干旱区生态环境知识资源中心(Arid): Variation in carbon, nitrogen and phosphorus partitioning between above- and belowground biomass along a precipitation gradient at Tibetan Plateau

Arid

	Variation in carbon, nitrogen and phosphorus partitioning between above- and belowground biomass along a precipitation gradient at Tibetan Plateau
	Hong Jiangtao; Wang Xiaodan; Wu Jianbo
来源期刊	Journal of Mountain Science
ISSN	1672-6316
出版年	2016
卷号	13 期号:4 页码:661-671
英文摘要	Precipitation is a potential factor that significantly affects plant nutrient pools by influencing biomass sizes and nutrient concentrations. However, few studies have explicitly dissected carbon (C), nitrogen (N) and phosphorus (P) pools between above- and belowground biomass at the community level along a precipitation gradient. We conducted a transect (approx. 1300 km long) study of Stipa purpurea community in alpine steppe on the Tibet Plateau of China to test the variation of N pool of aboveground biomass/N pool of belowground biomass (AB/BB N) and P pool of aboveground biomass/P pool of belowground biomass (AB/BB P) along a precipitation gradient. The proportion of aboveground biomass decreased significantly from mesic to drier sites. Along the belt transect, the plant N concentration was relatively stable; thus, AB/BB N increased with moisture due to the major influences by above- and belowground biomass allocation. However, P concentration of aboveground biomass decreased significantly with increasing precipitation and AB/BB P did not vary with aridity because of the offset effect of the P concentration and biomass allocation. Precipitation gradients do decouple the N and P pool of a S. purpurea community along a precipitation gradient in alpine steppe. The decreasing of N:P in aboveground biomass in drier regions may indicate much stronger N limitation in more arid area.
英文关键词	Biomass allocation Nutrient concentration Qinghai-Tibetan Plateau Alpine steppe Stipa purpurea
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5668324
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335626
作者单位	Hong Jiangtao, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China.; Wang Xiaodan, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China.; Wu Jianbo, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China.
推荐引用方式 GB/T 7714	Hong Jiangtao,Wang Xiaodan,Wu Jianbo. Variation in carbon, nitrogen and phosphorus partitioning between above- and belowground biomass along a precipitation gradient at Tibetan Plateau[J],2016,13(4):661-671.
APA	Hong Jiangtao,Wang Xiaodan,&Wu Jianbo.(2016).Variation in carbon, nitrogen and phosphorus partitioning between above- and belowground biomass along a precipitation gradient at Tibetan Plateau.Journal of Mountain Science,13(4),661-671.
MLA	Hong Jiangtao,et al."Variation in carbon, nitrogen and phosphorus partitioning between above- and belowground biomass along a precipitation gradient at Tibetan Plateau".Journal of Mountain Science 13.4(2016):661-671.