Collaborative Research: Soil Organic Matter in the Tropics: Determinants and Consequences

合作研究：热带土壤有机质：决定因素和后果

• 批准号: 9007881
• 负责人: William Parton
• 金额: $ 30万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-12-15 至 1994-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9007881&HistoricalAwards=false
• 关键词: Collaborative; Research; Soil; Organic; Matter

North Carolina State University's Tropical Soils Research Program and Colorado State University's Natural Resource Ecology Laboratory continue to investigate the determinants and consequences of soil organic matter (SOM) in the humid tropics. Main activities consist of 1) determining the relative effects of soil texture and clay mineralogy on total SOM content, 2) estimating the size of different SOM functional pools, 3) relating their N and P supplying capacity to texture and mineralogy, 4) determining the relative importance of physical protection, chemical recalcitrance and nutrient availability on the SOM pools, and 5) quantifying the effects of different land use practices on SOM pools. The CENTURY model will be modified for use in tropical conditions. The results will provide a deeper understanding of organic matter dynamics in soils with variable charge which will serve as a base for improved agricultural sustainability in the humic tropics and more realistic estimates of CO2 emissions to the atmosphere upon deforestation. This is an excellent research team that pioneered the development and calibration of the CENTURY model. The model has been used extensively for studying soil development. The facilities available for this research are excellent.

北卡罗来纳州立大学的热带土壤研究项目和科罗拉多州立大学的自然资源生态实验室继续研究潮湿热带地区土壤有机质 (SOM) 的决定因素和后果。主要活动包括 1) 确定土壤质地和粘土矿物学对 SOM 总含量的相对影响，2) 估计不同 SOM 功能库的大小，3) 将其氮和磷供应能力与质地和矿物学联系起来，4) 确定物理保护、化学不顺应性和养分可用性对 SOM 库的相对重要性，以及 5) 量化不同土地利用实践对 SOM 库的影响。 CENTURY 型号将进行修改，以便在热带条件下使用。 研究结果将提供对可变电荷土壤中有机物动态的更深入了解，这将成为改善腐殖质热带地区农业可持续性的基础，并更现实地估计森林砍伐后向大气中排放的二氧化碳。 这是一支优秀的研究团队，率先开发和校准了CENTURY模型。 该模型已广泛用于研究土壤发育。用于这项研究的设施非常好。