Nitrogen application increases phytolith carbon sequestration in   degraded grasslands of North China

doi:10.1007/s11284-015-1320-0

CORC > 北京大学 > 城市与环境学院

	Nitrogen application increases phytolith carbon sequestration in degraded grasslands of North China
	Zhao, Yuying ; Song, Zhaoliang ; Xu, Xiaotian ; Liu, Hongyan ; Wu, Xiuchen ; Li, Zimin ; Guo, Fengshan ; Pan, Wenjie
刊名	ECOLOGICAL RESEARCH
	2016
关键词	Phytoliths Nitrogen application PhytOC Degraded grasslands Carbon sequestration INNER-MONGOLIA BIOGEOCHEMICAL SEQUESTRATION PRIMARY PRODUCTIVITY TEMPERATE STEPPE BIOGENIC SILICA CYCLES CO2 LIMITATION ECOSYSTEM IMPACT
DOI	10.1007/s11284-015-1320-0
英文摘要	Phytolith-occluded carbon (PhytOC) has significant potential for long-term biogeochemical carbon (C) sequestration because of its high resistance against decomposition. It may also play a crucial role in slowing the increase in global CO2 concentrations and mitigating climate warming. As phytolith C sequestration flux is usually correlated with phytolith content, C content of phytoliths and above-ground net primary productivity in plants, we hypothesize that application of fertilizers may increase phytolith C sequestration in some degraded grasslands. In this study, we conducted a field experiment to investigate the effects of external application of nitrogen (N) at six levels (0, 10, 20, 30, 40, and 50 g N m(-2) year(-1)) from 2011 to 2013 on the potential for phytolith C sequestration in degraded grasslands. Analysis showed that N application increased the PhytOC production flux in the extremely degraded grassland from 0.003 to 0.021 t CO2 ha(-1) year(-1) and the flux increased with the level of N fertilization peaking in the 20 g N m(-2) year(-1) treatment at 700 % of the control flux, but decreased at higher N doses. Assuming half of China's grasslands are fertilized with N to recover from degradation and the phytolith C sequestration flux of degraded grasslands amended with N is half of the 700 % increase, the potential of phytolith C sequestration in China's grasslands could be increased at least 60 %. This study demonstrates that optimization of nutritional supply is a promising approach to increase long-term phytolith C sequestration in degraded grasslands.; National Natural Science Foundation of China [41522207, 41130536]; Field Frontier Project of Institute of Geochemistry, Chinese Academy of Sciences [2045200295]; SCI(E); ARTICLE; songzhaoliang78@163.com; 1; 117-123; 31
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/439024]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Zhao, Yuying,Song, Zhaoliang,Xu, Xiaotian,et al. Nitrogen application increases phytolith carbon sequestration in degraded grasslands of North China[J]. ECOLOGICAL RESEARCH,2016.
APA	Zhao, Yuying.,Song, Zhaoliang.,Xu, Xiaotian.,Liu, Hongyan.,Wu, Xiuchen.,...&Pan, Wenjie.(2016).Nitrogen application increases phytolith carbon sequestration in degraded grasslands of North China.ECOLOGICAL RESEARCH.
MLA	Zhao, Yuying,et al."Nitrogen application increases phytolith carbon sequestration in degraded grasslands of North China".ECOLOGICAL RESEARCH (2016).