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	Testing the Growth Rate Hypothesis in Vascular Plants with Above- and Below-Ground Biomass
	Yu Q.
	2012
关键词	n-p stoichiometry biological stoichiometry leaf nitrogen phosphorus limitation nutrient limitation mineral-nutrition ratios ecosystems deposition rna
英文摘要	The growth rate hypothesis (GRH) proposes that higher growth rate (the rate of change in biomass per unit biomass, mu) is associated with higher P concentration and lower C: P and N:P ratios. However, the applicability of the GRH to vascular plants is not well-studied and few studies have been done on belowground biomass. Here we showed that, for aboveground, belowground and total biomass of three study species, mu was positively correlated with N: C under N limitation and positively correlated with P: C under P limitation. However, the N: P ratio was a unimodal function of mu, increasing for small values of mu, reaching a maximum, and then decreasing. The range of variations in mu was positively correlated with variation in C: N: P stoichiometry. Furthermore, mu and C: N: P ranges for aboveground biomass were negatively correlated with those for belowground. Our results confirm the well-known association of growth rate with tissue concentration of the limiting nutrient and provide empirical support for recent theoretical formulations.
出处	Plos One
卷	7
期	3
收录类别	SCI
语种	英语
ISSN号	1932-6203
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/26707]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yu Q.. Testing the Growth Rate Hypothesis in Vascular Plants with Above- and Below-Ground Biomass. 2012.

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