This study evaluated the odor mitigation effect of rice husk biochar addition to the bedded pack dairy barn floor using lab-scale reactors for five days. Rice husk biochar mixed with dairy manure and sawdust mixture at different ratios (5%-addition test unit: adding biochar by 5% of the total solid weight of the mixture, 10%-addition test unit: adding biochar by 10% of the total solid weight of the mixture). Cumulative NH3 and H2S emissions of 10%-addition test unit were reduced by 26% (p< 0.05) and 46% (p = 0.0655), respectively, compared with control. However, 5%-addition test unit did not show NH3 and H2S emission reduction. Further research is needed to determine the appropriate level of biochar addition between 5 and 10%, and to evaluate applicability in the field through economic analysis.

Abstract
1. 서 론
2. 연구방법
    2.1 실험 설계
    2.2 암모니아, 황화수소 발생량 평가
    2.3 젖소분뇨와 톱밥 시료 분석
    2.4 Rice husk biochar 특성 분석
    2.5 통계 분석
3. 연구결과
    3.1 Rice husk biochar 특성
    3.2 NH3와 H2S 저감효과
4. 결 론

• 신진호(충남대학교 동물자원과학부) | Jinho Shin (Division of Animal & Dairy Science, College of Agriculture and Life Sciences, Chungnam National University, S. Korea)
• 이양준(충남대학교 동물자원과학부) | Yangjoon Lee (Division of Animal & Dairy Science, College of Agriculture and Life Sciences, Chungnam National University, S. Korea)
• 김대훈(충남대학교 동물자원과학부) | Daehun Kim (Division of Animal & Dairy Science, College of Agriculture and Life Sciences, Chungnam National University, S. Korea)
• 이승훈(충남대학교 동물자원과학부) | Seunghun Lee (Division of Animal & Dairy Science, College of Agriculture and Life Sciences, Chungnam National University, S. Korea)
• 안희권(충남대학교 동물자원과학부) | Heekwon Ahn (Division of Animal & Dairy Science, College of Agriculture and Life Sciences, Chungnam National University, S. Korea) Corresponding Author