Effects of Nitrogen Fertilizer Management on CH 4 and N 2 O Emissions in Paddy Field

Methane (CH ) and nitrous oxide (N O) are two extremely important greenhouse gases in the atmosphere. Nitrogen fertilizer is an important factor affecting CH and N O emissions in rice fields. Rational application of nitrogen fertilizer can not only promote high yields of rice but also reduce greenho...

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Bibliographic Details
Published inHuanjing kexue Vol. 43; no. 4; p. 2171
Main Authors Zheng, Mei-Qun, Liu, Juan, Jiang, Pei-Kun, Wu, Jia-Sen, Li, Yong-Fu, Li, Song-Hao
Format Journal Article
LanguageChinese
Published China 08.04.2022
Subjects
Agriculture - methods
Fertilizers - analysis
Greenhouse Gases - analysis
Methane - analysis
Nitrogen - analysis
Nitrous Oxide - analysis
Oryza
Soil - chemistry
rice yield
nitrogen management practice
nitrous oxide (N2O)
methane (CH4)
paddy fields
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Summary:Methane (CH ) and nitrous oxide (N O) are two extremely important greenhouse gases in the atmosphere. Nitrogen fertilizer is an important factor affecting CH and N O emissions in rice fields. Rational application of nitrogen fertilizer can not only promote high yields of rice but also reduce greenhouse gas emissions. Existing studies have shown that nitrogen reduction and optimal application can effectively improve the nitrogen use efficiency of rice on the basis of ensuring the yield and reduce the loss of N O caused by nitrification and denitrification of excessive nitrogen in soil. Fertilization times and fertilizer types have significant effects on CH and N O emissions in paddy fields. In this study, a field experiment was conducted for two consecutive years (2019-2020) to study the effects of fertilizer application on CH and N O emissions from rice fields by setting up four treatments consisting of no fertilizer (CK), customary fertilizer application by farmers (CF), twice fertilizer (TT), and 20% replac
ISSN:0250-3301