Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Effects of Water Management Rice Straw and Compost on Methane Emission in Dry Seeded Rice

벼 건답직파재배에서 물관리와 볏짚 및 퇴비가 메탄배출에 미치는 영향

  • Ko, Jee-Yeon (National Yeongnam Agricultural Experimental Station, RDA) ;
  • Kang, Hang-Won (National Yeongnam Agricultural Experimental Station, RDA) ;
  • Park, Kyong-Bae (National Yeongnam Agricultural Experimental Station, RDA)
  • Published : 1996.09.30
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Abstract

Investgated in relation to Methane emission on dry seeded rice culture was flooding and intermittent irrigation and application time of rice straw in clayey soil. Negative peaks of the methane emission before 3 leaves stage which were never seen in the transplanting cultivation was found and the highest peak was come out at the heading stage. Total amount of emitted methane was lower about 40% than that of the transplanted. Methane emission decreased about 19% by intermittent irrigation. Compost and NPK application reduced methane about 70% and 80% in comparisin with rice straw. Rice straw application one month before sowing reduced methane emission than the application just before sowing.

건답직파 재배시 물관리 및 유기물원별 볏짚의 시용시기를 달리하여 메탄배출량을 조사한 결과는 다음과 같다. 1. 건답직파재배시 논토양에서 발생하는 메탄가스의 배출양상은 3엽기 이전까지는 마이너스 배출치를 나타내다가 생육의 진전과 기온의 상승에 따라 계속 증가하여 출수기에 최대Peak를 나타내었다. 2. 유기물원별 메탄가스의 배출량은 볏짚 시용구에서 가장 많았으며 퇴비시용은 NPK시용에 비해 크게 증가하지 않았다. 또한 볏짚 시용시기별로는 파종 한달전 시용함이 파종직전 처리에 비해 약40%의 메탄배출저감효과를 보았다. 3. 물관리별로는 간단관개가 상시담수에 비해 약19% 저감되었다.

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