Judul: Persentase Karkas dan Pertumbuhan Organ Dalam Ayam Broiler pada Frekuensi dan Waktu Pemberian Pakan yang Berbeda.
Abstrak: Broilers are genetically developed as rapid growing chickens to produce high abundant of meat in a short period. This potency can only be achieved by supporting of good quality of feed and appropriate feeding frequencies. Three different feeding frequencies with five replications were carried out for five weeks involving 135 broiler chickens in farm located in Babakan village, Ciseeng subdistrict, Bogor regency. The treatments were P1 (the feed was given in the morning at 06.00 am by 100%), P2 (the feed was given in the morning at 06.00 am by 50% and another 50% was given in the afternoon at 17.00 pm) and P3 (the feed was given in the morning at 06.00 am by 40%, in daytime at 11.00 am by 20% and in the afternoon at 17.00 pm by 40%). The traits observed were slaughtered weight, percentage of carcass and internal organs (liver, proventriculus, gizzard, small intestine and colon). All data were subjected to analyzes of variance (ANOVA). Income over feed and chick cost (IOFCC) were descriptively analized. The result showed that there were no significant different among treatments on slaughtered weight, percentage of carcass, liver, proventriculus, gizzard, small intestine, large intestine, leght of small intestine and large intestine. The treatment P3 resulted in highest IOFCC.
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Judul: Performance of Broiler in Different Feeding Frequency
Abstrak: Usaha peternakan ayam broiler merupakan salah satu usaha yang potensial untuk menghasilkan daging dan meningkatkan konsumsi protein bagi masyarakat. Faktor yang mempengaruhi keberhasilan usaha ayam broiler adalah pakan (feed), pembibitan (breeding), dan tatalaksana (manajemen). Penghematan biaya pakan merupakan tujuan yang harus dicapai dalam mendapat keuntungan yang maksimal dari hasil produksinya. Frekuensi pemberian pakan yang berbeda akan memberikan hasil performa yang berbeda. Penelitian dilaksanakan di Desa Babakan, Kecamatan Ciseeng, Kabupaten Bogor, Jawa Barat. Penelitian ini menggunakan 135 ekor ayam broiler CP 707umur satu hari Day Old Chick (DOC) tanpa dilakukan pemisahan antara jantan dan betina. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan perlakuan frekuensi pemberian pakan yang berbeda dan lima ulangan. Setiap ulangan terdiri dari 9 ekor ayam.Perlakuan frekuensi pemberian pakan yang diberikan adalah P1 (pakan diberikan pada pagi hari pukul 06.00 WIB sebanyak 100%), P2 (pakan diberikan pada pagi hari pukul 06.00 WIB sebanyak 50% dan sore hari pukul 17.00 WIBsebanyak 50%) dan P3 (pakan diberikan pada pagi hari pukul 06.00 WIB sebanyak 40 %, siang hari pukul 11.00 WIB sebanyak 20%, dan sore hari pukul 17.00 WIBsebanyak 40%). Peubah yang diamati meliputi konsumsi pakan, bobot badan akhir, pertambahan bobot badan, konversi pakan, mortalitas, dan indeks performa (IP). Hasil penelitian menunjukkan bahwa performa ayam broiler tidak berbeda nyata pada semua peubah. Perlakuan P3 memberikan keuntungan ekonomi lebih baik.
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Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4