| Title: | Feed Preference Response of Weaner Bull Calves to Bacillus amyloliquefaciens H57 Probiotic and Associated Volatile Organic Compounds in High Concentrate Feed Pellets |
| Author(s): | Ngo TT; Bang NN; Dart P; Callaghan M; Klieve A; Hayes B; McNeill D; |
| Address: | "School of Veterinary Science, The University of Queensland, Gatton, QLD 4343, Australia. Faculty of Animal Science, Vietnam National University of Agriculture, Hanoi 131000, Vietnam. School of Agriculture and Food Sciences, The University of Queensland, Gatton, QLD 4343, Australia. Ridley AgriProducts Pty Ltd., Toowong, QLD 4066, Australia. Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, St Lucia, QLD 4069, Australia" |
| ISSN/ISBN: | 2076-2615 (Print) 2076-2615 (Electronic) 2076-2615 (Linking) |
| Abstract: | "This study tested the hypothesis that Bacillus amyloliquefaciens strain H57 (H57) improves preference by reducing the development of microbial volatile organic compounds (mVOCs) in feed pellets. Sixteen bull calves were, for 4 weeks, provided equal access to a panel of 8 automated feed bunks in a single paddock with some hay. Each bunk contained pellets with (H57) or without (Control) the H57, each aged for 4 months at either ambient or chiller temperature. Each treatment was changed to a new bunk pair position weekly. Relative preference was determined according to weight of pellets remaining per hour per treatment bunk pair per 24 h. Pellets were analysed for volatile organic compounds (VOCs) and the concentrations tested for correlation with relative preference. Calves showed the lowest preference (p < 0.0001) for the Control/Ambient treatment whereas preference for all other treatments (H57/Ambient; H57/Chiller; Control/Chiller) was similar. The Control/Ambient treatment odour profile grouped differently to the other 3 treatments which grouped similarly to each other. Up to 16 mVOCs were determined to have potential as pre-ingestive signals for the extent of microbial spoilage. Further studies are required to find which combination of these mVOCs, when added to pellets, results in feed aversion" |
| Keywords: | concentrate pellets microbial spoilage microbial volatile organic compounds odour weaned calf preference; |
| Notes: | "PubMed-not-MEDLINENgo, Thi Thuy Bang, Nguyen N Dart, Peter Callaghan, Matthew Klieve, Athol Hayes, Ben McNeill, David eng Melbourne, Australia/Ridley AgriProducts PTY Ltd/ Switzerland 2021/01/02 Animals (Basel). 2020 Dec 29; 11(1):51. doi: 10.3390/ani11010051" |
