摘要
因化学功能的耦合和元素的不可替代性,植物对N、P的需求和利用存在严格的比例。植物N、P化学计量在不同功能群、生长地区、生长季、器官之间以及环境梯度下存在明显的变化规律。多数研究从N、P浓度、N:P及N、P间异速指数等角度分析了植物化学计量变化规律,并探讨其在全球范围内的具体数值。为增进对植物响应全球变化的理解,该文综述了N、P化学计量的影响因素及其机理的最新研究进展,并指出未来拟重点研究的方向。
Nitrogen （N）, phosphorus （P） and their stoichiometry play pivotal roles in plant structure and functions, development and ecological strategies in terrestrial ecosystems due to their coupling with each other and their irreplaceability. Plant N and P can be influenced by biotic and abiotic factors, such as individual traits, climate change and human disturbance, and it is those factors that determine the plant community composition and structure that finally affect the ecosystem processes. According to previous studies, there is an allometric relationship between N and P. Relationships between plant N and P depend on the soil nutrient condition and species plasticity in N and P. Understanding the relationships between plant N and P in major ecological gradients can further our knowledge about vegetation restoration, succession, biodiversity, ecosystem trophic structure and biogeochemical cycles. This information could help predict potential changes in terrestrial ecosystems in response to future climate change. We review recent advances in the influencing factors and mechanism of stoichiometry in order to improve understanding of plant responses to global change.
出处
《植物生态学报》
CAS
CSCD
北大核心
2012年第11期1205-1216,共12页
Chinese Journal of Plant Ecology
基金
国家自然科学基金项目(30730020)
"十二五"农村领域国家科技计划课题(2011AA100503)资助
关键词
异速关系
生态化学计量学
内稳态
N
P
植物功能群
allometric relationship, ecological stoichiometry, homeostasis, N：P, plant functional group
