Judul: Pengaruh pemberian lemak sapi dalam ransum yang mengandung beberapa tingkat asam amino esensial dan tingkat protein pada ayam broiler yang dipelihara dengan sistem lantai kawat dan litter
Abstrak: Penelitian ini dilakukan di Bagian Ternak Unggas, Fakultas Peternakan, Institut Pertanian Bogor, mulai dari tanggal 11 Mei sampai dengan tanggal 6 Juli 1982. Tujuan penelitian ini adalah untuk melihat kemungkinan sampai berapa jauh penggunaan lemak sapi di dalam ransum ayam broiler dengan menggunakan sistem lantai kawat dan litter, sehingga tidak menimbulkan efek sampingan atau pengaruh yang buruk terhadap performans ayam broiler. Pada penelitian ini digunakan ayam broiler jenis "Ar- bor Acres, C.P. 707" yang berasal dari P.T.CHAROEN POKPHAND JAYA PARM di Jakarta, sebanyak 280 ekor, kelamin (straight run), umur satu hari. campur Selama penelitian ayam-ayam tersebut dipelihara dalam boke berukuran 1 x 1 x 0,5 m, dimana separuh dari jumlah nyam dipelihara dalam 14 boks beralaskan kawat, pada masing-masing boks ditempatkan 10 ekor anak ayam secara acak, sedangkan sisanya dipelihara di dalam 14 boks beralaskan litter. ...
Keyword: Protein;, Amino acids;

Judul: Pengaruh Asam Amino Dan Imbangan Kalori Protein Dalam Ransum Terhadap Pertumbuhan Ayam Broiler
Abstrak: Penelitian ini dilakukan dari tanggal 2 November sam- pai dengan 27 Desember 1984 di Jurusan Ilmu Produksi Ternak Fakultas Peternakan, Institut Pertanian Bogor. Tujuan penelitian adalah untuk mengetahui pengaruh asam amino dan imbangan kalori protein dalam ransum terha- dap pertambahan berat badan, berat badan akhir, konsumsi ransum, konversi ransum, konsumsi air minum, persentase karkas, persentase lemak abdominal dan "income over feed and chick cost". Dalam penelitian ini digunakan 180 ekor anak ayam broiler umur satu hari jenis CP 707 "final stock". Ayam- ayam tersebut dipelihara dalam box beralas liter yang berukuran 1 x 1 x 1 m. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap dengan tiga perlakuan dan enam ulangan. Tiap ulangan terdiri dari 10 ekor ayam. Ketiga perlakuan tersebut terdiri dari perlakuan R dengan tingkat protein 18% RA dan energi metabolis 3000 kkal/kg ransum, perlakuan Rg dengan tingkat protein 20% dan energi metabolis 3000 kkal/ kg ransum dan perlakuan Rr dengan tingkat protein 23% dan energi metabolis 3000 kkal/kg ransum. Hasil pengujian statistik menunjukkan bahwa pengaruh asam amino dan imbangan kalori protein dalam ransum nyata (P0.05) terhadap pertambahan berat badan, berat badan akhir, konsumsi ransum, konversi ransum. Konsumsi air minum, persentase karkas, persentase lemak abdominal dan "income over feed and chick cost" tidak menunjukkan pengaruh yang nyata. Pertambahan berat badan rata-rata per ekor sampai umur delapan minggu sangat nyata (P0.01) lebih tinggi pada perlakuan R (228.62 gram) dari pada perlakuan Berat badan akhir rata-rata per ekor se (184.82 gram). RA sam pai umur delapan minggu sangat nyata (P0.01) lebih…dst
Keyword: 

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.
Keyword: