Root effects on soil organic matter: a double-edged sword

根系对土壤有机质的影响：一把双刃剑

• 批准号: DP240101159
• 负责人: A/Prof Feike Dijkstra
• 金额: $ 51.81万
• 依托单位: The University of Sydney
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2024
• 资助国家: 澳大利亚
• 起止时间: 2024-01-01 至 2027-12-31
• 项目状态: 未结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP240101159
• 关键词: Root; effects; soil; organic; matter

This project aims to understand how plant roots build and destroy soil organic matter in grasslands and what the impacts are of drought. Soil organic matter is the largest terrestrial reservoir of nutrients for plant growth, but paradoxically, formation of new soil organic matter by plant roots also requires external nutrients. This project will address this apparent paradox by using a new root-centric framework and stable isotope techniques. The project will use state-of-the art computer models that incorporate the latest frameworks on soil organic matter interacting with plant roots. Benefits include an improved capacity to manage and predict grassland productivity and soil organic matter dynamics with greater resolution and accuracy.

该项目旨在了解植物根系如何构建和破坏草原土壤有机质以及干旱的影响。土壤有机质是植物生长最大的陆地养分库，但矛盾的是，植物根系形成新的土壤有机质也需要外部养分。该项目将通过使用新的以根为中心的框架和稳定同位素技术来解决这一明显的悖论。该项目将使用最先进的计算机模型，其中包含土壤有机物与植物根部相互作用的最新框架。好处包括提高管理和预测草地生产力和土壤有机质动态的能力，并具有更高的分辨率和准确性。