Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Composting of Pig Manure Affected by Mixed Ratio of Sawdust and Rice Hull

톱밥 및 왕겨 혼합조건이 돈분 퇴비화에 미치는 영향

  • 윤홍배 (농촌진흥청 국립농업과학원) ;
  • 이예진 (농촌진흥청 국립농업과학원) ;
  • 김명숙 (농촌진흥청 국립농업과학원) ;
  • 이상민 (농촌진흥청 국립농업과학원) ;
  • 이연 (농촌진흥청 국립농업과학원) ;
  • 이용복 (경상대학교 농업생명과학원)
  • Received : 2012.10.12
  • Accepted : 2012.11.23
  • Published : 2012.12.31
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Abstract

A bulking agent is an essential material for composting of high-moisture livestock manure such as pig slurry. Sawdust has been used as the most popular bulking agent but resources are limited in Korea. In this study, the feasibility of rice hull as a bulking agent was examined for composting of solid pig manure. The solid pig manure was mixed with 15% sawdust (PM+SD15), 15% rice hull (PM+RH15), 10% sawdust and 5% rice hull (PM+SD10+RH5), and 5% sawdust and 10% rice hull (PM+SD5+RH10) based on fresh weight. These mixtures were composted for 35 days. The average temperature of the composting file for 35 days was higher in PM+SD10+RH5 and PM+SD5+RH10 than in PM+SD15 and PM+RH15. The mass loss of PM+SD10+RH5 and PM+SD5+RH10 were 36.7 and 36.4%, respectively, which were higher than that of PM+SD15 and PM+RH15. After composting, organic matter content and organic matter/nitrogen ratio in all treatments met the official standards of commercial fertilizers. We concluded that rice hull may be a good bulking agent for pig manure composting when it is used in mixture with sawdust.

본 연구에서는 돈분퇴비 제조 시 톱밥소요량을 줄이는 방안을 모색하고자 왕겨의 혼용 효과를 분석하였다. 실험기간 35일 동안 퇴비의 평균 온도는 PM+SD5+RH10 와 PM+SD10+RH5 처리구가 가장 높게 유지되었다. 모든 처리구의 유기물함량 및 OM/N ratio는 시험을 종료한 5주차에서 비료공정규격의 범위를 만족하였다. 퇴비의 중량 감소율은 PIM+SD10+RH5와 PIM+SD5+RH10 처리에서 각각 36.7%와 36.4%로 타 처리에 비해 가장 높았다. 따라서 퇴비의 온도상승과 더불어 무게 감소율을 종합해 볼 때 대조구(PIM+SD15 처리) 대비 PIM+SD10+RH5와 PIM+SD5+RH10처리에서 왕겨를 활용함으로써 톱밥사용량의 약 30-65% 대체가 가능한 것으로 판단된다.

Keywords

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