Judul: Perbandinagn Pengaruh Penggantian Sebagian Tepung Ikan Dengan Beberapa Tingkat Penambahan Methionine Dalam Ransum Terhadap Performans Ayam Broiler
Abstrak: Praktek keterampilan ini dilakukan ....
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Judul: Penampilan Ayam Broiler Terhadap Ransum Tepung Gaplek Sebagai Sumber Energi dan Penambahan Methionin
Abstrak: Penelitian ini dilakukan di Jurusan Imu Nutrisi dan Makanan Ternak, Fakultas Peternakan, Institut Pertanian Bogor, selama enam minggu sejak 19 November sampai dengan 31 Desember 1985. Tujuan penelitian ini adalah untuk mempelajari pe- ngaruh penambahan methionin pada ransum yang mengandung tepung gaplek asal terhada asal ubi kayu pahit sebagai sumber energi terhadap penanpilan ayam pedaging. Dalam penelitian ini digunakan ayam umur sehari strain Arbor Acres CP 707 campur sebanyak 100 ekor. Ran- sum yang digunakan ada lima macam yaitu Ox tepung gaplek (K), 20% tepung gaplek (G20), 30% tepung gaplek (G30), 20% tepung gaplek + 0.2% methionin (G20M) dan 30% tepung gaplek + 0.3% methionin (G30M). Bahan makanan untuk me- nyusun ransum dalam penelitian ini adalah jagung kuning, gaplek, bekatul, bungkil kedelai, bungkil kelapa, tepung ikan, tepung kerang, minyak kelapa, premix A dan methio- nin. Bahan makanan tersebut digiling dan dicampur sesuai dengan lima jenis ransum penelitian. Ransum dan air mi- num diberikan secara ad libitum. Rancangan percobaan yang digunakan yaitu rancangan acak lengkap (RAL) dengan lima perlakuan dan empat ulang- an. Setiap ulangan terdiri dari lima ekor ayam. Pe Penga- ruh perlakuan dilakukan dengan uji F dan perbedaan antar perlakuan digunakan uji Banding Orthogonal. kut : Dari hasil penelitian diperoleh hasil sebagai beri- 1. Tingkat tepung gaplek dan penambahan methionin berpe- ngaruh nyata terhadap pertambahan bobot badan (P0.05). 2. Tingkat tepung gaplek dan penambahan methionin tidak berpengaruh nyata terhadap konsumsi ransum. 3. Tingkat tepung gaplek dan penambahan methionin tidak berpengaruh nyata terhadap konversi ransum. Dari hasil penelitian ini dapat diambil kesimpulan...
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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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