Uptake dynamics of inorganic and organic nitrogen in forest plants

森林植物无机氮和有机氮的吸收动态

• 批准号: 105590-2008
• 负责人: Hawkins, Barbara
• 金额: $ 1.91万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=496588
• 关键词: Uptake; dynamics; inorganic; organic; nitrogen

Lack of available nitrogen (N) limits plant growth in most Canadian forests. Many woody plants are well adapted to tolerate low-N soils having slow growth rates, long-lived tissues, low nutrient concentrations and low rates of nutrient loss. In addition, most woody plant roots are associated with mycorrhizal fungi which assist in nutrient acquisition. Many forest plants can take up N in organic and inorganic forms which raises the possibility of niche partitioning where species are adapted to take up and use particular N forms. My lab seeks to understand the physiological mechanisms of adaptation and acclimation to N form and availability. With this information we can evaluate root competitive strength and response in forest plants which, in turn, influence species diversity, primary productivity and community stability.

缺乏有效氮（N）限制了大多数加拿大森林的植物生长。 许多木本植物很好地适应了低氮土壤，具有生长速度慢，组织寿命长，养分浓度低和养分损失率低。此外，大多数木本植物的根与菌根真菌有关，有助于养分的获取。 许多森林植物可以吸收有机和无机形式的N，这提高了生态位划分的可能性，其中物种适应于吸收和使用特定的N形式。 我的实验室旨在了解适应和驯化的生理机制，以N的形式和可用性。 有了这些信息，我们可以评估根系竞争强度和森林植物的反应，反过来，影响物种多样性，初级生产力和群落稳定性。