Agro-industrial by-products as ruminant feed: Nutritive value and in vitro rumen fermentation evaluation.

Publisher: Wiley Country of Publication: Australia NLM ID: 100956805 Publication Model: Print Cited Medium: Internet ISSN: 1740-0929 (Electronic) Linking ISSN: 13443941 NLM ISO Abbreviation: Anim Sci J Subsets: MEDLINE

Publication: Richmond, Vic. : Wiley
Original Publication: Tokyo, Japan : Japanese Society of Zootechnical Science [1999-

Rumen*/metabolism ; Rumen*/microbiology ; Animal Feed* ; Fermentation* ; Citrus* ; Nutritive Value* ; Ruminants*/metabolism ; Digestion* ; Diet*/veterinary; Animals ; Methane/metabolism ; Animal Nutritional Physiological Phenomena/physiology ; Onions ; In Vitro Techniques ; Dietary Fiber/metabolism ; Cattle/metabolism

In recent years, agricultural by-products have generated increasing interest as ruminant feed. In a completely randomized design with five experimental treatments, this in vitro study investigated the nutritional value of citrus pulp and onion peel as alternative feed for ruminants and their effects on rumen fermentation, digestibility, and gas production. The first group was the control (50% grass hay/50% concentrate mixture). The other four treatments represented citrus pulp and onion peel at inclusion levels of 10 and 20%, replacing the expensive, high-quality feed ingredients such as the concentrate mixture. The chemical composition showed that citrus pulp is an energy-rich material that could be included up to 20% to replace part of the concentrate in a mixed diet without any adverse impacts on rumen fermentation parameters. The onion peels were rich in fiber and minerals. Their inclusion in the diet of over 10% had detrimental effects on rumen fermentation. The inclusion of either citrus pulp or onion peel in the diet did not have the potential to reduce enteric methane production. In conclusion, citrus pulp showed promising results as a new feed for ruminants. It was effective when included in up to 20% of a ruminant diet, replacing the concentrate mixture.
(© 2024 Japanese Society of Animal Science.)

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Keywords: Yuzu; alternative feed; citrus pulp; onion peel; sustainability

OP0UW79H66 (Methane)
0 (Dietary Fiber)

Date Created: 20240626 Date Completed: 20240626 Latest Revision: 20240626

20240627

10.1111/asj.13974

38924221