Judul: Pemanfaatan Buah Api-Api (Avicennia officinalis, Linn) dalam Ransum Ayam Pedaging Ditinjau dari Penampilannya
Abstrak: Penelitian ini dilakukan di Bagian Unggas, Jurusan Ilmu Nutrisi dan Makanan Ternak, Fakultas Peternakan, Istitut Pertanian Bogor, selama dua bulan , mulai tanggal 12 Agustus 1985 samapai dengan tanggal 8 oktober 1985. Tujuan penelitian adalah mencari alternatif bahan makanan berasal tanaman pantai, yang dapat digunakan dalam tansum ayam pedaging dan pengaruh penggunaan buah api-api digunakan buah api-api dalam Penelitian adalah : R1 (tanpa buah api-api), R2 (Buah api-api 3%), R3 (Buah api-api 6%), R4 (buah api-api 9%), R5 (buah Api-api 12%), R6 (buah api-api 15%). Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap dengan taraf penggunaan buah api-api merupakan perlakuan dengan masing-masing empat ulangan.
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Judul: Subtitusi jagung dengan gaplek berkulit atau tanpa kulit serta penambahan mineral dan vitamin B12 terhadap performance ayam broiler
Abstrak: Penelitian ini dilakukan di Bagian Unggas, Jurusan Ilmu Nutrisi dan Makanan Ternak, Fakultas Peternakan, Institut Pertanian Bogor, selama dua bulan, mulai tanggal 12 A- gustus 1985 sampai dengan tanggal 8 Oktober 1985. Tujuan penelitian adalah mencari alternatif bahan makanan berasal tanaman pantai, yang dapat digunakan dalam ransum ayam pedaging dan pengaruh penggunaan buah api-api itu sendiri terhadap penampilan ayam pedaging. Taraf peng- gunaan buah api-api dalam penelitian adalah: R1 (tanpa buah api-api), R2 (buah api-api 3%), R3 (buah api-api 6%), R4 (buah api-api 9%), R5 (buah api-api 12%), R6 (buah api- api 15%). Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap dengan taraf penggunaan buah api-api merupakan perlakuan dengan masing-masing empat ulangan. Hasil yang diperoleh sebagai berikut: Pertambahan bobot badan selama penelitian per ekor 1950.13 gram (R1), 1994.55 gram (R2), 1852.38 gram (R3), 1855.13 gram (R4), 1768.63 gram (R5), 1755.00 gram (R6). Rata-rata. konsumsi ransum selama penelitian per ekor 4508.58 gram (R1), 4510.40 gram (R2), 4559.51 gram (R3), 4534.67 453 gram (R4), 4558.33 gram (R5), 4588.10 gram (R6). Rata-rata konversi ransum 2.2019 (R1), 2.1765 (R2), 2.3385 (R3), 2.3394 (R4), 2.4536 (R5), 2.4 2.4793 (R6). Bobot akhir rata-rata yang dica- pai per ekor 1992.75 gram (R1), 2021.33 gram (R2), 1894.75 gram (R3), 1900.11 gram (R4), 1811.13 gram (R5), 1797.50 gram (R6). Rata-rata konsumsi air minum selama penelitian per ekor 131.05.91 ml (R1), 13456.64 ml (R2), 12411.23 ml (R3), 13094.61 ml (R4), 12333.97 ml (R5), 12867.33 m1 (R6). Mortalitas yang terjadi selama penelitian sebesar 7.5% (R2) dan 5.0% (R4). Hasil analisis statistik konsumsi ransum setiap perla- kuan memperlihatkan perbedaan tidak nyata (P70.05). Untuk pertambahan bobot badan, ransum. Ri dau R2 dengan ransum lain sangat nyata (P/ 0.01) lebih tinggi, Untuk konversi ransum, ransum R1, R2 dan R3 sangat nyata (P/ 0.01) lebih baik bila dibanding ransum lain. Sedang untuk konsumsi air minum setiap perlakuan memperlihatkan perbedaan tidak nyata (P 70.05)…
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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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