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| Effects of controlled release fertilizer and nitrification inhibitor additions on nitrous oxide emissions from spring maize field in Northern China |
| Received:January 31, 2016 |
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| KeyWord:spring maize;nitrous oxide emission;controlled release fertilizer;nitrification inhibitor |
| Author Name | Affiliation | E-mail | | ZHU Yong-chang | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory for Agro-Environment, Ministry of Agriculture, Beijing 100081, China | | | LI Yu-e | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory for Agro-Environment, Ministry of Agriculture, Beijing 100081, China | | | QIN Xiao-bo | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory for Agro-Environment, Ministry of Agriculture, Beijing 100081, China | chinayrh@gmail.com | | DUAN Zhi-yuan | Fujian Institute of Meteorological Science, Fuzhou 350001, China | | | WAN Yun-fan | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory for Agro-Environment, Ministry of Agriculture, Beijing 100081, China | | | ZHOU Wei-ping | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory for Agro-Environment, Ministry of Agriculture, Beijing 100081, China | | | WANG Bin | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory for Agro-Environment, Ministry of Agriculture, Beijing 100081, China
Hainan Institute of Meteorological Science, Haikou 570203, China | | | HE Jia-nan | College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China | |
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| Abstract: |
| Soil is the main source of nitrous oxide (N2O) emissions. Fertilization critically influences soil N2O emissions. In this study, N2O fl uxes and grain yields were measured in a maize field applied with a controlled-release fertilizer or anitrification inhibitor. The experiment was conducted in Shanxi Province, China, during 2009-2012. Four different fertilization treatments (CK:no fertilizer, U:conventional urea, SCU:sulfur-coated urea, UDD:nitrification inhibitor) were designed. Automatic static chamber-gas chromatography method was used to measure N2O emissions. Environmental parameters and maize yields were also monitored simultaneously. Compared with urea, sulfur-coated urea and nitrification inhibitor reduced cumulative N2O emissions during the 4 growing seasons, with average reduction of 37.77% and 33.39%, respectively. The grain yields of SCU and UDD treatments increased by 16.04% and 6.35%, respectively, in comparison with the urea treatment. The N2O fluxes were significantly related with 5 cm soil temperature, 10 cm soil moisture and soil NH4+ content (P<0.01). There was no significant relationship between N2O fluxes and soil NO3- content. Most N2O emissions occurred at soil moisture >60% WFPS and soil temperature >20℃. Both sulfur-coated urea and nitrification inhibitor could mitigate N2O emissions and increase grain yields. These two fertilization could be applied in spring maize production. |
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