气候变化领域集成服务门户(CCPortal): Different fates and retention of deposited NH4+and NO3 in the alpine grasslands of the Qinghai-Tibet plateau

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DOI	10.1016/j.ecolind.2023.111415
	Different fates and retention of deposited NH4+and NO3 in the alpine grasslands of the Qinghai-Tibet plateau
	Xiang, Xuemei; De, Kejia; Lin, Weishan; Feng, Tingxu; Li, Fei; Wei, Xijie; Wang, Wei
发表日期	2024
ISSN	1470-160X
EISSN	1872-7034
卷号	158
英文摘要	The fate and redistribution of nitrogen in terrestrial ecosystems are of paramount significance to nitrogen cycling. Nevertheless, the destiny and content of nitrate (NO3-) and ammonium (NH4+) in grassland ecosystems in the context of atmospheric nitrogen deposition remain unclear. This study utilized field-based 15N tracing experiments to investigate the fate of NO3- and NH4+ in a high alpine meadow on the Tibetan Plateau over three growing seasons, elucidating the patterns of nitrogen allocation in plant stems, roots, and soil. The results indicate that: 1) NO3- and NH4+ exhibit distinct behaviors and distribution patterns in the high alpine grassland ecosystem, with significantly higher plant uptake capacity for NH4+ than for NO3-; 2) Nitrogen was primarily concentrated in the 0-15 cm soil layer during the first two growing seasons, shifting to the 15-30 cm soil layer in the third growing season; 3) Total nitrogen recovery decreased progressively from the first to the third growing season. In summary, with the progression of the growing season, the majority of nitrogen is retained in the soil, and the retained nitrogen is redistributed to aboveground and root components of plants through the soil, with plants exhibiting a preference for NH4+ uptake.
关键词	Qinghai-Tibet Plateau Alpine meadow Nitrogen deposition Recovery rate 15N tracer Nitrogen redistribution
英文关键词	N-15 TRACER; NITROGEN; SOIL; RESPONSES; NITRATE; FOREST; INPUTS
WOS研究方向	Biodiversity Conservation ; Environmental Sciences
WOS记录号	WOS:001137989300001
来源期刊	ECOLOGICAL INDICATORS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283130
作者单位	Qinghai University
推荐引用方式 GB/T 7714	Xiang, Xuemei,De, Kejia,Lin, Weishan,et al. Different fates and retention of deposited NH4+and NO3 in the alpine grasslands of the Qinghai-Tibet plateau[J],2024,158.
APA	Xiang, Xuemei.,De, Kejia.,Lin, Weishan.,Feng, Tingxu.,Li, Fei.,...&Wang, Wei.(2024).Different fates and retention of deposited NH4+and NO3 in the alpine grasslands of the Qinghai-Tibet plateau.ECOLOGICAL INDICATORS,158.
MLA	Xiang, Xuemei,et al."Different fates and retention of deposited NH4+and NO3 in the alpine grasslands of the Qinghai-Tibet plateau".ECOLOGICAL INDICATORS 158(2024).