Physicochemical, thermal properties, and in vitro rumen fermentation of four different underutilized fruit by-products

Abstract. Fidriyanto R, Priadi G, Ridwan Nahrowi N, Jayanegara A. 2023. Physicochemical, thermal properties, and in vitro rumen fermentation of four different underutilized fruit by-products. Biodiversitas 24: 2416-2425. The objective this study was to investigate the potential use selected agricultural wastes consisting Mangosteen (Garcinia mangostana L.) Peel (MGP), pomegranate (Punica granatum (PGP), kaffir lime (Citrus hystrix DC.) (KLP), Melastoma candidum D.Don Fruit (MCF) as ruminant feeds enteric methane mitigation. samples were analyzed for proximate, phytochemical, enzyme inhibition activity, XRD, FTIR, TGA, fermentation. found that MCF had highest protein content (105.69 g/kg DM), while KLP lowest crude fiber (115.89 DM). extract total phenol flavonoid, PGP activity. XRD analysis showed crystallinity (18.23%), followed by (17.95%). gas production (147.78 mL), (62.20 (27.86 MGP (4.46 mL). In addition, digestibility, post-rumen VFA a similar pattern. observed MCF. conclusion, peel is potentially used feed due its higher digestibility production. Although has lower it source phenolic compounds reduce flavonoid content.