Different effects of single versus repeated additions of glucose on the soil organic carbon turnover in a temperate forest receiving long-term N addition
文献类型：期刊论文
| 作者 | Wang, Qingkui2,3; Chen, Longchi2,3; Yang, Qingpeng2,3; Sun, Tao2; Li, Changmeng1 |
| 刊名 | GEODERMA
 |
| 出版日期 | 2019-05-01 |
| 卷号 | 341页码:59-67 |
| 关键词 | Soil organic matter decomposition Priming effect Nitrogen deposition Labile organic carbon input Carbon balance |
| ISSN号 | 0016-7061 |
| DOI | 10.1016/j.geoderma.2019.01.032 |
| 英文摘要 | Labile organic C inputs from litter decomposition and root turnover may stimulate soil organic carbon (SOC) decomposition by a priming effect that strongly influences SOC dynamics. The direction and magnitude of this priming effect depends on the type and pattern of N and C addition. However, in which manner the type and pattern of N and C addition affect priming effect remains poorly understood. Thus, we conducted 90-day incubation to evaluate the effects of single and repeated addition of C-13-labeled glucose on SOC decomposition to soils collected from a long-term simulated N experiment with inorganic or organic N addition as the rate of 100 kg N hm(-2) yr(-1) as solution form. Respired CO2 and its delta C-13 value were measured to calculate the added glucose and native SOC decomposition, and consequently quantify primed C, and net C balance between primed SOC and retained glucose-C. We revealed for the first time that long-term N addition significantly decreased the cumulative primed C by an average of 23.0%, but this decrease was greater under organic N (29.7%) than under inorganic N (16.3%). Therefore, the suppression effects of atmospheric N deposition on primed C may be underestimated by solely adding inorganic N. The amount of cumulative primed C induced by single glucose addition was 2.92 times as high as that induced by repeated glucose addition. This finding suggests that the single addition with a high amount of labile organic C may overestimate primed C that naturally occurs in the field. A combined effect of glucose addition patterns and N addition on primed C was also observed. After the 90 day incubation, the amount of added glucose-C that remained in soils was substantially higher than the SOC loss due to positive priming effect, resulting in a net C increase. Taken together all data, we conclude that the repeated addition of labile organic C to soils under increasing atmospheric N deposition can increase SOC sequestration and stocks despite the positive priming effects in temperate forests. |
| 资助项目 | National Natural Science Foundation of China[31830015] ; National Natural Science Foundation of China[31570466] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB15010301] ; National Key Research and Development Program of China[2016YFA0600801] ; Department of Science and Technology of Hunan Province, China[2017TP1040] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000459520100007 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://210.72.129.5/handle/321005/123921]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Wang, Qingkui |
| 作者单位 | 1.Nuluerhushan Natl Nat Reserve Adm, Chaoyang 122000, Peoples R China 2.Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110016, Liaoning, Peoples R China 3.Chinese Acad Sci, Huitong Expt Stn Forest Ecol, Huitong 418307, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Qingkui,Chen, Longchi,Yang, Qingpeng,et al. Different effects of single versus repeated additions of glucose on the soil organic carbon turnover in a temperate forest receiving long-term N addition[J]. GEODERMA,2019,341:59-67. |
| APA | Wang, Qingkui,Chen, Longchi,Yang, Qingpeng,Sun, Tao,&Li, Changmeng.(2019).Different effects of single versus repeated additions of glucose on the soil organic carbon turnover in a temperate forest receiving long-term N addition.GEODERMA,341,59-67. |
| MLA | Wang, Qingkui,et al."Different effects of single versus repeated additions of glucose on the soil organic carbon turnover in a temperate forest receiving long-term N addition".GEODERMA 341(2019):59-67. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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