| 缓/控释尿素对稻田周年CH4和N2O排放的影响 |
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| 引用本文： | 郭 晨,徐正伟,王 斌,任 涛,万运帆,邹家龙,鲁剑巍,李小坤.缓/控释尿素对稻田周年CH4和N2O排放的影响[J].生态学杂志,2016,27(5):1489-1495. |
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| 作者姓名： | 郭 晨 徐正伟 王 斌 任 涛 万运帆 邹家龙 鲁剑巍 李小坤 |
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| 作者单位： | 1.华中农业大学资源与环境学院/农业部长江中下游耕地保育重点实验室, 武汉 430070; ;2.中国农业科学院农业环境与可持续发展研究所/农业部农业环境重点实验室, 北京 100081; ;3.湖北省荆州市荆州区土壤肥料工作站, 湖北荆州 434020 |
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| 基金项目： | 本文由公益性行业(农业)科研专项(201103039)和中央高校基本科研业务费专项(2662015PY135)资助 |
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| 摘 要： | 通过田间试验研究了不同缓/控释尿素对水稻产量和稻田周年温室气体排放的影响,评估生产单位质量水稻的温室气体排放量.结果表明: 优化施肥(OPT)处理在减氮(N)21.4%条件下产量与习惯施肥(FFP)处理持平,同时减少了稻田周年CH4和N2O的排放,其中水稻季CH4和N2O分别减排12.6%和12.5%,休闲季N2O减排33.3%.与OPT处理相比,控释尿素(CRU)处理在水稻季CH4减排28.9%,休闲季CH4零排放;硝化抑制剂(DMPP)处理在水稻季CH4和N2O分别减排41.6%和85.7%,休闲季CH4和N2O分别减排76.9%和6.5%.休闲季节N2O排放占周年N2O排放的76.8%～94.9%,是评价整个稻田温室气体排放不容忽视的因素.OPT、CRU和DMPP处理生产1.0 kg稻谷的温室气体排放强度分别为0.50、0.41和0.33 kg·kg-1,综合考虑周年的温室气体排放总量和产量,尿素和硝化抑制剂配合施用可以在保证水稻产量的情况下,减少温室气体的排放.
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| 关 键 词： | 周年温室气体排放 控释尿素 硝化抑制剂 稻田 |
| 收稿时间： | 2015-10-21 |
Effects of slow/controlled release urea on annual CH4 and N2O emissions in paddy field. |
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| GUO Chen,XU Zheng-wei,WANG Bin,REN Tao,WAN Yun-fan,ZOU Jia-long,LU Jian-wei,LI Xiao-kun.Effects of slow/controlled release urea on annual CH4 and N2O emissions in paddy field.[J].Chinese Journal of Ecology,2016,27(5):1489-1495. |
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| Authors: | GUO Chen XU Zheng-wei WANG Bin REN Tao WAN Yun-fan ZOU Jia-long LU Jian-wei LI Xiao-kun |
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| Institution: | 1.College of Resources and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtse River), Ministry of Agriculture, Wuhan 430070, China; ;2.Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory for Agro-Environment, Ministry of Agriculture, Beijing 100081, China; ;3.Soil and Fertilizer Station of Jingzhou City, Jingzhou 434020, Hubei, China |
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| Abstract: | Present study examined the influence of different types of slow/controlled release urea on rice yield and annual greenhouse gas emissions in a paddy field, and assessed the greenhouse gas intensity (GHGI, equivalent to global warming potential GWP/rice yield). The results indicated that the optimized fertilization (OPT) treatment recorded the similar yield with reduced nitrogen fertilizer (21.4%) supply compared with the farmers’ fertilizer practice (FFP) treatment, and decreased the annual emissions of CH4 (12.6%) and N2O (12.5%) during the rice season, and N2O emission (33.3%) during the fallow period. Application of controlled release urea (CRU) reduced CH4 emission by 28.9% during the rice-growing season with respect to OPT treatment, and showed negligible CH4 emission during the fallow season. However, nitrification inhibitor (DMPP) treatment was found to reduce the CH4 emissions by 41.6% and 76.9%, and N2O emissions by 85.7% and 6.5%, during the rice growing season and fallow season, respectively, compared with OPT treatment. In the fallow season, the N2O emissions accounted for 76.8%-94.9% of annual N2O emissions, which was clearly a key point for evaluation of greenhouse gas emissions in paddy. The average values of GHGI in OPT, CRU and DMPP treatments were 0.50, 0.41 and 0.33 kg·kg-1, respectively. Considering the benefits of higher rice yield and lower annual greenhouse gas emissions, combined application of urea and nitrification inhibitor could be the best combination in paddy fields. |
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| Keywords: | annual greenhouse gas emission controlled release urea nitrification inhibitor paddy field |
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