Increased n2o emissions during soil drying after waterlogging and spring thaw in a record wet year
文献类型：期刊论文
| 作者 | Chen, Zengming1,2; Ding, Weixin1; Xu, Yehong1,2; Mueller, Christoph3,4; Yu, Hongyan1; Fan, Jianling1 |
| 刊名 | Soil biology & biochemistry
 |
| 出版日期 | 2016-10-01 |
| 卷号 | 101页码:152-164 |
| 关键词 | Climate change Extreme rainfall Manure application Nitrous oxide Soil drying Spring thaw |
| ISSN号 | 0038-0717 |
| DOI | 10.1016/j.soilbio.2016.07.016 |
| 通讯作者 | Ding, weixin(wxding@issas.ac.cn) |
| 英文摘要 | Global climate change is expected to increase the frequency and intensity of extreme precipitation events, which can dramatically alter soil nitrous oxide (n2o) emissions. however, our ability to predict this effect is limited due to the lack of studies under real-world conditions. we conducted a field experiment in a maize-cultivated black soil in northeast china with six treatments: control without nitrogen (n) application (ck) and n-fertilized treatments with the ratio of urea n to manure n at 100:0 (npk), 75:25 (om1), 50:50 (om2), 25:75 (om3) and 0:100 (om4). the experimental year was the wettest on record with an extreme rainfall event of 178 mm occurring in summer 2013. annual n2o emissions from ck and npk were increased by 168% and 171%, respectively, relative to normal wet years. extreme rainfall saturated soils, resulted in low n2o fluxes (<20 mu g n m(-2) h(-1)) lasting for 25 d. however, n2o flux peaked (169-264 mu g n m(-2) h(-1)) in all treatments as the soil dried. total n2o emissions were 0.43 -0.74 kg n ha(-1) over the drying period, accounting for 47.5-51.2% of the annual budget. high n2o fluxes occurred when the ratio of soil nitrate (no3-) to dissolved organic carbon was 0.07-0.10 mg n mg(-1) c, not concentration was >3 mg n kg(-1) and water-filled pore space was 67-76%. distinctly higher n2o fluxes were also identified during the spring thaw period, accumulating to 20.1-49.4% of the non growing season emissions. emissions upon thawing were likely related to denitrification induced by high moisture conditions as a result of lag effect of the extreme rainfall. annual n2o emissions progressively reduced as the ratio, of urea n:manure n shifted towards manure, which was also the case during soil drying after waterlogging. total n2o emissions were reduced by 25.6% for om4 than npk. overall, our results suggest that soil n2o emissions were increased in the record wet year but a shift from urea towards manure with more n applied as starter n can minimize the n2o losses. (c) 2016 elsevier ltd. all rights reserved. |
| WOS关键词 | NITROUS-OXIDE EMISSIONS ; GREENHOUSE-GAS EMISSIONS ; CULTIVATED BLACK SOIL ; SEASONAL VARIABILITY ; CHEMICAL-COMPOSITION ; AGRICULTURAL SOILS ; NITRATE REDUCTION ; NORTHEAST CHINA ; GRASSLAND SOIL ; ORGANIC-CARBON |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000383300200017 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2376309 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Ding, Weixin |
| 作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Coll Dublin, Sch Biol & Environm Sci, Dublin 4, Ireland 4.Univ Giessen, Dept Plant Ecol, Heinrich Buff Ring 26, D-35392 Giessen, Germany |
| 推荐引用方式 GB/T 7714 | Chen, Zengming,Ding, Weixin,Xu, Yehong,et al. Increased n2o emissions during soil drying after waterlogging and spring thaw in a record wet year[J]. Soil biology & biochemistry,2016,101:152-164. |
| APA | Chen, Zengming,Ding, Weixin,Xu, Yehong,Mueller, Christoph,Yu, Hongyan,&Fan, Jianling.(2016).Increased n2o emissions during soil drying after waterlogging and spring thaw in a record wet year.Soil biology & biochemistry,101,152-164. |
| MLA | Chen, Zengming,et al."Increased n2o emissions during soil drying after waterlogging and spring thaw in a record wet year".Soil biology & biochemistry 101(2016):152-164. |
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来源：中国科学院大学
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