Increasing temperature reduces the coupling between available nitrogen   and phosphorus in soils of Chinese grasslands

doi:10.1038/srep43524

CORC > 北京大学 > 城市与环境学院

	Increasing temperature reduces the coupling between available nitrogen and phosphorus in soils of Chinese grasslands
	Geng, Yan ; Baumann, Frank ; Song, Chao ; Zhang, Mi ; Shi, Yue ; Kuhn, Peter ; Scholten, Thomas ; He, Jin-Sheng
刊名	SCIENTIFIC REPORTS
	2017
关键词	N-P RATIOS TIBETAN PLATEAU TERRESTRIAL ECOSYSTEMS SEMIARID GRASSLAND ORGANIC-MATTER CLIMATE-CHANGE LEAF-N PLANT STOICHIOMETRY CARBON
DOI	10.1038/srep43524
英文摘要	Changes in climatic conditions along geographical gradients greatly affect soil nutrient cycling processes. Yet how climate regimes such as changes in temperature influence soil nitrogen (N) and phosphorus (P) concentrations and their stoichiometry is not well understood. This study investigated the spatial pattern and variability of soil N and P availability as well as their coupling relationships at two soil layers (0-10 and 10-20 cm) along a 4000-km climate transect in two grassland biomes of China, the Inner Mongolian temperate grasslands and the Tibetan alpine grasslands. Our results found that in both grasslands, from cold to warm sites the amounts of soil total N, total P and available P all decreased. By contrast, the amount of available N was positively related to mean annual temperature in the Tibetan grasslands. Meanwhile, with increasing temperature ratio of available N to P significantly increased but the linear relationship between them was considerably reduced. Thus, increasing temperature may not only induce a stoichiometric shift but also loose the coupling between available N and P. This N- P decoupling under warmer conditions was more evident in the Tibetan alpine grasslands where P limitation might become more widespread relative to N as temperatures continue to rise.; Natural Science Foundation of China [31630009, 31570394]; National Basic Research Program of China [2014CB954004]; SCI(E); ARTICLE; 7
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/474655]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Geng, Yan,Baumann, Frank,Song, Chao,et al. Increasing temperature reduces the coupling between available nitrogen and phosphorus in soils of Chinese grasslands[J]. SCIENTIFIC REPORTS,2017.
APA	Geng, Yan.,Baumann, Frank.,Song, Chao.,Zhang, Mi.,Shi, Yue.,...&He, Jin-Sheng.(2017).Increasing temperature reduces the coupling between available nitrogen and phosphorus in soils of Chinese grasslands.SCIENTIFIC REPORTS.
MLA	Geng, Yan,et al."Increasing temperature reduces the coupling between available nitrogen and phosphorus in soils of Chinese grasslands".SCIENTIFIC REPORTS (2017).