- Volume 13 Issue 3
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Effects of spent mushroom (Flammulina velutipes) substrates on in vitro ruminal fermentation characteristics and digestibility of whole crop sorghum silage
팽이버섯 수확후배지 첨가가 수수 사일리지의 in vitro 반추위 발효특성 및 소화율에 미치는 영향
- Moon, Yea Hwang (Department of Animal Science & Biotechnology, Gyeongnam National University of Science and Technology) ;
- Chang, Sun Sik (Hanwoo Research Institute, National Institute of Animal Science, RDA) ;
- Kim, Eun Tae (Department Animal Resource Development, National Institute of Animal Science, RDA) ;
- Cho, Woong Gi (Division of Applied Life Science, Gyeongsang National University) ;
- Lee, Shin Ja (Division of Applied Life Science, Gyeongsang National University) ;
- Lee, Sung Sil (Division of Applied Life Science, Gyeongsang National University) ;
- Cho, Soo Jeong (Department of Phamaceutical Engineering, Gyeongnam National University of Science and Technology)
- 문여황 (경남과학기술대학교 동물생명과학과) ;
- 장선식 (농촌진흥청 한우시험장) ;
- 김언태 (농촌진흥청 축산과학원) ;
- 조웅기 (경상대학교 응용생명과학부) ;
- 이신자 (경상대학교 응용생명과학부) ;
- 이성실 (경상대학교 응용생명과학부) ;
- 조수정 (경남과학기술대학교 제약공학과)
- Received : 2015.08.03
- Accepted : 2015.09.30
- Published : 2015.09.30
The in vitro experiment was conducted to ensure the supplemental level of spent Flammulina velutipes mushroom substrates (SMS) as an energy source in manufacturing of whole crop sorghum silage. Sorghum harvested at heading stage was ensiled with spent mushroom substrates of 20% (S-20), 40% (S-40) and 60% (S-60) as fresh matter basis for 6 week. The experiment was conducted by 3, 6, 9, 12, 24, 48 hrs of incubation time with 3 replications. The silages were evaluated fermentation characteristics and dry matter digestibility (DMD) in vitro. The pH of in vitro solution was inclined to decrease with elapsing the incubation time, and that of the S-20 was significantly (P<0.05) lower than the other treatment at 48 hr of incubation. Gas production was greater (P<0.05) in the S-20 than the other treatments at 6 and 12 hrs of incubation. The microbial growth in vitro was inclined to decrease following 24 hr of incubation, and thereafter sustained the similar levels. In vitro dry matter digestibility (IVDMD) was lowered by increasing the supplemental level of spent mushroom substrate, and was a low level in the S-60 throughout whole incubation time. Although the IVDMD for S-40 was steadily increased from 9 hr of incubation and reached to similar level with the S-20 at 48 hour of incubation, however SMS for whole crop sorghum silage fermentation might as well add about 20 to 30% in fresh matter basis when considering DMD.
본 시험은 팽이버섯 수확후배지 첨가비율(20, 40, 60%)에 따라 제조된 사일리지를 in vitro 반추위 발효실험을 통하여 버섯수확후배지의 적정 첨가수준을 규명하고자 수행되었다. In vitro 실험은 발효시간대를 3, 6, 9, 12, 24 및 48시간으로 설정하고, 각 처리구별로 3반복으로 발효 특성과 건물소화율이 측정되었다. In vitro 배양액의 pH는 배양시간이 길어짐에 따라 낮아지는 경향이었으며, 48시간 경과 시에는 버섯수확후배지 20%첨가구가 타 처리구에 비해 유의적(P<0.05)으로 낮았다. 가스발생량은 버섯 수확후배지 20%를 첨가한 S-20구의 6시간 및 12시간 발효구가 타 처리구에 비해 유의적(P<0.05)으로 높게 나타났다. 미생물 성장량은 배양시간이 경과함에 따라 줄어드는 경향이었으며, 발효 24시간대부터는 대체로 비슷한 수준에서 유지되었다. 건물소화율은 20-30%수준으로 버섯수확후배지의 첨가비율이 높을수록 낮았는데, S-40구의 경우는 발효 9시간이후로 지속적으로 증가되어 48시간 발효 시에는 S-20구와 비슷한 수준이 된 반면, S-60구에서는 전 발효기간 동안 건물소화율이 매우 낮은 상태에 있었다. 이전 보고에서 사일리지 발효상태는 S-40구가 좋았으나 in vitro 반추위 소화시험의 결과를 고려할 때, 수수 사일리지 제조 시 팽이버섯수확후배지 첨가비율은 20-30%수준으로 하는 것이 적당할 것으로 판단된다.
Supported by : 농촌진흥청
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