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 Komposisi Tubuh dan Karkas Ayam Broiler
Abstrak: Penelitian untuk mempelajari pengaruh penggunaan minyak kelapa dan minyak jagung ke dalam ransum terhadap komposisi tubuh dan karkas ayam broiler, dilaksanakan di Jurusan Ilmu Nutrisi dan Makanan Ternak Unggas, Fakultas Peternakan, Ins- titut Pertanian Bogor. Lama penelitian adalah 6 minggu un- tuk pemeliharaan dan 2 minggu untuk pemotongan dan pengurai- an karkas dan komponennya. Pelaksanaan penelitian mulai bu- lan September sampai Oktober 1984. Seratus limapuluh ekor doc broiler jantan CP 707, digu- nakan dalam penelitian ini. Ayam dibagi menjadi 3 kelompok untuk 3 perlakuan. Masing-masing kelompok dibagi menjadi group, sebagai ulangan. Pembagian dilakukan secara acak. 5 Tiga macam ransum sebagai perlakuan, ransum A tanpa pe- nambahan minyak, B dengan penambahan minyak kelapa dan C de- ngan penambahan minyak jagung, masing-masing sebanyak 3 per- sen. Ransum disusun dari bahan yang sama. Komposisi menun- jukkan lemak, protein dan bahan ekstrak tanpa N masing-masing 6.29, 21.92 dan 47.57 persen untuk A: 8.74, 20.37 dan 46.71 persen untuk B dan 5.73, 20.63 dan 49.23 persen untuk C. Ransum dan air minum diberikan ad libitum. Pada akhir pemeliharaan 10 ekor dari setiap perlakuan diambil secara acak, dipuasakan terhadap ransum selama 12 jam, kemudian di- potong dan diuraikan. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL), Analisa peragam model Y Ti a xb digunakan untuk mempelajari pengaruh perlakuan terhadap karkas dan komponennya. Hasil penelitian menunjukkan bahwa rataan bobot potong ayam broiler dari perlakuan A, B dan C masing-masing sebesar 1462.5, 1492.0 dan 1435.0 g dengan persentase bobot tubuh kosong 98.61, 98.80 dan 98.77 persen. Persentase karkas se- gar yang dihasilkan masing-masing perlakuan adalah 66.3, 66.4 dan 67.3 persen terhadap bobot potong sedangkan persentase karkas segar terhadap bobot tubuh kosong adalah 67.3, dan 68.1 persen. 67.2 Rataan bobot karkas dingin bagian kiri yang dihasilkan masing-masing perlakuan adalah 75.5, 494.5 dan 478.0 g. Persentase...
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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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