Will trees get enough nitrogen to sustain productivity in elevated CO2?

树木能否获得足够的氮来维持二氧化碳浓度升高的生产力？

• 批准号: DP160102452
• 负责人: Prof David Ellsworth
• 金额: $ 24.93万
• 依托单位: Western Sydney University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2016
• 资助国家: 澳大利亚
• 起止时间: 2016-06-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP160102452
• 关键词: Will; trees; get; enough; nitrogen

The project proposes to explore how tissue nitrogen declines in future elevated carbon dioxide (eCO2) by studying the availability of soil nitrogen to plants and use of nitrogen by Eucalyptus woodland trees. Plant canopy nitrogen concentrations decline in nearly every large-scale eCO2 study done on native soils. The project plans to explore how changes in ecosystem nitrogen balance occur, by investigating if leaf nitrogen declines under eCO2 due to the balance of plant activity versus changes in soil nitrogen availability. The outcomes are central to knowing the extent to which extra nitrogen ‘feeds’ the eCO2 fertilisation response and sustains long-term increases in productivity. Expected outcomes may support the development of management options to sustain future forest productivity.

该项目拟通过研究土壤氮对植物的可用性以及桉树林地树木对氮的利用，探索在未来二氧化碳 (eCO2) 升高的情况下组织氮如何下降。该项目计划通过调查在二氧化碳排放下叶片氮是否因植物活动与土壤氮可用性变化的平衡而下降，从而探索生态系统氮平衡的变化是如何发生的。结果对于了解额外氮的程度至关重要。 “喂养”eCO2 施肥反应并维持生产力的长期增长。预期结果可能支持制定维持未来森林生产力的管理方案。