볏짚 시용에 따른 벼 재배 논에서의 메탄 배출계수 개발에 관한 연구
New Estimates of CH4 Emission Scaling Factors by Amount of Rice Straw Applied from Korea Paddy Fields
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참고문헌
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초록
BACKGROUND: Accurate estimates of total direct CH4emissions from croplands on a country scale are important for global budgets of anthropogenic sources of CH4emissions and for the development of effective mitigation strategies. Methane production resulted by the anaerobic decomposition of organic compounds where CO2 acts as inorganic electron acceptor. This process could be affected by the addition of rice straw, water management and rice variety itself. METHODS AND RESULTS: Rice (Oryza sativa L. Japonica type, var Samkwangbyeo) was cultivated in four plots: (1) Nitrogen-Phosphorus-Potassium (NPK)(N-P2O5-K2O:90-45-57 kg/ha); (2) NPK plus 3 Mg/ha rice straw (RS3); (3) NPK plus 5 Mg/ha rice straw (RS5); (4)NPK plus 7 Mg/ha rice straw (RS7) for 3 years (2010-2012)and the rice straw incorporated in fall (Nov.) in Gyeonggi-do Hwaseong-si. Gas samples were collected using the closed static chamber which were installed in each treated plot of 152.9 m2. According to application of 3, 5, 7Mg/ha of rice straw, methane emission increased by 46,101, 190%, respectively, compared to that of the NPK plot. CONCLUSION(S): We obtained a quantitative relationship between CH4 emission and the amount of rice straw applied from rice fields which could be described by polynomial regression of order 2. The emission scaling factor estimated by the relationship were in the range of IPCC GPG (2000).
Abstract
BACKGROUND: Accurate estimates of total direct CH4emissions from croplands on a country scale are important for global budgets of anthropogenic sources of CH4emissions and for the development of effective mitigation strategies. Methane production resulted by the anaerobic decomposition of organic compounds where CO2 acts as inorganic electron acceptor. This process could be affected by the addition of rice straw, water management and rice variety itself. METHODS AND RESULTS: Rice (Oryza sativa L. Japonica type, var Samkwangbyeo) was cultivated in four plots: (1) Nitrogen-Phosphorus-Potassium (NPK)(N-P2O5-K2O:90-45-57 kg/ha); (2) NPK plus 3 Mg/ha rice straw (RS3); (3) NPK plus 5 Mg/ha rice straw (RS5); (4)NPK plus 7 Mg/ha rice straw (RS7) for 3 years (2010-2012)and the rice straw incorporated in fall (Nov.) in Gyeonggi-do Hwaseong-si. Gas samples were collected using the closed static chamber which were installed in each treated plot of 152.9 m2. According to application of 3, 5, 7Mg/ha of rice straw, methane emission increased by 46,101, 190%, respectively, compared to that of the NPK plot. CONCLUSION(S): We obtained a quantitative relationship between CH4 emission and the amount of rice straw applied from rice fields which could be described by polynomial regression of order 2. The emission scaling factor estimated by the relationship were in the range of IPCC GPG (2000).
참고문헌 (14)
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