Study of cinnamon leaf powder (Cinnamomum burmannii Ness ex. Bl) as a source of cinnamaldehyde on in vitro feed digestibility

Abstract

This study aimed to determine the effect of adding cinnamon leaf powder (Cinnamomum burmannii Ness ex. BI) as a source of cinnamaldehyde at different levels on in vitro nutrient digestibility, namely dry matter (DM), organic matter (OM), crude protein (CP), and crude fiber (CF) in the rumen, post-rumen, as well as total digestibility. The treatments consisted of a control diet (without cinnamon leaf powder) and rations supplemented with 1, 2, 3, and 4% DM feed, equivalent to cinnamaldehyde 16, 32, 48, and 64 mg/kg DM feed. A two-stage in vitro method was used for 48 hours to determine rumen digestibility and 96 hours for total digestibility, with three replications. The variables observed were dry matter digestibility, organic matter digestibility, crude protein digestibility, and crude fiber digestibility in the rumen, post-rumen, and total. Data were analyzed using a completely randomized design followed by Duncan’s New Multiple Range Test (DMRT). The results showed that increasing the level of cinnamon leaf powder up to 3% increased the digestibility of DM in the rumen, CP in post-rumen, and DM and CP in total, but if the level was added to 4% it would decrease the level of digestibility in the rumen and total digestibility. It can be concluded that adding of 3% cinnamon leaf powder, equivalent to cinnamaldehyde 48 mg/kg of feed DM, increase total DM and CP digestibility and protect feed protein from microbial degradation in the rumen.