Penelitian ini bertujuan untuk menentukan waktu optimal penyapihan anak babi agar induk babi dapat berahi kembali, guna meningkatkan efisiensi produksi dan reproduksi induk babi tersebut. Rancangan yang digunakan dalam penelitian ini adalah Rancangan Acak Kelompok dengan tiga perlakuan yaitu penyapihan umur 25 hari (A), penyapihan umur 28 hari (B), dan penyapihan umur 30 hari (C) pada tiga usaha peternakan babi. Setiap perlakuan terdiri dari tiga ulangan, dan masing-masing ulangan terdiri dari dua ekor induk babi. Variabel yang diamati meliputi: litter size, bobot badan anak babi yang disapih, induk berahi kembali pascasapih, dan mortalitas anak babi pascasapih. Hasil penelitian menunjukkan bahwa rataan bobot badan anak babi saat disapih berbeda nyata (P<0,05) pada perlakuan B yaitu: 6,83 kg (A), 8,17 kg (B), dan 9,0 kg (C). Mortalitas pascasapih yakni: 1,33% (A), 1,17% (B), dan 1,17% (C) tidak berbeda nyata (P<0,05) antar perlakuan; Induk kembali berahi setelah sapih rata-rata 3,67 hari (A dan C) dan 3,33 hari (B) tidak berbeda nyata (P>0,05). Rataan litter size mencapai 10,17 ekor (A), 13,0 ekor (B) dan 11,5 ekor (C) tidak berbeda nyata (P>0,05). Simpulan dari penelitian ini adalah waktu optimum pelaksanaan penyapihan anak babi adalah umur 28 hari.
This research aims to determine the effects of various dietary fats on blood cholesterol, fat composition and the growth of male Bali ducks (Anas sp). The experiment used a completely randomized design (CRD) with four treatments and ten replicates of five duck per pen. The experimental diets were supplemented by using 0% oil (T0), 3% palm oil (T1), 3% palm oil that is used repeatedly (T2), 3% pork oil (T3) and 3% fish oil (T4), respectively. At the end of the treatment, body weight, feed consumption and feed conversion were recorded. Total cholesterol and fat composition were determined. The results showed that supplementation of different sources of fat significantly affected the total cholesterol, fat composition, and growth performance. Ducks received control feed (without oil) and feed with fish oil supplementation produced lower blood cholesterol and lower fat composition than palm oil and pork oil supplementation. The supplementation of fish oil and pork oil caused significantly increased growth performance. However, fish oil and pork oil supplementation produce higher cholesterol in blood serum than those other treatments. It is concluded that dietary different lipid source altered the blood lipid profile, and growth performance in duck
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