Judul: Effect of Cage Density on Performance of Fast Feathering Black Kedu Chickens at 0-8 Weeks of Age
Abstrak: Ayam kedu hitam merupakan salah satu ayam lokal Indonesia. Terdapat ayam Kedu hitam berbulu cepat (fast feathering) di PT. Sumber Unggas Indonesia, yang berlokasi di Bogor Jawa Barat. Penelitian ini dilakukan untuk mengetahui performa ayam kedu hitam berbulu cepat terhadap kepadatan kandang yang berbeda. Sebanyak 1.728 ekor anak ayam umur 1 hari (DOC), yang ditempatkan dalam 3 kandang berlantai sekam dengan kepadatan yang berbeda. Penelitian ini menggunakan rancangan acak kelompok (RAK) dengan 3 kepadatan kandang yang berbeda (K1 7 ekor/m², K2 8 ekor/m² dan K3 9 ekor/m²). Variabel yang diamati adalah konsumsi pakan, konversi pakan, bobot badan, pertambahan bobot badan dan mortalitas. Data dianalisis secara deskriptif dan secara statistik dengan analisis sidik ragam (ANOVA). Hasil penelitian menunjukkan kepadatan kandang tidak berpengaruh nyata (P>0,05) terhadap semua perlakuan untuk bobot badan, pertambahan bobot badan, konsumsi pakan, konversi pakan dan mortalitas. Namun rataan bobot badan akhir dengan perlakuan kepadatan K1 (687,4 g) menunjukkan bobot badan paling tinggi dibandingkan dengan perlakuan K2 dan K3 berturut-turut 644,8 g dan 636,5 g. Kata kunci: Ayam kedu hitam, berbulu cepat, kepadatan kandang, performa, Black Kedu chicken is one of the local Indonesian chickens. PT. Sumber Unggas Indonesia was one of the Indonesian commercial local chickens farms in Indonesia, which was located in Bogor West Java, has developed a fast-feathering black Kedu chicken. Research was carried out to observe performance of the breed confined in cages with different density of population. A total of 1,728 chicks aged one day (DOC), were placed in litter cages with three different densities. The study used a randomized design of groups (RAK) with 3 different cage densities (K1 7 chicks/m², K2 8 chicks/m² and K3 9 chicks/m²). The observed variables were feed consumption, feed conversion, body weight, weight gain and mortality. Data were then analyzed descriptively and statistically with analysis of the variance (ANOVA). The results of the study showed that the cage density treatments had no significant effect (P>0.05) on body weight, weight gain, feed consumption, feed conversion and mortality. However, the average final body weight of chicks in the K1 treatment (687.4 g) showed the highest body weight compared to the K2 and K3 treatments of 644.8 g and 636.5 g respectively. Keywords: Black Kedu chicken, fast feathering, cage density, performance
Keyword: Black Kedu chicken, fast feathering, cage density, performance

Judul: Produktivitas Hasil Persilangan Ayam Kedu dengan Ayam Silangan Sentul Kampung dan Resiprokalnya Umur 0 sampai 12 Minggu.
Abstrak: Local chickens is Indonesian native birds that potential to be developed as commercial chicken. However local chicken has not been maintaned optimally because it has low egg production and slow growth. Therefore, local chicken’s performance need to be improved by reciprocal crossing. This study aimed to evaluate the performance productivity of crossbreed between kedu roosters with sentul-kampung hens and sentul-kampung roosters with kedu hens. The performance of 39 keduSK day old chicks (DOC) and 28 SKkedu day old chicks (DOC) were recorded at 0 until 12 weeks. Measurement were body weight, body weight gain, feed intake, feed conversion ratio and mortality. Based on t test, the result of all variables were not significantly (P> 0.05). However, the present result showed that the KeduSK chicken had heavier body weight and body weight gain than the SKkedu chicken . The feed conversion ratio and mortality of keduSK chicken was better than SKkedu chicken. Feed intake of SKkedu chicken was less than keduSK chicken. Overall, performance of both chickens were same.
Keyword: crossing, kedu chicken, productivity, sentul-kampung 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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