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http://dx.doi.org/10.7740/kjcs.2016.61.4.251

Changes in Methane Emissions from Paddy under Different Tillage and Cultivation Methods  

Kim, Sukjin (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA)
Cho, Hyun-Suk (Crop production& Physiology Research Division, NICS, RDA)
Choi, Jong-Seo (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA)
Park, Ki Do (Crop foundation Research Division, NICS, RDA)
Jang, Jeong-Sook (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA)
Kang, Shin-gu (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA)
Park, Jeong-Hwa (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA)
Kim, Min-Tae (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA)
Kang, In-Jeong (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA)
Yang, Woonho (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.61, no.4, 2016 , pp. 251-256 More about this Journal
Abstract
The increase in carbon stock and sustainability of crop production are the main challenges in agricultural fields relevant to climate change. Methane is the most important greenhouse gas emitted from paddy fields. This study was conducted to investigate the effects of tillage and cultivation methods on methane emissions in rice production in 2014 and 2015. Different combinations of tillage and cultivation were implemented, including conventional tillage-transplanting (T-T), tillage-wet hill seeding (T-W), minimum tillage-dry seeding (MT-D), and no-tillage-dry seeding (NT-D). The amount of methane emitted was the highest in T-T treatment. In MT-D and NT-D treatments, methane emissions were significantly decreased by 77%, compared with that in T-T treatment. Conversely, the soil total carbon (STC) content was higher in MT-D and NT-D plots than in tillage plots. In both years, methane emissions were highly correlated with the dry weight of rice ($R^2=0.62{\sim}0.96$), although the cumulative emissions during the rice growing period was higher in 2014 than in 2015. T-T treatment showed the highest $R^2$ (0.93) among the four treatments. Rice grain yields did not significantly differ with the tillage and cultivation methods used. These results suggest that NT-D practice in rice production could reduce the methane emissions and increase the STC content without loss in grain yield.
Keywords
methane; no-tillage; paddy; rice;
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