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: Pola Pertumbuhan Ayam Kub-2 Berbulu Cepat (Fast Feathering) Umur 1-8 Minggu yang dipelihara dengan dengan Kepadatan Kandang Berbeda
Abstrak: Fast-feathering KUB2 (KUB2ff) chicken is one of breed of Indonesia local chickens, selected for egg production, which has had potential to be improved further. Egg production capacity more or less is influenced by the growth pattern of its juvenile. Therefore, base data and growth pattern of the breed is necessary in order to predict growth at certain ages. The study was aimed to evaluate growth pattern of KUB2ff chicken at the ages of 1-8 week, managed under different litter cage densities (K1: 9 chicks/m-2 , K2: 14 chicks/m-2 dan K3:15 chicks/m-2 ). The research was conducted at Sumber Unggas Indonesia Farm, at Bogor, West Java. Variables observed were gain of bodyweight, feed consumption, feed conversion ratio and loss. Gompertz growth model was used to predict growth pattern of KUB2ff chicken. Results showed that cage density significantly affected (P<0.05) bodyweight, bodyweight gain. and, but not feed consumption, feed conversion ratio and population loss (P>0.05). The highest bodyweight gain was showed by group of chickens at age of 6-8 weeks, managed under K2 (density of 14 chicks/m2 ). Feed conversion ratio of group in K3 was lower than the group in K1 and K2. Growth pattern of KUB2ff chickens under low density cage was faster than of KUB2ff under high density cage. At the age of 1-8 weeks, all the groups did not show the inflection point, indicating that the chicken was still in starting growing period. The research concluded that cage density influenced 8-week bodyweight, 6-8- bodyweight gain of the KUB2ff chicken, but not feed consumption, feed conversion ratio and loss, whilst growth of the chicken at the age of 1-8 weeks did not show an inflection point. It is suggested to do further research to see inflection point of the growth curve of the KUB2ff chicken, Ayam KUB-2 berbulu-cepat (KUB2bc), merupakan salah satu bangsa ayam lokal Indonesia yang sudah diseleksi untuk produksi telur, namun masih memungkinkan produksi telurnya untuk ditingkatkan. Kapasitas produksi telur sedikit banyak dipengaruhi pola pertumbuhan masa mudanya (juvenile). Oleh karena itu, untuk pengembangan pemuliaan lebih lanjut, diperlukan data dasar pola pertumbuhan untuk memprediksi bobot badan pada umur-umur tertentu. Penelitian ini mengkaji pola pertumbuhan ayam KUB2bc umur 1-8 minggu yang dipelihara dalam kandang litter dengan kepadatan kendang yang berbeda (K1: 9 ekor/m2 , K2: 14 ekor/m2 dan K3:15 ekor/m2 ). Penelitian dilakukan di PT Sumber Unggas Indonesia, Bogor, Jawa Barat. Variabel yang diamati dalam penelitian ini adalah bobot badan, pertambahan bobot badan, konsumsi pakan, konversi pakan, dan kehilangan populasi (loss). Model Gompertz non linier digunakan untuk memprediksi pola pertumbuhan ayam KUB2bc. Hasil penelitian menunjukan bahwa kepadatan kandang berpengaruh nyata (P<0,05) terhadap bobot badan umur 8 minggu dan pertambahan bobot badan umur 6-8 minggu. Kepadatan kandang tidak berpengaruh nyata (P>0,05) terhadap konsumsi pakan, konversi pakan dan kehilangan populasi (loss). Pertambahan bobot badan paling tinggi pada umur 6-8 minggu ditunjukkan oleh kelompok ayam pada K2. Konversi pakan kelompok ayam pada K3 lebih rendah dari pada K1 dan K2. Pola pertumbuhan ayam KUB2bc dalam kandang dengan kepadatan rendah, lebih cepat dari pada dalam kandang dengan kepadatan lebih tinggi. Ayam KUB2bc pada umur 1-8
Keyword: KUB2ff chicken, cage density, growth pattern

Judul: Sintesis Krisin dari Floroglusinol
Abstrak: Flavone is a class of flavonoid, widely distributed in vascular plants. Flavones containing hydroxyl groups at 5 and 7 position are quite important regarding their biological activities and their abiquity in nature. Flavone having hydroxyl groups only at position 5 and 7 or 5,7-dihydroxyflavone is known as chrysin. In this study, crude chrysin had been successfully synthesized in 3 steps from phloroglucinol as starting material. Phloroglucinol was acetylated with acetonitrile and HCl gas, resulting phloroacetophenone amount to 74%. Phloroacetophenone benzoylation with 4.5 equivalents of benzoyl chloride produced tribenzoyl phloroacetophenone in 103–107% of yield and the subsequent Baker-Venkataraman rearrangement of the ester by using KOH in dried pyridine produced crude chrysin, with conversion percentage of 71.62%. All synthetic products had been characterized by melting point and spectroscopically.
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