Effect of grazing exclusion on the temperature sensitivity of soil net nitrogen mineralization in the Inner Mongolian grasslands | |
Liu, Yuan1,2; Wang, Changhui3; Xu, Li1; He, Nianpeng1,2,4 | |
刊名 | EUROPEAN JOURNAL OF SOIL BIOLOGY |
2020-03-01 | |
卷号 | 97页码:7 |
关键词 | Grazing exclusion Soil net N mineralization Temperature sensitivity Activation energy CQT hypothesis |
ISSN号 | 1164-5563 |
DOI | 10.1016/j.ejsobi.2020.103171 |
通讯作者 | Xu, Li(xuli@igsnrr.ac.cn) |
英文摘要 | 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. |
资助项目 | National Key Research and Development Program of China[2017YFC0503904] ; National Natural Science Foundation of China[31870437] ; National Natural Science Foundation of China[31872690] ; National Natural Science Foundation of China[41573063] |
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 |
语种 | 英语 |
出版者 | ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER |
WOS记录号 | WOS:000528019700007 |
资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://ir.igsnrr.ac.cn/handle/311030/159830] |
专题 | 中国科学院地理科学与资源研究所 |
通讯作者 | Xu, Li |
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,2020,97:7. |
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,97,7. |
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):7. |
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