가축분퇴비 및 토양개량제 처리가 온난화 가스 배출에 미치는 영향
Effects of Livestock Compost and Soil Conditioner Application on Greenhouse Gases Emission in Paddy Soil
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논 토양으로부터 발생된 지구온난화 가스의 배출 제어 기술을 구명하기 위하여 논 토양에서 가축분퇴비 및 토양개량제 시용에 따른 온실가스 배출 양상을 검토하였다. 축분퇴비 시용에 따른 CH4 배출량은 우분퇴비 처리구가 331 kg ha-1로 가장 많았으며, 돈분퇴비 시용구는 282 kg ha-1, 계분퇴비 시용구는 294 kg ha-1이었다. N2O 배출량은 계분퇴비 시용구가 1.78 kg ha-1, 돈분퇴비 시용구가 1.78 kg ha-1, 우분퇴비 시용구가 1.60 kg ha-1이었다. 반면에 볏짚을 시용한 처리구의 N2O 배출량은 1.44 kg ha-1이었다. 지구온난화지수(global warming potential : GWP)는 우분퇴비 처리구가 7,447 kg ha-1로 가장 많았으며, 돈분퇴비 시용구는 6,474 kg ha-1, 계분퇴비 시용구는 6,726 kg ha-1그리고 볏짚시용구는 6,956 kg ha-1이었다. 토양개량제 시용에 의한 온난화 가스 배출시험에서 석회 시용구의 CH4 배출량은 다른 처리에 비해 373 kg ha-1로 가장 많았으며, 규산 시용구는 264 kg ha-1, 인공제올라이트 시용구는 239 kg ha-1 그리고 볏짚 시용구는 310 ㎏ ㏊-1이었다. N2O 배출량은 석회 시용구가 1.49 kg ha-1, 규산 시용구가 1.40 kg ha-1, 인공제올라이트 시용구가 1.38 kg ha-1이었다. 지구온난화지수(GWP)는 석회 처리구가 8,295 kg ha-1, 규산 시용구는 5,978 kg ha-1, 인공제올라이트 시용구는 5,447 kg ha-1 그리고 볏짚 시용구는 6,956 kg ha-1이었다.
Abstract
To find out reducing way of methane emission from a paddy field monitoring on the greenhouse gases emissions were carried out in the paddy soil with livestock compost and soil conditioner.The seasonal variations of methane emission were high at 36 days and 86 days after rice transplanting, on the other hand those of nitrous oxide emission were high at 64 days after that day. Methane emission by cow compost application, pig compost application and chicken compost application were 331, 282 and 294 kg ha-1, respectively. Otherwise, nitrous oxide emissions by cow compost application, pig compost application and chicken compost application were 1.60, 1.78 and 1.78 kg ha-1 respectively. The total emission rate of greenhouse gases equivalent to CO2 emission rate (GWP) was 7,447 kg ha-1 in cow compost application, 6,474 kg ha-1 in pig compost application and 6,726 kg ha-1 in chicken compost application.Methane emission by Ca, SiO2 and artificial zeolite application were 373, 264, 239 kg ha-1, respectively. The total emission rate of greenhouse gases equivalent to CO2 emission rate (GWP) was 8,295 kg ha-1 in Ca application, 5,978 kg ha-1 in SiO2 application and 5,447 kg ha-1 in artificial zeolite application.
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