期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 61, 期 24, 页码 5727-5737出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf401544v
关键词
methane; Hohenheim gas test; phenolic compounds; volatile fatty acids; protozoa; ruminant feed; byproducts; food waste
资金
- Federal Ministry of Food, Agriculture and Consumer Protection (BMELV) via the Federal Office for Agriculture and Food (BLE)
Several food processing byproducts were assessed as potential feed and feed supplements. Since their chemical composition revealed a high nutritional potential for ruminants, the Hohenheim in vitro gas test was used to investigate total gas, methane, and volatile fatty acid production as well as protozoal numbers after ruminal digestion of different substrate levels. Processing byproducts used were low- and high-esterified citrus and apple pectins, integral mango peels, and depectinized mango peels. In addition, the effect of a phenolic mango peel extract and pure gallic acid was investigated. The highest decrease in methane production (19%) was achieved by supplementing high levels of low-esterified citrus pectin to the hay-based diet. Interestingly, total gas production was not affected at the same time. Showing valuable nutritional potential, all byproducts exhibited, e.g., high metabolizable energy (11.9-12.8 MJ/kg DM). In conclusion, all byproducts, particularly low-esterified citrus pectin, revealed promising potential as feed and feed supplements.
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