Judul: Tumbuh-kembang kompisisi karkas ayam pedaging galur pedet, cabb, lohmann dan hybro dengan pemberian pakan yang sama
Abstrak: Penelitian bertujuan untuk mempelajari tumbuh-kembang konposisi karkas ayam pedaging galur Pedet, Cobb, Lohmann dan Hybro, dan perbedaan respons tumbuh-kembang antar galur ayan pedaging. Diharapkan hasil penelitian berguna sebagai bahan informasi bagi peningkatan produksi dan kualitas ayam broiler. Bahan penelitian adalah 160 ekor ayan pedaging dari 4 galur yakni Pedet, Cobb, Lohmann, dan Hybro, masing- Ayan di- tinggi ayan dalam macam masing 40 ekor (20 ekor jantan dan 20 ekor betina). pelihara dalam kandang ukuran 1 x 1 x 1 m, dengan kandang dari lantai 60 cm. Tiap kandang diisi 8 ekor sehingga digunakan 20 unit kandang. Ayan ditempatkan kandang secara acak, menurut galur dan jenis kelamin. Kandang percobaan dilengkapi peralatan yakni tempat makan dan minum, induk buatan, penerangan lampu pijar 60 Watt. Ransun yang digunakan adalah ransum komersil produksi Gold Coin Feed Mill. Vaksinasi dilakukan pada umur 4 hari dan minggu untuk mencegah penyakit ND. 4 Air minum diberikan ad libitum. Alat ukur yang digunakan adalah timbangan "Satorius" dengan ketelitian 0.1 g, dan 3 set alat seksi.
Keyword: Animal feeding, karkas ayam, ayam pedagin, galur Pedet, Cobb, Lohman, Hybro

Judul: Pertumbuhan beberapa galur ayam pedaging
Abstrak: Penelitian bertujuan untuk mempelajari sifat pertumbuhan, model kurva pertumbuhan beberapa galur ayam pedaging, kemudian membandingkan model-model yang diperoleh baik antar individu dan jenis kelamin dalam galur yang sama maupun antar galur yang berbeda. Untuk memilih model terbaik bagi kurva pertumbuhan ini dilakukan pemeriksaan galat dengan cara menebarkan tebaran galat pada setiap peubah bebasnya, sedangkan untuk membandingkan model-model yang diperoleh digunakan uji F. Ayam yang diteliti sebanyak 120 ekor yang terbagi dalam tiga galur ayam pedaging, yaitu Hubbard, Arbor Acres dan Indian River di mana masing-masing galur terdiri 40 ekor ayam jenis kelamin jantan dan betina. Ransum yang diberikan kepada tiga galur ayam tersebut susunannya sama. Penelitian ini dilakukan selama 10 minggu dari tanggal 10 Agustus sampai dengan tanggal 14 Nopember 1982.
Keyword: Chicken;, Growth;

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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