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题名: Effect of Grazing Intensity on Soil and Plant delta N-15 of an Alpine Meadow
作者: Du, Yangong1; Guo, Xiaowei1; Zhou, Geng2; Cao, Guangmin1; Li, Yikang1
刊名: POLISH JOURNAL OF ENVIRONMENTAL STUDIES
出版日期: 2017
卷号: 26, 期号:3, 页码:1071-1075
关键词: alpine meadow ; soil delta N-15 ; foliar delta N-15 ; grazing intensity
DOI: 10.15244/pjoes/67977
文章类型: Article
英文摘要: The mechanisms underlying the retention of inorganic N were still not well understood in an alpine meadow on the Tibetan Plateau as well as in other high-altitude meadow sites greatly grazed and disturbed. We conducted field soil and dominant species foliar nitrogen natural abundance of stable isotope ratios (delta N-15) under four grazing intensities. It was demonstrated that soil delta N-15 decreased significantly from 5.83 +/- 0.20% to 2.17 +/- 0.48% at 0-10 cm with the elevation of grazing intensity. Grazing reduced the degree of ecosystem N openness. The delta N-15 value of surface soil was mainly affected by soil total nitrogen. Furthermore, the degree of nitrogen limitation increased with grazing elevation for sedge family and Gramineae family plants.
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
关键词[WOS]: NATURAL N-15 ABUNDANCE ; NITROGEN-CYCLE ; INNER-MONGOLIA ; AVAILABILITY ; GRASSLANDS ; PATTERNS ; CARBON ; CHINA
收录类别: SCI
项目资助者: National Natural Science Foundation of China(31470530 ; Natural Science Foundation of Qinghai Province(2016-ZJ-918Q) ; Chinese Academy of Sciences ; 31200379)
语种: 英语
WOS记录号: WOS:000403567900012
Citation statistics:
内容类型: 期刊论文
URI标识: http://210.75.249.4/handle/363003/7017
Appears in Collections:中国科学院西北高原生物研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Bot, Xining 810008, Peoples R China
2.Bur Weihai Agr, Weihai 264200, Peoples R China
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