Judul: Uji Selera terhadap Bahan Ransum dan Ransum Ayam Broiler Umur Satu Hari Sampai dengan Lima Minggu
Abstrak: Tujuan penelitian ini adalah untuk mempelajari selera makan ayam broiler terhadap beberapa bahan ransum dan ransum komplit. Konsumsi bahan ransum dan ransum, pertambahan bobot badan, konversi ransum, konsumsi air minum, bobot komponen tubuh dan karkas juga dipelajari.
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Judul: Uji Selera Bahan Makanan Pada Ayam Broiler
Abstrak: Suatu penelitian tentang palatabilitas bahan makanan pada ayam broiler, telah dilakukan di Departemen Ilmu Ka- kanan Ternak Fakultas Feternakan, Institut Fertanian Bo- gor, mulai tanggal 31 Desember 1980 sampai dengan tanggal 7 Februari 1981, dengan menggunakan 240 ekor anak ayam strain C.F. 707 dari Peternakan Charoen Fokphand Jakar- ta, yang terbagi atas 3 kelompok masing-masing 80 ekor. Tujuan penelitian ini adalah untuk mengetahui selera makan ayam sehubungan dengan cara penyajian bahan ransum secara kafetaria atau terpisah-pisah dan sebagai uji bio- - logis bahan makanan. Data yang dikumpulkan adalah 1). Jumlah bahan ran- sum yang dihabiskan. 2). Pertambahan bobot hidup, kemudi- an dilakukan analisa sidik ragam dan uji banding ortogo nal. Diperoleh hasil bahwa jagung, dedak, bungkil kelapa tepung ikan, bungkil kedelai, bungkil kacang tanah, ka- cang hijau, mineral masing-masing berturut-turut dikon sumsi (%) 53.52; 2.71; 2.05; 0.45; 27.06; 1.52; 12.59; 0.30. - Fola kesenangan ayam terhadap bahan ransum didapat - kan bahwa jagung lebih disenangi (P<0.01) daripada 7 sisa bahan makanan lainnya, bungkil kedelai lebih disenangi (P<0.01) daripada 6 sisa tahan makanan lainnya, kacang hijau lebih disenangi (F<0.01) daripada 5 sisa bahan ma kanan lainnya. Sedangkan bahan rasum yang menempati 5 uru tan terbawah tidak berbeda palatabilitasnya. - Pansum komplit memberikan hasil pertambahan bobot hidup yang lebih baik (P<0.01) dibandingkan dengan ransum yang disediakan dengan sistem kafetaria. Tidak terdapat perbedaan yang nyata dalam konsumsi bahan kering antara sistem kafetaria dengan ransum yang disediakan komplit. Kansum komplit memberikan efisiensi penggunaan maka. nan yang lebih baik (P<0.05), dibandingkan dengan ayam yang diberi makan dengan sistem kafetaria.
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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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