Interannual Variation in Carbon Sequestration Depends Mainly on the Carbon Uptake Period in Two Croplands on the North China Plain
文献类型：SCI/SSCI论文
| 作者 | Bao X. Y. ; Wen X. F. ; Sun X. M. ; Zhao F. H. ; Wang Y. Y. |
| 发表日期 | 2014 |
| 关键词 | net ecosystem exchange greenhouse-gas emissions rain-fed maize water-use efficiency dioxide exchange deciduous forest eddy covariance growing-season winter-wheat flux measurements |
| 英文摘要 | Interannual variation in plant phenology can lead to major modifications in the interannual variation of net ecosystem production (NEP) and net biome production (NBP) as a result of recent climate change in croplands. Continuous measurements of carbon flux using the eddy covariance technique were conducted in two winter wheat and summer maize double-cropped croplands during 2003-2012 in Yucheng and during 2007-2012 in Luancheng on the North China Plain. Our results showed that the difference between the NEP and the NBP, i.e., the crop economic yield, was conservative even though the NEP and the NBP for both sites exhibited marked fluctuations during the years of observation. A significant and positive relationship was found between the annual carbon uptake period (CUP) and the NEP as well as the NBP. The NEP and the NBP would increase by 14.8 +/- 5.2 and 14.7 +/- 6.6 g C m(-2) 22 yr(-1), respectively, if one CUP-day was extended. A positive relationship also existed between the CUP and the NEP as well as the NBP for winter wheat and summer maize, respectively. The annual air temperature, through its negative effect on the start date of the CUP, determined the length of the CUP. The spring temperature was the main indirect factor controlling the annual carbon sequestration when a one-season crop (winter wheat) was considered. Thus, global warming can be expected to extend the length of the CUP and thus increase carbon sequestration in croplands. |
| 出处 | Plos One |
| 卷 | 9 |
| 期 | 10 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1932-6203 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/29973]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Bao X. Y.,Wen X. F.,Sun X. M.,et al. Interannual Variation in Carbon Sequestration Depends Mainly on the Carbon Uptake Period in Two Croplands on the North China Plain. 2014. |
入库方式： OAI收割
来源：地理科学与资源研究所
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