Effect of grazing exclusion on the temperature sensitivity of soil net nitrogen mineralization in the Inner Mongolian grasslands

doi:10.1016/j.ejsobi.2020.103171

	Effect of grazing exclusion on the temperature sensitivity of soil net nitrogen mineralization in the Inner Mongolian grasslands
	Liu, Yuan 1; Wang, Changhui 2; Xu, Li ; He, Nianpeng 1,3
	2020
发表期刊	EUROPEAN JOURNAL OF SOIL BIOLOGY
ISSN	1164-5563
卷号	97
摘要	Grazing exclusion (GE) is an efficient management practice that prevents grassland degradation. The temperature sensitivity (Q(10)) of soil net nitrogen (N) mineralization (N-min) is an important parameter of N cycles, and it directly influences the feedback between the primary productivity of grassland ecosystems and climate warming. However, information remains limited about how GE affects the Q(10) of N-min in N-limited grasslands. In this study, we conducted a laboratory incubation experiment at six temperatures (-10, 0, 5, 15, 25, and 35 degrees C) and three soil moisture contents (15%, 25%, and 35%) for 35 days by using intact soil cores from three different GE periods grassland (0, 4 and 24 years). The results showed that long-term GE decreased the Q(10) of Nmin, which was highest in GE0 (2.62), followed by GE4 (2.36) and GE24 (2.42). In addition, Q(10) declined in 15% soil moisture content under all three GE treatments. Furthermore, activation energy (E-a) was negatively correlated with the substrate quality index (Q) in all three GE grasslands. These results support the carbon quality-temperature (CQT) hypothesis, showing that is can be applied to soil N mineralization in grasslands after long-term GE. This study demonstrated that GE potentially reduces the sensitivity of N-min to increasing temperature under global warming scenarios, which might help prevent N losses in these N-limited grasslands.
关键词	Grazing exclusion Soil net N mineralization Temperature sensitivity Activation energy CQT hypothesis
学科领域	Ecology ; Soil Science
DOI	10.1016/j.ejsobi.2020.103171
收录类别	SCI
语种	英语
WOS关键词	ORGANIC-MATTER DECOMPOSITION ; CARBON MINERALIZATION ; ALTITUDINAL GRADIENT ; LITTER QUALITY ; ALPINE MEADOW ; LOESS PLATEAU ; STEPPE ; LAND ; PATTERNS ; STORAGE
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
WOS记录号	WOS:000528019700007
出版者	ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
文献子类	Article
出版地	ISSY-LES-MOULINEAUX
EISSN	1778-3615
资助机构	National Key Research and Development Program of China [2017YFC0503904] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31870437, 31872690, 41573063]
作者邮箱	xuli@igsnrr.ac.cn
作品OA属性	hybrid
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/21795
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 4.Northeast Normal Univ, Key Lab Vegetat Ecol, Minist Educ, Changchun 130024, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yuan,Wang, Changhui,Xu, Li,et al. Effect of grazing exclusion on the temperature sensitivity of soil net nitrogen mineralization in the Inner Mongolian grasslands[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2020,97.
APA	Liu, Yuan,Wang, Changhui,Xu, Li,&He, Nianpeng.(2020).Effect of grazing exclusion on the temperature sensitivity of soil net nitrogen mineralization in the Inner Mongolian grasslands.EUROPEAN JOURNAL OF SOIL BIOLOGY,97.
MLA	Liu, Yuan,et al."Effect of grazing exclusion on the temperature sensitivity of soil net nitrogen mineralization in the Inner Mongolian grasslands".EUROPEAN JOURNAL OF SOIL BIOLOGY 97(2020).

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