완효성 비료를 시용한 논에서의 물관리에 따른 온실가스 배출량 평가

• Published in: Hanguk hwangyeong nonghak hoeji Vol. 42; no. 2; pp. 112 - 120
• Main Authors: 장은빈, Eun-bin Jang, 정현철, Hyun-chul Jeong, 권효숙, Hyo-suk Gwon, 이형석, Hyoung-seok Lee, 박혜란, Hye-ran Park, 이종문, Jong-mun Lee, 오택근, Taek-keun Oh, 이선일, Sun-il Lee
• Format: Journal Article
• Language: Korean
• Published: 한국환경농학회 30.06.2023
• Subjects: Methane; Mid-summer drainage; Nitrous oxide; Rice paddy; Slow-released fertilizer; 농학; Methane; Slow-released fertilizer; Nitrous oxide; Mid-summer drainage; Rice paddy
• ISSN: 1225-3537; 2233-4173
• DOI: 10.5338/KJEA.2023.42.2.14

Methane (CH 4 ) and nitrous oxide (N 2 O) are significant contributors to greenhouse gas (GHG) emissions from rice fields. Mid-summer drainage is a commonly practiced water management technique that reduces CH 4 emissions from rice fields. Slow-release fertilizers gradually release nutrients over an extended period and have been shown to reduce N 2 O emissions. However, the combined effect of slow-release fertilizer and water management on GHG emissions remains unclear. This study compared GHG emissions from a rice paddy subjected to mid-summer drainage for 10 days (control) with that of a rice paddy subjected to prolonged mid-summer drainage for 20 days combined with slow-release fertilizer (W+S). Gas sampling was conducted weekly using a closed chamber method. During the rice cultivation period, cumulative CH 4 and N 2 O emissions were reduced by 12.3% and 16.2%, respectively, in the W+S treatment compared to the control. Moreover, the W+S treatment exhibited a 1.9% increase in grain yield compared to the control. Under experimental conditions, slow-release fertilizers, in combination with prolonged mid-summer drainage, proved to be the optimal approach for achieving high crop yield while reducing GHG emissions. This represents an effective strategy to mitigate GHG emissions from rice paddy fields.