Effects of elevated ozone on maize under varying soil nitrogen levels: Biomass, nitrogen and carbon, and their allocation to kernel
文献类型：期刊论文
| 作者 | Peng, Jinlong; Xu, Yansen ; Shang, Bo; Agathokleous, Evgenios; Feng, Zhaozhong
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2021-04-15 |
| 卷号 | 765页码:- |
| 关键词 | Crop production Air pollution Sensitivity Carbon:Nitrogen ratio Plant traits |
| ISSN号 | 0048-9697 |
| 英文摘要 | Effects of ozone (O-3) on maize have been increasingly studied, but only few studies have focused on the combined impacts of O-3 and nitrogen (N) on this important crop with C-4 carbon (C) fixation. In this study, a maize cultivar with the largest acreage in China was exposed to two O-3 treatments (NF: ambient air O-3 concentration; NF60: NF plus 60 ppb O-3) and four N levels (farmers' N practice: 240 kg N ha(-1) yr(-1); 150%, 50% and 25% of farmers' N practice). Generally, O-3 and N significantly influenced biomass, N and C, but did not change their allocation to kernel. There were significant interactions between O-3 and N in , C concentration and uptake, and leaf biomass and C uptake, with significant O-3 effects mainly occurring at N120 and N240. Based on the coefficient of determination (R-2), root C:N ratio rather than the most commonly used leaf C:N ratio was the best trait to indicate maize productivity. Furthermore, O-3 significantly increased the regression slopes between root C:N ratio and kernel N uptake, kernel C uptake and plant N uptake, strengthened the correlation of C:N ratio and kernel C uptake, and weakened the correlation of C:N ratio and hundred-kernels weight. These suggest that O-3 pollution can change the relationship of C:N ratio and productivity in maize. The weak correlation between kernel harvest index (HI) and N harvest index (NHI) indicated that future breeding researches should consider how to improve the coupling between biomass and N-related nutrition allocations in crop edible parts. Our results not only are helpful to accurately estimate O-3 impacts on maize with consideration of N but also provide a new insight into the relationship between plant traits and its productivity under O-3 pollution. (C) 2020 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45461]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 作者单位 | 1.Nanjing Univ Informat Sci & Technol, Key Lab Agrometeorol Jiangsu Prov, Sch Appl Meteorol, Nanjing 210044, Peoples R China 2.Chinese Acad Sci, State Key Lab Urban & Reg Ecol, Res Ctr Ecoenvironm Sci, Shuangqing Rd 18, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng, Jinlong,Xu, Yansen,Shang, Bo,et al. Effects of elevated ozone on maize under varying soil nitrogen levels: Biomass, nitrogen and carbon, and their allocation to kernel[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,765:-. |
| APA | Peng, Jinlong,Xu, Yansen,Shang, Bo,Agathokleous, Evgenios,&Feng, Zhaozhong.(2021).Effects of elevated ozone on maize under varying soil nitrogen levels: Biomass, nitrogen and carbon, and their allocation to kernel.SCIENCE OF THE TOTAL ENVIRONMENT,765,-. |
| MLA | Peng, Jinlong,et al."Effects of elevated ozone on maize under varying soil nitrogen levels: Biomass, nitrogen and carbon, and their allocation to kernel".SCIENCE OF THE TOTAL ENVIRONMENT 765(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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