Nutritional and Antioxidant Evaluation of Herbal Pulp Oryza sativa and Kaempferia galangal L. for Potential Use of a Feed Additive in Poultry

Herbal pulp from the production of beras kencur (a traditional Indonesian herbal drink made from Oryza sativa and Kaempferia galangal L.) is an underutilized byproduct that contains valuable nutrients. This study aimed to determine the nutritional content of Oryza sativa and Kaempferia galanga L. herbal pulp through proximate analysis and the evaluation of antioxidant compounds. The experiment employed four treatments: T1 (35% Kaempferia galanga L., 40% Oryza sativa, 5% pandan leaves, 20% palm sugar and water), T2 (50% Kaempferia galanga L., 35% Oryza sativa, 15% brown sugar and water), T3 (35% Kaempferia galanga L., 45% Oryza sativa, 20% brown sugar and water), and T4 (40% Kaempferia galanga L., 40% Oryza sativa, 20% brown sugar and water). The best treatment was T3, with 88.40% dry matter, 11.60% crude protein, 10.92% crude fat, 7.71% crude fibre, 67.42% nitrogen-free extract (NFE), 1.74% ash, 3991.29 kcal gross energy, pH 3.66, and 23.810 ppm antioxidant activity. Treatment T3 has the potential to be used as a feed additive for poultry, with a maximum inclusion rate of 1%. In summary, this study provides novel insight, as it is the first to comprehensively assess the proximate composition and antioxidant potential of Oryza sativa and Kaempferia galanga L. herbal pulp for its application as poultry feed additives.