Judul: Evaluation of Feeding Different Nutrient Content and Zn Supplementation on Reproductive Tracts and Production of Follicles for Strain Candidate of IPB-D2.
Abstrak: Penelitian ini dilakukan di laboratorium lapang kandang C yang terletak di kampus IPB University. Rancangan yang digunakan yaitu RAL pola faktorial 2×2 dengan 4 perlakuan dan 5 ulangan dengan 10 ekor ayam per ulangan. Perlakuan terdiri dari: nutrien menurut Lohmann dengan 0 ppm Zn (P0Zn0), nutrien menurut Lohmann dengan 120 ppm Zn (P0Zn120), nutrien menurut Lohmann <10 % dengan 0 ppm Zn (P1Zn0) dan nutrien menurut Lohmann <10 % dengan 120 ppm Zn (P1Zn120). Variabel yang diamati adalah persentase berat dan panjang infundibulum, magnum, isthmus, uterus dan vagina serta persentase berat dan jumlah folikel kuning telur. Hasil penelitian menunjukkan bahwa pemberian ransum sesuai rekomendasi Lohmann yang disuplementasi Zn 120 ppm dapat meningkatkan presentase bobot magnum, uterus, folikel kuning kecil, putih besar dan warna putih kekuningan serta jumlah folikel kuning matang paling tinggi pada calon galur ayam IPB-D2. Kata kunci: ayam, folikel kuning telur, IPB-D2, Lohmann, standar nutrien., This research was carried out in the C cage field laboratory located on the IPB University campus. The design used was a CRD with a 2×2 factorial pattern with 4 treatments and 5 replications with 10 chickens per replication. The treatments consisted of: nutrient requirements according to Lohmann with 0 ppm Zn (P0Zn0), nutrient according to Lohmann with 120 ppm Zn (P0Zn120), nutrient according to Lohmann <10% with 0 ppm Zn (P1Zn0) and nutrient according to Lohmann <10% with 120 ppm Zn (P1Zn120). The variables observed were the percentage of weight and length of the infundibulum, magnum, isthmus, uterus and vagina as well as the percentage of weight and number of yolk follicles. The results showed that the ration according to Lohmann's recommendation supplemented with 120 ppm Zn could increase the percentage of magnum weight, uterus, small yellow follicle, large white and yellowish white color and the highest number of mature yellow follicles in the prospective chicken strain IPB-D2. Keywords: chickens, IPB-D2, Lohmann, nutrient standard, yolk follicle.
Keyword: chickens, IPB-D2, Lohmann, nutrient standard, yolk follicle

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: : Persamaan Tunggal sebagai Representasi Kurva Komposit
Abstrak: A mathematical method is introduced to represent a composite curve based on an extension of analytic geometry. The representation is given either with a single equation or with two equations, in the case of parametric representation. This method permits the representation of composite curves in similar manner to the conventional representation of non-composite curves. Some mathematical tools, including Heaviside unit step function and periodizer function, are used in the establishment of a single equation. In this paper, regular equations of regular and irregular polygon, as well as composite curves of two dimensions, are implemented using a computer algebraic system, Mathematica.
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