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The purpose of this study was to evaluate the effect of a complete ration silage made of cassava biomass nitrogen retention, and metabolizable energy male ducks. Control diet consisted of corn, rice bran, coconut meal, soybean meal, vegetable oil, fish meal and premix. While the treatment of silage ration of cassava based (BBS) consisted of leaves, peel, and tubers of cassava, as well as a mix of fish meal, vegetable oil, premix, DL-methionine and L-lysine. The experimental design used was completely randomized design with 5 treatments and 4 replicates ie S0 (100% control diet), S25 (75% control diet + 25% BBS silage), S50 (50% control diet + 50% BBS silage), S75 (25% control diet + 75% BBS silage), and S100 (100% BBS silage ration). Measurement of metabolizable energy and nitrogen retention was conducted using 25 male ducks aged 10 weeks maintained in metabolic cages and adapted to experimental diets for seven days. Ducks were fasted for 24 hours before the experimental diets were offered. Metabolizable energy and nitrogen retention were measured by the method of Sibbald (1989). The results showed that a decline in nitrogen retention and, metabolizable energy along with the increasing level of BBS silage in the rations. The conclusion of this study was the use of up to 75% BBS silage generated metabolizable energy and nitrogen retention that do not differ from the control ration. Key words: cassava silage, complete ration, male duck, metabolizable energy, nitrogen retention

Aim: A study was undertaken to evaluate the optimum roughage to concentrate ratio in maize stover (MS) based complete diets for efficient microbial biomass production (EMBP) using in vitro gas production technique. Materials and Methods: MS based complete diets with roughage to concentrate ratio of 100:0, 90:10, 80:20, 70:30, 60:40, 50:50, 40:60, and 30:70 were formulated, and 200 mg of oven-dried sample was incubated in water bath at 39°C along with media (rumen liquor [RL] - buffer) in in vitro gas syringes to evaluate the gas production. The gas produced was recorded at 8 and 24 h of inc ubation. In vitro organic matter digestibility (IVOMD), metabolizable energy (ME), truly digestible organic matter (TDOM), partitioning factor (PF), and EMBP were calculated using appropriate formulae. Ammonia nitrogen and total volatile fatty acids (TVFAs) production were analyzed in RL fluid-media mixture after 24 h of incubation. Results: In vitro gas production (ml) at 24 h incubation, IVOMD, ME, TDOM, TVFA concentration, and ammonia nitrogen production were increased (p

2014 Basri (I 211 09 279). Kecernaan Bahan Kering dan Bahan Organik Ransum Komplit Dengan Kandungan Protein Berbeda Pada Kambing Marica Jantan. (Dibawah bimbingan Prof. Dr. Ir. Asmuddin Natsir, M.Sc sebagai Pembimbing Utama dan Ir. Muhammad Zain Mide, MS sebagai Pembimbing Anggota). ABSTRAK Bentuk ransum serta ketersediaan dan keseimbangan nutrisi dalam ransum, misalnya pada ransum komplit, akan berpengaruh terhadap pemanfaatan nutrisi ransum tersebut. Penelitian ini bertujuan untuk mengetahui kandungan protein kasar ransum komplit yang dapat mengoptimalkan tingkat kecernaan bahan kering dan bahan organik ransum komplit pada kambing merica jantan. Penelitian ini dilaksanakan menurut rancangan acak lengkap terdiri dari empat perlakuan dan tiga ulangan. Perlakuannya adalah A. Ransum komplit dengan kandungan protein 10.20%, B. 12.59%, C. 15.24%, dan D. 17.54%. sebanyak dua belas ekor kambing merica jantan ditempatkan pada kandang individu dan secara acak mendapat salah satu dari empat jenis ransum percobaan. Hasil percobaan memperlihatkan bahwa rataan daya cerna bahan kering bervariasi antara 62.8 % (ransum B) sampai 66.5% (ransum D). Rataan daya cerna bahan organik bervariasi antara 60.7% (ransum B) hingga 65.6% (ransum D). Namun demikian hasil statistik memperlihatkan bahwa perlakuan tidak memberikan pengaruh yang nyata (P>0.05) terhadap daya cerna bahan kering dan bahan organik ransum komplit. Kesimpulan, meningkatkan kadar protein ransum komplit dari 10% menjadi 17.5% tidak memberikan kontribusi yang signifikan terhadap peningkatan kecernaan bahan kering dan bahan organik ransum komplit. Kata Kunci : Kambing Marica, Kecernaan Bahan Kering dan Bahan Organik, Ransum Komplit 9 Basri (I 211 09 279). Dry Matter and Organic Matter Digestibility of Complete Ration Containing Different levels of Cride Protein on Male Merica Goat. (Under the guidance of Prof.. Dr.. Ir. Asmuddin Natsir, M.Sc as the Main Supervisor and Ir. Muhammad Zain Mide, MS as a Member Advisor). ABSTRACT The form of ration as well as availability and balancing of nutrient contents of the ration such as in complete ration will affect the utilization of those nutrients by the animal. The purpose of this experiment was to study the level of protein contents of complete ration that could optimize digestibility of dry matter and organic matter of the ration on male marica goat. The experiment was carried out according to completely randomised design consisted of four treatments and three replications for each treatment. The treatments were A. Complete ration containing 10.20% of crude protein, B. Complete ration containing 12.59% of crude protein, C. Complete ration containing 15.24% of crude protein, D. Complete ration containing 17.54% of crude protein. Twelve heads of marica goats were placed into an individual metabolic cage and was randomly fed one of four rations. The results of the experiment showed that dry matter digestibility varied between 62.8% (treatment B) and 66.5% (treatment D). While organic matter digestibility ranged from 60.7% (treatment B) to 65.5% (treatment D). However, statistical analysis indicated that there was no significant differences (P>0.05) among the treatments. In conclusion, increasing crude protein content of complete ration from 10% to 17.5% did not give a significant benefits in terms of dry matter and organic matter digestibility of complete ration for marica goat. Keywords: Marica Goat, Dry Matter and Organic Matter Digestibility, Complete Ration.