Judul: Pemanfaatan silase onggok basah dengan suplementasi urea dalam ransum pertumbuhan domba lokal
Abstrak: Tujuan Penelitian adalah untuk mendapatkan infarmasi tentang lama fermentasi yang tepat guna menghasilkan silase onggok basah yang terbaik dan untuk mengetahui sejauh mana pemanfaatan silase onggok basah sebagai sumber energi yang mudah tersedia dalam rumen dengan suplementasi urea terhadap pertumbuhan domba lokal. Penelitian dilakukan di Fakultas Peternakan Universitas Andalas Padang dalam dua bagian. Penelitian tentang "Pengaruh Lama Fermentasi Terhadap kondisi silase onggok basah". Penelitian ini dilaksanakan selama ± 2 bulan terdiri atas pembuatan silase onggok 4 minggu dan analisis laboratorium 4 minggu. Penelitian ini menggunakan Rancangan Acak Lengkap dengan 5 perlakuan dan 4 ulangan, sebagai perlakuan- yaitu lama fermentasi 0 minggu (a0), 1 minggu (a1), 2 minggu (a2), 3 minggu(a3) dan 4 minggu (a4). ...
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Judul: Pemanfaatan silase pucuk tebu sebagai sumber hijauan pada ternak domba
Abstrak: Tujuan penelitian adalah untuk mendapatkan informasi tentang pemakaian level onggok yang tepat guna menghasilkan kualitas silase pucuk tebu yang baik dan menguji silase pujuk tebu sebagai sumber hijauan tunggal atau hijauan campuran dengan rumput gajah segar, untuk pertumbuhan ternak domba. Penelitian dilakukan 2 bagian yaitu: bagian satu (I) penelitian tentang "Pengaruh Pemakaian Berbagai Level Onggok Terhadap Kualitas Silase Pucuk Tebu''. Terdapat dua faktor yang diteliti yakni faktor A yang merupakan level onggok yaitu: (a 0 )= 01/. onggok + 1001/. pucuk tebu, a 1 = 151/. onggok + 851/. pucuk tebu, a2 = 301/. onggok + 701/. pucuk tebu, a3 = 451/. onggok + 551/. pucuk tebu dan a4= 601/. onggok + 401/. pucuk tebu, sedangkan faktor ke- 2 (Bl adalah lama fermentasi yaitu : b1 = 1 minggu, b2 = 2 minggu, b3 = 3 minggu, b4= 4 minggu dan b5= 5 minggu. ...
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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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