Judul: Respons ayam broiler terhadap ransum yang mengandung minyak kelapa sawit kasar dan dedak pengganti energi jagung
Abstrak: Penelitian telah dilakukan di Fakultas Peternakan Institut Pertanian Bogor, untuk mengetahui respons ayan broiler terhadap ransun yang mengandung minyak kelapa sawit kasar dan dedak pengganti energi jagung. Percobaan menggunakan rancangan acak lengkap dengan empat perlakuan dan lina ulangan. Adapun perlakuan perlakuan yang dicobakan adalah : …dst
Keyword: Poultry feeding, Broiler, Ransum, Karkas ayam

Judul: Pengaruh penggunaan minyak kelapa dan minyak jagung dalam ransum terhadap performans ayam broiler
Abstrak: Penelitian untuk mempelajari pengaruh penggunaan minyak nabati dalam ransum terhadap performans ayam broiler, dilaksanakan di Jurusan Ilmu Nutrisi dan Makanan Ternak Unggas, Fakultas Peternakan, Institut Pertanian Bogor, pada tanggal 14 September sampai dengan 26 Oktober 1984. Penelitian menggunakan 150 ekor anak ayam umur sehari (doc) broiler jantan strain CP 707 Arbor Acres. Anak ayam tersebut dibagi menjadi 3 kelompok sesuai dengan jumlah perlakuan. Masing-masing kelompok terdiri atas 5 group dan masing-masing group terdiri atas 10 ekor. Pembagian menjadi kelompok dan group dilakukan secara acak dengan menggunakan "random number''. Perlakuan terdiri atas ransum A sebagai kontrol tanpa minyak, ransum B dengan 3 persen minyak kelapa dan ransum C dengan 3 persen minyak jagung. Semua ransum mempunyai kadar energi metabolis dan kadar protein yang sama. Selama penelitian, ransum dan air minum diberi kan ad libitum. Penelitian dilaksanakan dalam rancangan acak lengkap, dan pengaruh perlakuan terhadap parameter yang diukur dipelajari dengan sidik ragam. Parameter performans adalah pertumbuhan, konsumsi dan konversi ransum, konsumsi air minum, mortalitas dan "income over feed and chick cost". Hasil penelitian menunjukkan bahwa pengaruh perlakuan tidak nyata terhadap pertambahan bobot badan, bobot akhir, konsumsi ransum, konver- si ransum dan konsumsi air minum. Rataan pertambahan bobot badan yang dihasilkan selama penelitian untuk masing-masing perlakuan A, B dan C adalah sebesar 1322.38, 1328.82 dan 1291.92 gram. Rataan hobot akhir perlakuan A, B dan C masing-masing sebesar 1364.00, 1369.94 dan 1334.34 gram dengan koefisien keragaman sebesar 4.18, 4.57 dan 4.15 persen. Rataan konsumsi ransum selama penelitian untuk masing-masing perlakuan A, B dan C adalah sebesar 2374.47, 2366.52 dan 2287.98 gram. Rataan konversi ransum masing-masing perlakuan A, B dan C adalah sebesar 1.80, 1.78 dan 1.77. Rataan konsumsi air minum masing-masing perlakuan A, B dan C adalah sebesar 5512.44, 5823.24 dan 5517.84 ml. "Income over feed and chick cost yang dihasilkan dari masing- masing perlakuan A, B dan C adalah sebesar Rp 178.028, Rp 188.314 dan Rp 129.489 per ekor ayam. Nilai mortalitas selama penelitian adalah sebesar 5.2 persen…
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Judul: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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