Higher carbon sequestration potential and stability for deep soil compared to surface soil regardless of nitrogen addition in a subtropical forest
文献类型：期刊论文
| 作者 | Liao, Chang1,3; Li, Dong1,2,3; Huang, Lin1,3; Yue, Pengyun1,3; Liu, Feng3; Tian, Qiuxiang3 |
| 刊名 | PEERJ
 |
| 出版日期 | 2020-05-11 |
| 卷号 | 8页码:21 |
| 关键词 | Nitrogen addition Soil depth Soil carbon fractions Soil carbon sequestration Soil carbon stability Net carbon sequestration |
| ISSN号 | 2167-8359 |
| DOI | 10.7717/peerj.9128 |
| 英文摘要 | Background. Labile carbon input could stimulate soil organic carbon (SOC) mineralization through priming effect, resulting in soil carbon (C) loss. Meanwhile, labile C could also be transformed by microorganisms in soil as the processes of new C sequestration and stabilization. Previous studies showed the magnitude of priming effect could be affected by soil depth and nitrogen (N). However, it remains unknown how the soil depth and N availability affect the amount and stability of the new sequestrated C, which complicates the prediction of C dynamics. Methods. A 20-day incubation experiment was conducted by adding C-13 labeled glucose and NH4NO3 to study the effects of soil depth and nitrogen addition on the net C sequestration. SOC was fractioned into seven fractions and grouped into three functional C pools to assess the stabilization of the new sequestrated C. Results. Our results showed that glucose addition caused positive priming in both soil depths, and N addition significantly reduced the priming effect. After 20 days of incubation, deep soil had a higher C sequestration potential (48% glucose-C) than surface soil (43% glucose-C). The C sequestration potential was not affected by N addition in both soil depths. Positive net C sequestration was observed with higher amount of retained glucose-C than that of stimulated mineralized SOC for both soil depths. The distribution of new sequestrated C in the seven fractions was significantly affected by soil depth, but not N addition. Compared to deep soil, the new C in surface soil was more distributed in the non-protected C pool (including water extracted organic C, light fraction and sand fraction) and less distributed in the clay fraction. These results suggested that the new C in deep soil was more stable than that in surface soil. Compared to the native SOC for both soil depths, the new sequestrated C was more distributed in non-protected C pool and less distributed in biochemically protected C pool (non-hydrolyzable silt and clay fractions). The higher carbon sequestration potential and stability in deep soil suggested that deep soil has a greater role on C sequestration in forest ecosystems. |
| 资助项目 | Natural Science Foundation of China[31870465] ; Natural Science Foundation of China[31600377] ; Natural Science Foundation of China[31700462] |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000531443800007 |
| 出版者 | PEERJ INC |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/15220]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Tian, Qiuxiang |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Tibet Univ, Coll Sci, Lasa, Peoples R China 3.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liao, Chang,Li, Dong,Huang, Lin,et al. Higher carbon sequestration potential and stability for deep soil compared to surface soil regardless of nitrogen addition in a subtropical forest[J]. PEERJ,2020,8:21. |
| APA | Liao, Chang,Li, Dong,Huang, Lin,Yue, Pengyun,Liu, Feng,&Tian, Qiuxiang.(2020).Higher carbon sequestration potential and stability for deep soil compared to surface soil regardless of nitrogen addition in a subtropical forest.PEERJ,8,21. |
| MLA | Liao, Chang,et al."Higher carbon sequestration potential and stability for deep soil compared to surface soil regardless of nitrogen addition in a subtropical forest".PEERJ 8(2020):21. |
入库方式： OAI收割
来源：武汉植物园
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