OPTIMALISASI PENGGUNAAN SERAT SAWIT SEBAGAI PAKAN SERAT ALTERNATIF DENGAN SUPLEMENTASI DAUN UBI KAYU DALAM RANSUM RUMINANSIA [The Supplementation of Cassava Leaves to Optimize the Use of Palm Press Fiber as Ruminant Feed]

Abstract

ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh serat sawit yang diamoniasi dengan urea dan suplementasi daun ubi kayu terhadap kecernaan zat-zat makanan dan pertambahan bobot badan ternak domba. Penelitian dilaksanakan di UPT dan Laboratorium Gizi Ruminansia Fakultas Peternakan Universitas Andalas, Padang. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok dengan tiga perlakuan dan lima kali ulangan sehingga terdapat 15 unit percobaan yang terdiri atas satu ekor domba lokal jantan umur 1- 1,5 tahun dengan bobot badan 10 – 14 kg. Perlakuan yang diterapkan adalah tiga jenis ransum yaitu ransum (A) terdiri atas 50% rumput lapangan dan 50% konsentrat, ransum (B) adalah 50% serat sawit amoniasi dan 50% konsentrat, dan ransum (C) adalah ransum B ditambah 15% daun ubi kayu. Hasil penelitian menunjukkan bahwa kecernaan bahan kering ransum B nyata lebih rendah dibanding ransum A (51,16 vs 64,51%). Suplementasi 15% daun ubi kayu pada ransum C nyata meningkatkan kecernaan bahan kering dibanding ransum B (51,16 vs 57,98%). Pertambahan bobot badan ternak yang mendapat serat sawit amoniasi dan suplementasi 15 % daun ubi kayu (ransum C) nyata lebih tinggi dibanding ransum serat sawit amoniasi saja (ransum B) (54 g/hari vs 21 g/hari) Kata kunci: serat sawit, daun ubi kayu, kecernaan ABSTRACT The aims of this experiment was to evaluate the effect of ammoniated (palm press fiber) PPF and cassava leaves supplementation on digestibility and liveweight gain of sheep. The experiment was conducted at UPT and the Ruminant Nutrition Laboratory, Faculty of Animal Science, Andalas University. The treatment was arranged in randomized blok design consisting of three treatments and five replicates. The total number of experimental units were 15 units, each unit consisted of a head 0f 1 – 1.5 years old local rams with the initial live weight 10 – 14 kg. The treatments were A = 50% nature grass and 50% concentrate; B = 50% of PPF, previously treated by 6% urea and 50% concentrate; C = B + 15% cassava leaves. The result indicated that animals on the amoniated PPF diet (B) has lower digestibility than those on nature grass (51.16 vs 64, 51%). The supplementation of 15 % cassava leaves increased the digestibility of amoniated PPF diet (C) 51.16 to 57.98%. The liveweight gain of rams fed PPF diet with cassava leaves supplementation were better than those of rams fed diet B (54 g/day vs 21 g/day). Keywords : palm press fiber, cassava leaves, digestibility