POWRE: Soil Organic Matter Fractions and Dynamics in Experimental Tropical Ecosystems

POWRE：实验热带生态系统中的土壤有机质组分和动态

• 批准号: 9973314
• 负责人: Ann Russell
• 金额: $ 7.5万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-07-15 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9973314&HistoricalAwards=false
• 关键词: POWRE; Soil; Organic; Matter; Fractions

Russell 9973314Soil organic matter fractions and dynamics in experimental tropical ecosystems.Land degradation in the tropics translates into lower agricultural productivity and increased poverty at the local level. Loss of inherent soil fertility also has the potential to act at the global level to exacerbate climate change. The long-term goal of this research is to elucidate biological mechanisms that regulate the rejuvenation of soil fertility in degraded soils. The PI will investigate how and why soil organic matter dynamics are influenced by species composition and length of time between harvests in experimental forest plantations in Costa Rica. She will develop laboratory methods for characterizing soil organic matter dynamics and interpret the results using a process-based modeling approach. The broader objective is to increase our understanding of management impacts on key biological processes such that we can design more sustainable agroforestry systems.

Russell 9973314实验性热带生态系统中的土壤有机质组分和动态：热带地区的土地退化导致当地农业生产力下降和贫困加剧。 土壤固有肥力的丧失也有可能在全球一级加剧气候变化。 本研究的长期目标是阐明退化土壤肥力恢复的生物学机制。 PI将调查土壤有机质动态如何以及为什么受到物种组成和哥斯达黎加实验性森林种植园收获间隔时间的影响。 她将开发表征土壤有机质动态的实验室方法，并使用基于过程的建模方法解释结果。 更广泛的目标是增加我们对管理对关键生物过程的影响的理解，以便我们能够设计更可持续的农林系统。