Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Effects of Applying Microbial Additive Inoculants to Spent Mushroom Substrate (Flammulina velutipes) on Rumen Fermentation and Total-tract Nutrient Digestibility in Hanwoo Steers

팽이버섯 부산물 발효에 따른 한우 거세우 반추위 성상 및 소화율에 미치는 영향

  • Baek, Youl-Chang (Animal Nutrition & Physiology Team, National Institute of Animal Science, RDA) ;
  • Jeong, Jin-Young (Animal Nutrition & Physiology Team, National Institute of Animal Science, RDA) ;
  • Oh, Young-Kyoon (Animal Nutrition & Physiology Team, National Institute of Animal Science, RDA) ;
  • Kim, Min-Seok (Animal Nutrition & Physiology Team, National Institute of Animal Science, RDA) ;
  • Lee, Sung-Dae (Animal Nutrition & Physiology Team, National Institute of Animal Science, RDA) ;
  • Lee, Hyun-Jeong (Animal Nutrition & Physiology Team, National Institute of Animal Science, RDA) ;
  • Do, Yoon-Jung (Animal Disease & Biosecurity Team, National Institute of Animal Science, RDA) ;
  • Ahmadi, Farhad (Division of Food Biosciences, College of Health and Medical Life Sciences, Konkuk University) ;
  • Choi, Hyuck (Animal Nutrition & Physiology Team, National Institute of Animal Science, RDA)
  • Received : 2017.03.17
  • Accepted : 2017.07.19
  • Published : 2017.08.31
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Abstract

We inoculated a spent mushroom substrate from Flammulina velutipes (SMSF) with a microbial additive and assessed the effects on chemical composition, ruminal fermentation parameters, and total-tract nutrient digestibility. In Exp. 1, three cannulated Hanwoo steers were used in an in situ trial to determine the degradation kinetics of dry matter (DM) and crude protein (CP). In Exp. 2, three Hanwoo steers were randomly assigned to experimental diets according to a $3{\times}3$ Latin square for a 3-week period (2 weeks for adaptation and 1 week for sample collection). Experimental diets included the control diet (3.75 kg/d formulated concentrate mixture + 1.25 kg/d rice straw), SMSF diet (3.19 kg/d formulated concentrate mixture + 1.25 kg/d rice straw + 0.56 kg/d SMSF), and inoculated SMSF (ISMSF) diet (3.19 kg/d formulated concentrate mixture + 1.25 kg/d rice straw + 0.56 kg/d ISMSF). The chemical composition of ISMSF did not differ from that of SMSF. Microbial additive inoculation decreased pH (P<0.05) and improved preservation for SMSF. The percentages of DM, neutral detergent fiber (NDF), and acid detergent fiber (ADF) in ISMSF were slightly lesser than those in SMSF. Ruminal fermentation characteristics and total-tract nutrient digestibility were not affected by diet. Overall, microbial additive inoculation improved preservation for SMSF and may allow improved digestion in the rumen; however, the total digestible nutrients (TDN) of SMSF and ISMSF diets were slightly lesser than the control diet. The ISMSF can be used as an alternative feedstuff to partially replace formulated concentrate feed.

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References

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