Kulit buah melinjo memiliki potensi sebagai pakan sumber energi untuk ruminansia, namun saat ini belum banyak yang memanfaatkannya. Penelitian bertujuan untuk mengukur total digestible nutrient (TDN) ransum yang mengandung kulit buah melinjo. Dua puluh ekor domba betina dialokasikan ke dalam 5 macam ransum perlakuan yang mengandung 0% (R1), 5% (R2), 10% (R3), 15% (R4), dan 20% (R5) tepung kulit buah melinjo. Penelitian dilaksanakan menggunakan rancangan acak lengkap, data yang terkumpul dianalisis dengan uji Duncan. Peubah yang diukur adalah kecernaan protein kasar, kecernaan lemak kasar, kecernaan serat kasar, kecernaan bahan ekstrak tanpa nitrogen (BETN), dan TDN. Hasil menunjukkan bahwa perlakuan memberikan pengaruh yang nyata (P<0,05) terhadap kecernaan lemak kasar, kecernaan BETN dan TDN dan tidak terhadap kecernaan protein kasar dan kecernaan serat kasar. Ransum yang menggunakan kulit buah melinjo sebanyak 20% (R5) menghasilkan kecernaan BETN yang paling tinggi (P<0,05) sama dengan perlakuan R3 dan R4. Sementara itu, lemak kasar dan TDN memiliki nilai yang paling rendah (P<0,05) diantara perlakuan, akan tetapi nilai TDN (70,17%) tersebut masih dalam kisaran kebutuhan domba. Kesimpulan menunjukkan bahwa tepung kulit buah melinjo sebanyak 20% dapat dimanfaatkan sebagai bahan pakan dalam ransum domba dan menghasilkan nilai TDN yang optimal.
The evaluation of digested protein and total digestible nutrient in rations containing melinjo peels could be done using several prediction models, but testing was needed to determine the level of accuracy. This study aimed to evaluate the accuracy of the prediction formula for protein digestibility and total digestible nutrient from rations containing melinjo peels of 5%, 10%, 15%, and 20%. Sixteen local ewes aged 11-12 monts with an initial body weight of 22.56 ± 1.46 kg were used to evaluate the value of digested protein and total digestible nutrient. The observational data were used to calculate the ratio of prediction to deviation value in assessing the accuracy of various prediction models for digested protein, namely Wardeh (1981) and Knight's and Harris (1966) models, while total digestible nutrient, namely Sutardi (2001), Wardeh (1981), and Harris et al. (1972) models. Wardeh (1981) and Knight and Harris’s (1966) digestible protein model, yielded ratio of prediction to deviation values of 3.28 and 3.37, respectively. Meanwhile, the ratio of prediction to deviation value on total digestible nutrient respectively from the highest value was Sutardi (2001), Wardeh (1981), and Harris et al. (1972) of 4.57, 3.68 and 1.91. In conclusion, Knight and Harris's (1966) digestible protein and Sutardi's (2001) total digestible nutrient model were the most accurate.
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