Precipitation and nitrogen addition enhance biomass allocation to aboveground in an alpine steppe

NWIPB OpenIR

	Precipitation and nitrogen addition enhance biomass allocation to aboveground in an alpine steppe
	Li, Changbin; Zheng, Zhi; Peng, Yunfeng; Nie, Xiuqing; Yang, Lucun; Xiao, Yuanming; Zhou, Guoying
	2019
发表期刊	ECOLOGY AND EVOLUTION
卷号	9 期号:21
摘要	There are two important allocation hypotheses in plant biomass allocation: allometric and isometric. We tested these two hypotheses in an alpine steppe using plant biomass allocation under nitrogen (N) addition and precipitation (Precip) changes at a community level. An in situ field manipulation experiment was conducted to examine the two hypotheses and the responses of the biomass to N addition (10 g N m(-2) y(-1)) and altered Precip (+/- 50% precipitation) in an alpine steppe on the Qinghai-Tibetan Plateau from 2013 to 2016. We found that the plant community biomass differed in its response to N addition and reduced Precip such that N addition significantly increased aboveground biomass (AGB), while reduced Precip significantly decreased AGB from 2014 to 2016. Moreover, reduced Precip enhanced deep soil belowground biomass (BGB). In the natural alpine steppe, the allocation between AGB and BGB was consistent with the isometric hypotheses. In contrast, N addition or altered Precip enhanced biomass allocation to aboveground, thus leading to allometric growth. More importantly, reduced Precip enhanced biomass allocation into deep soil. Our study provides insight into the responses of alpine steppes to global climate change by linking AGB and BGB allocation.
关键词	aboveground biomass belowground biomass nitrogen addition precipitation changes Tibetan alpine steppe
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/60504
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	Li, Changbin,Zheng, Zhi,Peng, Yunfeng,et al. Precipitation and nitrogen addition enhance biomass allocation to aboveground in an alpine steppe[J]. ECOLOGY AND EVOLUTION,2019,9(21).
APA	Li, Changbin.,Zheng, Zhi.,Peng, Yunfeng.,Nie, Xiuqing.,Yang, Lucun.,...&Zhou, Guoying.(2019).Precipitation and nitrogen addition enhance biomass allocation to aboveground in an alpine steppe.ECOLOGY AND EVOLUTION,9(21).
MLA	Li, Changbin,et al."Precipitation and nitrogen addition enhance biomass allocation to aboveground in an alpine steppe".ECOLOGY AND EVOLUTION 9.21(2019).