| Asymmetric responses of autotrophic and heterotrophic respiration to simulated nitrogen deposition in a subalpine grassland | |
Jiang, Yuan1,2,3,4; Li, WB(李伟斌)1,2,3,4,5 ; Gan, Xiaoling1,2,3,4; Ye, Xiaoshuang1,2,3,4; Jiang, Yanjing1,2,3,4; Zhao, CY(赵传燕)1,2,3,4 | |
| 2024-07 | |
| Source Publication | APPLIED SOIL ECOLOGY Impact Factor & Quartile Of Published Year The Latest Impact Factor & Quartile |
| ISSN | 0929-1393 |
| EISSN | 1873-0272 |
| Volume | 199 |
| page numbers | 11 |
| Abstract | The increasing anthropogenic nitrogen (N) input is expected to affect soil total respiration (Rs), whereas the mechanisms of Rs components (autotrophic respiration, Ra; heterotrophic respiration, Rh) in response to aggravated N input remains controversial, especially in the subalpine ecosystems. A multi-level simulated N deposition experiment was designed at a subalpine grassland to explore the effects of Rs components in response to N deposition and their potential mechanisms. Results showed that both Ra and Rs firstly increased and subsequently decreased at a threshold of ca. 5 g N m(-2) yr(-1), with the maximum of Ra and Rs increased by 22.98 % and 13.93 %, respectively. By comparison, Rh decreased along with N addition duration (year) at ca. 15 g N m(-2) yr(-1). Similarly, growing season average cumulative Ra and Rs also showed a bell-shaped mode in response to elevated N inputs, with a peak appearing at ca. 5 g N m(-2) yr(-1). Increased Ra with N addition rates enhanced the Ra/Rs ratio in the fourth experimental year only. The temperature sensitivity (Q(10)) of Ra, Rh and Rs spanned from 1.86 to 2.58, 1.85 to 2.31 and 1.86 to 2.45 respectively. Additionally, N addition reduced the Q(10) of Ra, Rh and Rs at ca. 10 g N m(-2) yr(-1), ca. 15 g N m(-2) yr(-1) and ca. 10 g N m(-2) yr(-1), respectively. The changes in Ra and Rh were largely affected by root TN and soil C/N, respectively. Our results address that Ra exerts a leading role in regulating Rs and Ra/Rs ratio with N enrichment. These findings supply a relatively comprehensive insight of N-induced effects on soil respirations (Ra and Rh) and their potential mechanisms, which have an important implication for evaluating soil C emission in the subalpine ecosystems under aggravating N deposition. |
| Keyword | Autotrophic respiration Heterotrophic respiration Nitrogen addition Soil respiration Subalpine grassland |
| Publisher | ELSEVIER |
| DOI | 10.1016/j.apsoil.2024.105393 |
| Indexed By | SCIE |
| Language | 英语 |
| WOS Research Area | Agriculture |
| WOS Subject | Soil Science |
| WOS ID | WOS:001227030200001 |
| Original Document Type | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.lzu.edu.cn/handle/262010/592469 |
| Collection | 兰州大学 草地农业科技学院 |
| Affiliation | 1.Minist Agr & Rural Affairs, State Key Lab Herbage Improvement & Grassland Agro, Key Lab Grassland Livestock Ind Innovat, Lanzhou 730020, Peoples R China; 2.Minist Educ, Engn Res Ctr Grassland Ind, Lanzhou 730020, Peoples R China; 3.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou 730020, Peoples R China; 4.Observat Stn Subalpine Ecol Syst Middle Qilian Mt, Zhangye 734000, Peoples R China; 5.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Minist Agr & Rural Affairs, Key Lab Grassland Livestock Ind Innovat,State Key, Lanzhou 730020, Peoples R China |
| First Author Affilication | College of Pastoral Agriculture Science and Technology |
| Recommended Citation GB/T 7714 | Jiang, Yuan,Li, Weibin,Gan, Xiaoling,et al. Asymmetric responses of autotrophic and heterotrophic respiration to simulated nitrogen deposition in a subalpine grassland[J]. APPLIED SOIL ECOLOGY,2024,199. |
| APA | Jiang, Yuan,Li, Weibin,Gan, Xiaoling,Ye, Xiaoshuang,Jiang, Yanjing,&Zhao, Chuanyan.(2024).Asymmetric responses of autotrophic and heterotrophic respiration to simulated nitrogen deposition in a subalpine grassland.APPLIED SOIL ECOLOGY,199. |
| MLA | Jiang, Yuan,et al."Asymmetric responses of autotrophic and heterotrophic respiration to simulated nitrogen deposition in a subalpine grassland".APPLIED SOIL ECOLOGY 199(2024). |
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