中地球化学循环速率的预测提供重要的见解。他们还将帮助密歇根州南部地区K-12科学教师培训和农业土地管理的推广工作。