Soil nitrous oxide emissions from a typical semiarid temperate steppe in inner Mongolia: effects of mineral nitrogen fertilizer levels and forms
文献类型：SCI/SSCI论文
| 作者 | Peng Q. |
| 发表日期 | 2011 |
| 关键词 | Nitrous oxide N level N form Emission factor Grassland greenhouse-gas emissions direct n2o emissions n fertilizer long-term nitrification inhibitor agricultural soils grassland soil paddy fields nitric-oxide fluxes |
| 英文摘要 | Nitrous oxide (N(2)O) emissions can be significantly affected by the amounts and forms of nitrogen (N) available in soils, but the effect is highly dependent on local climate and soil conditions in specific ecosystem. To improve our understanding of the response of N(2)O emissions to different N sources of fertilizer in a typical semiarid temperate steppe in Inner Mongolia, a 2-year field experiment was conducted to investigate the effects of high, medium and low N fertilizer levels (HN: 200 kg N ha(-1)y(-1), MN: 100 kg N ha(-1)y(-1), and LN: 50 kg N ha(-1)y(-1)) respectively and N fertilizer forms (CAN: calcium ammonium nitrate, AS: ammonium sulphate and NS: sodium nitrate) on N(2)O emissions using static closed chamber method. Our data showed that peak N(2)O fluxes induced by N treatments were concentrated in short periods (2 to 3 weeks) after fertilization in summer and in soil thawing periods in early spring; there were similarly low N(2)O fluxes from all treatments in the remaining seasons of the year. The three N levels increased annual N(2)O emissions significantly (P < 0.05) in the order of MN > HN > LN compared with the CK (control) treatment in year 1; in year 2, the elevation of annual N(2)O emissions was significant (P < 0.05) by HN and MN treatments but was insignificant by LN treatments (P > 0.05). The three N forms also had strong effects on N(2)O emissions. Significantly (P < 0.05) higher annual N(2)O emissions were observed in the soils of CAN and AS fertilizer treatments than in the soils of NS fertilizer treatments in both measured years, but the difference between CAN and AS was not significant (P > 0.05). Annual N(2)O emission factors (EF) ranged from 0.060 to 0.298% for different N fertilizer treatments in the two observed years, with an overall EF value of 0.125%. The EF values were by far less than the mean default EF proposed by the Intergovernmental Panel on Climate Change (IPCC). |
| 出处 | Plant and Soil |
| 卷 | 342 |
| 期 | 1-2 |
| 页 | 345-357 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0032-079X |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23209]  |
| 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 | Peng Q.. Soil nitrous oxide emissions from a typical semiarid temperate steppe in inner Mongolia: effects of mineral nitrogen fertilizer levels and forms. 2011. |
入库方式： OAI收割
来源：地理科学与资源研究所
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