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| Effects of chemical fertilizer reduction and organic fertilizer use on the greenhouse gas emissions of early rice fields |
| Received:March 30, 2018 Revised:July 20, 2018 |
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| KeyWord:rice;organic fertilizers;greenhouse gases;yields;global warming potential |
| Author Name | Affiliation | E-mail | | YANG Dan | College of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China | | | YE Zhu-hong | College of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China | | | XIAO Xun | College of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China | | | YAN Ying | College of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China | | | LIU Ming-da | College of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China | mdsausoil@163.com | | XIE Gui-xian | College of Resources and Environment, Hunan Agriculture University, Changsha 410128, China | xieguixian@163.com |
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| Abstract: |
| This study determined the effects of the combined use of nitrogen fertilizer and organic manure on the greenhouse gas emissions, cumulative emissions, emission intensity (GHGI), and global warming potential (GWP)of early rice fields. The greenhouse gas produced through different treatments, including conventional chemical fertilizer and the combination of chemical fertilizer and organic manure[pig manure (PF), biogas slurry (BF), pig manure composting (DF), and green manure (GF)], was collected by closed static chamber method in the long-term fertilization experiment area. Results indicated that different treatments resulted in varying levels of greenhouse gas emissions. Compared with conventional chemical fertilizers, all treatments with organic manure increased CH4 and CO2 emissions in the early rice field, while N2O emissions decreased 7.09% and 4.89% in the PF and DF treatments, respectively. The addition of organic manure to the chemical fertilizer increased GWP between 5.00% and 59.58% and rice yield between 6.15%~12.10%. Choosing suitable organic fertilizer can also reduce the GHGI value of rice fields. This study reveal that, of the various treatments, DF is an especially effective method for increasing production and decreasing greenhouse gas emissions in early rice fields. |
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