Judul: Evaluation of Feed Nutrient Adequacy in Free Range Maintenance System on IPB-D1 Chicken Composition
Abstrak: Sistem free-range merupakan sistem umbaran agar ternak merasa nyaman dan tidak stres. Penelitian ini bertujuan mengevaluasi kecukupan nutrisi pakan pada sistem pemeliharaan free-range terhadap komposisi karkas ayam IPB-D1 di Sinar Harapan Farm umur 11 minggu yang telah dipelihara selama 6 minggu. Sampel yang digunakan yaitu 20 ekor ayam IPB-D1 (9 ekor jantan, 11 ekor betina) diambil secara porpusive sampling dari 110 ekor. Data penelitian dianalisis secara deskriptif menyajikan data rata-rata dan standar deviasi. Variabel yang diukur dalam penelitian ini bobot potong, persentase karkas, persentase potongan komersial dan persentase potongan non-karkas. Hasil penelitian menunjukan bobot potong jantan lebih besar dibandingkan betina, nilai rata-rata sebesar 900,33 g dan 869,73 g. Ratarata karkas jantan 56,44% dan betina 53,57%. Persentase non karkas jantan dan betina dengan pemeliharaan free range 33,64% dan 35,72%. Simpulan penelitian yaitu pemeliharaan sistem free range pada karkas dan potongan komersial ayam IPB-D1 mengandung mineral Fe tinggi dibandingkan daging ayam broiler., The free-range system is an umbrella system so that livestock feel comfortable and not stressed. This study aimed to evaluate the adequacy of feed nutrition in the free-range rearing system on the carcass composition of 11-weekold IPB-D1 chickens at Sinar Harapan Farm that have been reared for 6 weeks. The samples used in this study were 20 IPB-D1 chickens (9 males, 11 females) taken by porpusive sampling from 110 chickens. The research data were analyzed descriptively presenting the average data and standard deviation. The variables measured in this study were slaughter weight, carcass percentage, percentage of commercial cuts and percentage of non-carcass cuts. The results showed that the slaughter weight of males was greater than females, with an average value of 900.33 g and 869.73 g, respectively. The average carcass of males was 56.44% and females 53.57%. The percentage of non-carcass males and females with free range maintenance is 33.64% and 35.72%. The conclusion of the study was that the maintenance of a free range system on carcasses and commercial cuts of IPB-D1 chickens contain high Fe minerals compared to broiler meat.
Keyword: carcass, IPB-D1 Chicken, Free range

Judul: Analysis of Carcass Weight and Commercial Cuts Percentage of IPB-D1 Chickens Reared on a Free-Range System.
Abstrak: Ayam IPB-D1 merupakan rumpun baru lokal komposit yang memiliki keunggulan lebih dari tetuanya. Pemeliharaan ayam ini dilakukan dengan sistem free-range untuk mengurangi tingkat stres. Penelitian ini bertujuan menganalisis persentase bobot karkas dan potongan komersial ayam IPB-D1 umur 12 minggu dengan pemeliharaan sistem free-range di UP3J Fakultas Peternakan IPB. Bahan yang digunakan terdiri dari masing-masing 15 ekor ayam IPB-D1 setiap jenisnya. Data pada penelitian ini dianalisis secara deskriptif untuk membandingkan persentase bobot karkas ayam jantan dan ayam betina. Ayam IPB-D1 jantan dan betina memiliki bobot potong sebesar 901,33 g dan 639,13 g. Persentase bobot karkas ayam IPB-D1 jantan dan betina berturut-turut sebesar 59,82% dan 57,42%. Persentanse bobot karkas ini tidak menunjukkan perbedaan yang nyata antara jantan dan betina, namun terdapat perbedaan yang nyata pada persentase bobot potongan komersial bagian paha atas, paha bawah, dan bagian ceker. Ayam IPB-D1 jantan memiliki persentase bobot potongan komersial lebih tinggi daripada ayam IPB-D1 betina free-range., IPB-D1 chicken is a new local composite breed that has superiority compared to its predecessor. The chickens were reared with a free-range system to lower the stress level. The aim of this study is to analyze the carcass weight and commercial cuts percentage of 12-week-old IPB-D1 chickens which was reared on a free-range system UP3J Faculty of Animal Science, IPB University. The materials that were used were 15 IPB-D1 chickens for each sex. Data was analyzed descriptively to compare the carcass weight percentage of female and male chickens. Male and female IPB-D1 chickens had slaughter weight of 901,33 g and 638,12 g respectively. The carcass weight percentages of male and female IPB-D1 chickens carcasses were 59,82% and 57,42% respectively. The carcass weight percentage of 12-week-old IPB-D1 chickens reared on a free-range system didn’t show significant difference between males and females. But, there were significant differences on the commercial cuts namely, thigh, drumstick, and feet. Male IPB-D1 chickens had a higher commercial cut weight percentage than the females in free-range.
Keyword: Carcass weight, Commercial cut percentage, Free-range, IPB-D1 chicken

Judul: Formulasi Hamiltonian untuk Menggambarkan Gerak Gelombang Soliter Dimensi Tiga di Permukaan Laut
Abstrak: Gelombang permukaan adalah gelombang yang terjadi perbedaan rapat massa antara air dan udara. Salah satu gelombang permukaan yang ditinjau adalah gelombang soliter. Formulasi gelombang soliter dilakukan dengan menggunakan formulasi Hamiltonian.
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