气候变化领域集成服务门户(CCPortal): Effects of land use and nitrogen fertilizer on ecosystem respiration in alpine meadow on the Tibetan Plateau

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DOI	10.1007/s11368-016-1612-1
	Effects of land use and nitrogen fertilizer on ecosystem respiration in alpine meadow on the Tibetan Plateau
	Luo, Caiyun; Wang, Shiping; Zhao, Liang; Xu, Shixiao; Xu, Burenbayin; Zhang, Zhenhua; Yao, Buqing; Zhao, Xinquan
通讯作者	Wang, SP (通讯作者)
发表日期	2017
ISSN	1439-0108
EISSN	1614-7480
起始页码	1626
结束页码	1634
卷号	17 期号:6
英文摘要	There is still great uncertainty about the response of global carbon dynamics to land use change and nitrogen (N) fertilizer, especially how to balance between forage production and CO2 emission under land use change and N fertilizer times in alpine meadows. This objective of this study was to determine the effects of three land uses (i.e., abandoned cropland/pastureland (APL), perennial Elymus nutans (PEN), and annual Avena sativa L. pasture (AO)) and nitrogen fertilizer applied three times a year with the same N dose on aboveground net primary productivity (ANPP) and ecosystem respiration (Re) from 2011 to 2013. We found that AO had the highest average ANPP and lowest average Re compared with APL and PEN and that there were no significant differences for them between APL and PEN during the experimental period. Nitrogen fertilization did not significantly affect ANPP, root biomass, and seasonal mean Re. Soil temperature could explain about 21.1 and 13-15% of the variation in daily Re for APL and PEN, respectively, but 20.7 and 15.0% of the variation in daily Re for APL and PEN under both with and without N fertilization, respectively. ANPP explained about 49.4% of the variation in seasonal average Re for AO, and the ratio of root biomass and ANPP explained about 45% of the variation in seasonal average Re for AO-N treatment during 2011-2013. Land use significantly affected ANPP, root biomass, and seasonal mean Re. However, nitrogen addition with different times did not significantly affect seasonal average Re or ANPP and root biomass for all treatments during the experimental period. Therefore, our results suggested that N could not be a limiting factor for plant production in this alpine region.
关键词	SOIL CO2 EFFLUX CLIMATE-CHANGE SUBTROPICAL CHINA TERRESTRIAL ECOSYSTEMS CARBON SEQUESTRATION GURBANTUNGGUT DESERT NORTHWESTERN CHINA LIMITATION AVAILABILITY DEPOSITION
英文关键词	Alpine meadow; Land use change; Nitrogen fertilization; Ecosystem respiration; Plant production; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
WOS类目	Environmental Sciences ; Soil Science
WOS记录号	WOS:000401436200010
来源期刊	JOURNAL OF SOILS AND SEDIMENTS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258884
推荐引用方式 GB/T 7714	Luo, Caiyun,Wang, Shiping,Zhao, Liang,et al. Effects of land use and nitrogen fertilizer on ecosystem respiration in alpine meadow on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2017,17(6).
APA	Luo, Caiyun.,Wang, Shiping.,Zhao, Liang.,Xu, Shixiao.,Xu, Burenbayin.,...&Zhao, Xinquan.(2017).Effects of land use and nitrogen fertilizer on ecosystem respiration in alpine meadow on the Tibetan Plateau.JOURNAL OF SOILS AND SEDIMENTS,17(6).
MLA	Luo, Caiyun,et al."Effects of land use and nitrogen fertilizer on ecosystem respiration in alpine meadow on the Tibetan Plateau".JOURNAL OF SOILS AND SEDIMENTS 17.6(2017).