This study was conducted to research on the efficacy of chemical treatment as an effective method for reducing mycotoxin in rice straw silage. As a chemical treatment method, ammonia and sodium hydroxid were treated at 4% level of rice straws contaminated with mycotoxin, and the effects of silage storage on fungal toxin reduction, fermentation quality, and fiber digestion were evaluated. Aflatoxin B1, B2, G1, G2 and fumonisin B1, B2 as well as deoxynivalenol were not detected in all experimental groups, and ochratoxin A and zearalenone were detected. Ochratoxin A was detected lower in the chemical treatment than control (41.23 g / kg) (p<0.05). Zearalenone showed lower results in sodium hydroxide treatment (297.44 μg / kg) than control (600.33 μg / kg) and ammonia treatment (376.00 μg / kg) (p<0.05). The pH of rice straw silage was the lowest in ammonia treatment and the highest in sodium hydroxide treatment (p<0.05). The lactic acid contents of control and ammonia treatments were similar, but sodium hydroxide treatment was the lowest (p<0.05). Propionic acid was higher in the control than in the chemical treatments (p<0.05), and showed similar contents in the ammonia and sodium hydroxide treatment. Both the rumen microbial degradation rate of NDF and ADF showed the highest in sodium hydroxide treatment, followed by ammonia treatment, and the control showed the lowest level (p<0.05). Therefore, the results of this study are demonstrated to have a good effect on the treatment of ammonia and sodium hydroxide to reduce the mycotoxins and increase the rumen microbial degradation rate in the rice straw silage. Sodium hydroxide treatment was more effective in reducing mycotoxins and improving fiber degradation rate than ammonia treatment, but it is thought to have an inefficient effect on silage fermentation in rice straw silage.

ABSTRACT
Ⅰ. 서 론
Ⅱ. 재료 및 방법
    1. 곰팡이독소 오염 및 화학처리 볏짚 사일리지 제조
    2. 사일리지의 pH 및 유기산 조사
    3. 사일리지내 곰팡이독소 분석
    4. NDF 및 ADF의 in situ 소화율 분석
    5. 통계처리
Ⅲ. 결과 및 고찰
    1. 곰팡이독소 저감에 대한 효과
    2. 볏짚 사일리지의 유기산 발효에 미치는 영향
    3. 반추위 미생물의 NDF 및 ADF 분해에 미치는 영향
Ⅳ. 요 약
Ⅴ. 사 사
Ⅵ. REFERENCES

• 성하균(상지대학교 동물자원학과) | Ha Guyn Sung (Dept. of Animal Science, Sangji University) Corresponding author