Response of soil nutrients and stoichiometry to elevated nitrogen deposition in alpine grassland on the Qinghai-Tibetan Plateau

NWIPB OpenIR

	Response of soil nutrients and stoichiometry to elevated nitrogen deposition in alpine grassland on the Qinghai-Tibetan Plateau
	Han Yuhui; Dong Shikui; Zhao Zhenzhen; Sha Wei; Li Shuai; Shen Hao; Xiao Jiannan; Zhang Jing; Wu Xiaoyu; Jiang Xiaoman; Zhao Jinbo; Liu Shiliang; Dong Quanmin; Zhou Huakun; Jane C. Yeomans
	2019
发表期刊	GEODERMA
卷号	343
摘要	Nitrogen deposition is notable in China, even in the high altitude region of Qinghai-Tibet Plateau (QTP). To identify the effects of nitrogen deposition on soil nutrient and ecological stoichiometry of the QTP's alpine grasslands, we treated three major types of grasslands (alpine meadow, alpine steppe, and cultivated grassland) with 6 different nitrogen addition levels: 0, 8, 24, 40, 56, 72 kg N ha(-1)yr(-1) through the years of 2015 to 2016. We sampled the soils at two depths, 0-10 and 10-20 cm in the peak-growing season (July) of each year. Results showed that: (i) soil total carbon and phosphorus are relatively stable under nitrogen deposition. (ii) Soil total nitrogen increases under low nitrogen addition rates while decreases under higher rates, and soil available nitrogen increases under nitrogen deposition in surface soil while decreasing in deeper soil. (iii) C:N, C:P, N:P had no significant difference between different nitrogen addition levels while there were significant differences between the two years under nitrogen addition. We speculate that nitrogen addition could alter soil nutrient conditions but there were certain limit of soil nutrient under N deposition.
关键词	Nitrogen addition Soil fertility Soil ecological stoichiometry Alpine grasslands Qinghai-Tibetan Plateau
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/59784
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	Han Yuhui,Dong Shikui,Zhao Zhenzhen,et al. Response of soil nutrients and stoichiometry to elevated nitrogen deposition in alpine grassland on the Qinghai-Tibetan Plateau[J]. GEODERMA,2019,343.
APA	Han Yuhui.,Dong Shikui.,Zhao Zhenzhen.,Sha Wei.,Li Shuai.,...&Jane C. Yeomans.(2019).Response of soil nutrients and stoichiometry to elevated nitrogen deposition in alpine grassland on the Qinghai-Tibetan Plateau.GEODERMA,343.
MLA	Han Yuhui,et al."Response of soil nutrients and stoichiometry to elevated nitrogen deposition in alpine grassland on the Qinghai-Tibetan Plateau".GEODERMA 343(2019).