Shifts in soil organic carbon and nitrogen dynamics for afforestation in central China
文献类型：期刊论文
| 作者 | Dou, Xiaolin1,2; Xu, Xia3; Shu, Xiao1; Zhang, Quanfa1; Cheng, Xiaoli1 |
| 刊名 | ECOLOGICAL ENGINEERING
 |
| 出版日期 | 2016-02-01 |
| 卷号 | 87页码:263-270 |
| 关键词 | Afforestation delta C-13 Density fractionation delta N-15 Soil aggregates Soil organic matter |
| ISSN号 | 0925-8574 |
| DOI | 10.1016/j.ecoleng.2015.11.052 |
| 英文摘要 | The afforestation has been proposed as a primary means of sequestering carbon (C) from the atmosphere, thereby mitigating climate change. However, consequences of afforestation on soil organic C and nitrogen (N) dynamics due to spatial heterogeneity are not fully understood. The objectives of this study were to identify the consequences of 18 years of afforestation on C and N dynamics in the Danjiangkou Reservoir area of central China. Soil samples from the woodland, shrubland, cropland and adjacent open area soils (i.e. the control) were separated into four aggregate sizes (>2000 mu m, 250-2000 mu m, 53-250 mu m and <53 mu m), and three density fractions [free light fraction (LF), intra-aggregate particulate organic matter (iPOM) and mineral-associated organic matter (mSOM)]. All fractions were analyzed for their C and N content, and delta C-13 and delta N-15 values. Afforestation enhanced the soil C and N storage, primarily due to increases in soil C and N storage of macroaggregates (>2000 mu m) with the largest (65-87%) fraction in iPOM. The C: N ratios generally increased from the cropland to shrubland to woodland across all fractions. The C-13 values indicated that the fastest decay rates (k = 0.024 yr(-1)) in LF of macroaggregates (>2000 mu m) was in woodland, but the fastest decay rates (0.114-0.137 yr(-1)) in iPOM of all aggregates were observed in cropland. Meanwhile, the most enriched delta N-15 values (0.87-3.81) were found in cropland soil. Our results suggest that afforestation could alter weight distribution of soil fractions and increase the soil organic C and N storage, thereby affecting the turnover and stability of SOM. (C) 2015 Elsevier B.V. All rights reserved. |
| 资助项目 | National Natural Science Foundation of China[31270550] ; National Natural Science Foundation of China[31470557] ; National Natural Science Foundation of China[31130010] ; National Key Technology Research and Development Program[2011BAD31B02] ; "Strategic Priority Research Program-Climate Change: Carbon Budget and Relevant Issues" of the Chinese Academy of Sciences[XDA05060500] |
| WOS研究方向 | Environmental Sciences & Ecology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000368899800033 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/128]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Cheng, Xiaoli |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Peoples R China 2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100193, Peoples R China 3.Univ Oklahoma, Dept Bot & Microbiol, 770 Van Vleet Oval, Norman, OK 73019 USA |
| 推荐引用方式 GB/T 7714 | Dou, Xiaolin,Xu, Xia,Shu, Xiao,et al. Shifts in soil organic carbon and nitrogen dynamics for afforestation in central China[J]. ECOLOGICAL ENGINEERING,2016,87:263-270. |
| APA | Dou, Xiaolin,Xu, Xia,Shu, Xiao,Zhang, Quanfa,&Cheng, Xiaoli.(2016).Shifts in soil organic carbon and nitrogen dynamics for afforestation in central China.ECOLOGICAL ENGINEERING,87,263-270. |
| MLA | Dou, Xiaolin,et al."Shifts in soil organic carbon and nitrogen dynamics for afforestation in central China".ECOLOGICAL ENGINEERING 87(2016):263-270. |
入库方式： OAI收割
来源：武汉植物园
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