Divergent scaling of fine-root nitrogen and phosphorus in different root diameters, orders and functional categories: A meta-analysis

NWIPB OpenIR

	Divergent scaling of fine-root nitrogen and phosphorus in different root diameters, orders and functional categories: A meta-analysis
	Wang, Zhiqiang; Huang, Heng; Yao, Buqing; Deng, Jianming; Ma, Zeqing; Niklas, Karl J.
	2021
发表期刊	FOREST ECOLOGY AND MANAGEMENT
卷号	495
摘要	Fine-root nitrogen (N) and phosphorus (P) concentrations play an important role in driving ecological processes such as nutrient cycling in terrestrial ecosystems. Previous studies have demonstrated that the N versus P scaling relationship for fine roots (<2 mm in diameter) on average follows a 0.82-power law across plant functional groups and ecosystems. However, little is known about the N versus P scaling relationships for different fine-root classification groups (classes of diameters, branch orders, and functional categories, e.g., absorptive and transport roots). We used a dataset comprising 1037 N-P paired observations for a total of 227 woody species to explore N versus P scaling relationships in different fine-root groups. The overall means of fine-root N and P concentrations and N:P ratios across all of the woody species were 12.27 mg g-1, 1.01 mg g-1, and 15.14, respectively. N and P concentrations, N:P ratios, and the numerical values of the N versus P scaling exponents differed significantly within and across the different fine-root classes. The numerical values of absorptive roots N versus P scaling exponents varied within plant functional groups (e.g., life-form, phylogenetic and mycorrhizal groups). The numerical values of absorptive roots scaling exponents declined from 0.89 in boreal regions to 0.61 tropical regions. These results indicate that fine roots (<2 mm in diameter) should be carefully classified into different groups/categories when N and P scaling relationships need to be determined to predict plant growth and vegetation productivity. Our results shed important light on attempts to modeling fine-root biogeochemical processes in terrestrial ecosystems.
关键词	Fine roots Nitrogen Phosphorus Scaling exponents Scaling theory Woody species
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/60735
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Wang, Zhiqiang,Huang, Heng,Yao, Buqing,et al. Divergent scaling of fine-root nitrogen and phosphorus in different root diameters, orders and functional categories: A meta-analysis[J]. FOREST ECOLOGY AND MANAGEMENT,2021,495.
APA	Wang, Zhiqiang,Huang, Heng,Yao, Buqing,Deng, Jianming,Ma, Zeqing,&Niklas, Karl J..(2021).Divergent scaling of fine-root nitrogen and phosphorus in different root diameters, orders and functional categories: A meta-analysis.FOREST ECOLOGY AND MANAGEMENT,495.
MLA	Wang, Zhiqiang,et al."Divergent scaling of fine-root nitrogen and phosphorus in different root diameters, orders and functional categories: A meta-analysis".FOREST ECOLOGY AND MANAGEMENT 495(2021).