Judul: Pengaruh Berbagai Metoda Vaksinasi Terhadap Konsumsi Ransum. Konversi, Ransum, Dan Konsumsi Air Minum Ayam Broiler
Abstrak: Dlam peningkatan produksi ternak unggas, pada pronsipnya ada tiga faktor utama yang harus diperhatikan yaitu makna, tatalaksana, dan pemuliaan ternak. Salah satu aspek tatalaksana ternak unggas adalah pencegahan terhadap penyakit-penyakit menular. Hal ini penting dilaksanakan dalam intensifikasi ternak unggas, karena resiko yan diakibatkan penyakit menular sangat besar.
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Judul: Pengaruh Beberapa Macam Antibiotika Terhadap Penampilan Produksi, Konsumsi Air Minum Dan ransum Pda Ayam Petelur Medium Galur Hisex Brown
Abstrak: Penelitian ini dilakukan di Laboratorium Ilmu Produksi Ternak Unggas, Jurusan Ilmu Produksi Ternak, Fakultas Peternakan, Institut Pertanian Bogor, mulai tanggal 5 Oktober 1985 sampai dengan tanggal 28 Februari 1986. Tujuan penelitian ini adalah untuk mengetahui seberapa besar pengaruh beberapa macam antibiotika terhadap produksi telur, massa telur, konsumsi ransum, konversi ransum, konsumsi air minum serta perbandingan konsumsi air minum dengan konsumsi ransum pada ayam petelur galur Hisex Brown. Penelitian ini menggunakan Rancangan Acak Kelompok, dengan deretan kandang sebagai kelompok. Perlakuan yang digunakan adalah: (T₁) ransum dengan tambahan kitasamisin dan kolistin masing-masing sebesar 5 dan 1.5 ppm, (T₂) ransum dengan tambahan kitasamisin dan kolistin masing- masing sebesar 10 dan 3 ppm, (T3) ransum dengan tambahan zink basitrasin sebesar 100 ppm, (T) ransum dengan tambahan spiramisin sebesar 25 ppm, (T5) fansum dengan tambahan oksitetrasiklin sebesar 50 ppm dân (Tg) ransum tanpa mendapat tambahan antibiotika (kontrol). Ayam petelur yang digunakan adalah ayam petelur galur Hisex Brown sebanyak 864 ekor dengan masing-masing perlakuan pada setiap kelompok 48 ekor. Hasil penelitian menunjukkan bahwa penambahan beberapa macam antibiotika tidak nyata memperbaiki produksi telur, massa telur dan efisiensi ransum. Penambahan beberapa macam antibiotika dalam ransum tidak nyata berpengaruh terhadap konsumsi ransum, konversi ransum, konsumsi air minum serta perbandingan konsumsi air minum dengan konsumsi ransum.
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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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