气候变化领域集成服务门户(CCPortal): Nitrous oxide emissions from different land uses affected by managements on the Qinghai-Tibetan Plateau

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DOI	10.1016/j.agrformet.2017.06.013
	Nitrous oxide emissions from different land uses affected by managements on the Qinghai-Tibetan Plateau
	Zhang, Zhenhua; Zhu, Xiaoxue; Wang, Shiping; Duan, Jichuang; Chang, Xiaofeng; Luo, Caiyun; He, Jin-Sheng; Wilkes, Andreas
通讯作者	Wang, SP (通讯作者)
发表日期	2017
ISSN	0168-1923
EISSN	1873-2240
起始页码	133
结束页码	141
卷号	246
英文摘要	We evaluated the N2O emissions from four land use types (a native alpine meadow with winter grazing (NAM), an abandoned pasture (APL), a perennial Elymus nutans Griseb. pasture (PEN) and an annual Avena saliva L. pasture (AAS)) with and without three management practices (nitrogen (N) fertilizer, sheep manure and no tillage (NT)) in a Gelic Cambisol soil underlying an alpine meadow on the Qinghai-Tibetan Plateau in 2009 and 2010. Our results show that, compared with NAM, APL had significantly higher cumulative-average seasonal N2O emissions. Converting unmanaged APL to PEN or AAS significantly increased cumulative-average seasonal N2O emissions by 35% and 75%, respectively. Sheep manure and N fertilizer application significantly increased N2O emissions due to increased soil inorganic N concentration. The effect of sheep manure addition on N2O emissions was lower than that of N fertilizer. For AAS, tillage significantly decreased the effect of sheep manure application on N2O emissions. Compared with tillage, NT significantly decreased N2O emissions from AAS. Therefore, our results suggest that cultivating natural grassland would increase N2O emissions, and fertilizer application would amplify the magnitude of emissions, whereas NT could mitigate the fertilizer impact on N2O emission. Furthermore, the structural equation analysis revealed that land use change affected N2O emissions directly by influencing the number of plant species and soil characteristics. There were two different underlying mechanisms regulating N2O emissions in response to N fertilizer and sheep manure addition.
关键词	GREENHOUSE-GAS EMISSIONS ALPINE MEADOW N2O EMISSIONS TILLAGE SYSTEMS CARBON-DIOXIDE NO-TILL SOIL GRASSLAND ECOSYSTEM CLIMATE
英文关键词	Land use change; Nitrogen fertilization; Conventional tillage; Nitrous oxide emissions
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000408782000013
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
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/259067
推荐引用方式 GB/T 7714	Zhang, Zhenhua,Zhu, Xiaoxue,Wang, Shiping,et al. Nitrous oxide emissions from different land uses affected by managements on the Qinghai-Tibetan Plateau[J]. 中国科学院青藏高原研究所,2017,246.
APA	Zhang, Zhenhua.,Zhu, Xiaoxue.,Wang, Shiping.,Duan, Jichuang.,Chang, Xiaofeng.,...&Wilkes, Andreas.(2017).Nitrous oxide emissions from different land uses affected by managements on the Qinghai-Tibetan Plateau.AGRICULTURAL AND FOREST METEOROLOGY,246.
MLA	Zhang, Zhenhua,et al."Nitrous oxide emissions from different land uses affected by managements on the Qinghai-Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 246(2017).