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

• Published in: Huanjing 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
• Language: Chinese
• 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
• ISSN: 0250-3301

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