Judul: Substitusi rumput dengan sabut sawit  dalam ransum pertumbuhan domba  : pengaruh amoniasi, defaunasi dan suplementasi  analog hidroksi metionin serta asam amino bercabang
Abstrak: Sabut sawit mempunyai potensi yang cukup besar sebagai sumber pakan serat pada ternak ruminansia namun tergolong pada pakan serat yang bermutu rendah, karena tingginya kandungan lignin. Pemanfaatannya subagai pakan ternak ruminansia belum maksimal. Beberapa teknik pengolahan yang telah dilakukan belum memberikan hasil yang memuaskan terhadap penampilan produksi ternak. Untuk mengoptimalkan penggunaan sabut sawit ini selain pengolahan diperlukan usaha untuk memacu pertumbuhan bakteri didalam men, karena kecernaan pakan serat pada ternak ruminansia sangat tergantung pada enzim-enzim yang dihasilkan oleh bakteri dalam rumen.
Keyword: 

Judul: Pemberian beberapa taraf daun angsana dan substitusinya terhadap daun lamtoro dalam ransum domba
Abstrak: Penelitian ini dilaksanakan mulai dari bulan September sampai Desember 1993 di kandang percobaan dan Laboratorium Nutrisi dan Makanan Ternak, Fakultas Peternakan, Institut Pertanian Bogor. Penelitian ini bertujuan untuk mendapatkan taraf pemberian daun angsana yang optimum dan mendapatkan taraf substitusi daun lamtoro dengan daun angsana. Ternak yang digunakan adalah domba jantan muda, masing-masing untuk tiap pengamatan 15 ekor. Rancangan yang digunakan adalah Rancangan Acak Kelompok dengan tiga kelompok ternak (sebagai ulangan) dan lima ransum perlakuan untuk tiap pengamatan. Semua ransum disusun sesuai dengan kebutuhan domba jantan muda ram lambs yang direkomendasikan NRC (1985). Setiap ransum mengandung Angsana dalam taraf yang berbeda dan dicampur dengan bahan pakan lain untuk dibentuk pellet. Lima ransum pengamatan taraf daun angsana dalam ransum terdiri dari 0, 10, 20, 30 dan 40% daun angsana, dan lima ransum substitusi lamtoro dengan daun angsana terdiri dari 40+0, 30+10, 20+20, 10+30% daun lamtoro dan angsana. Peubah-peubah yang diamati ada- lah: konsumsi bahan kering, kecernaan semu bahan kering dan protein kasar, ekskresi nitrogen melalui feses dan urine, retensi nitrogen, konversi ransum, pertambahan bobot badan, efisiensi penggunaan protein (PER), dan analisis biaya ransum. Hasil yang diperoleh pada pengamatan taraf daun angsana dalam ransum sampai 40% menunjukkan bahwa kecernaan semu bahan kering dan protein kasar, ekskresi nitrogen feses, konversi ransum, pertambahan bobot badan dan efisiensi penggunaan protein tidak berbeda nyata melalui Analisis Sidik Ragam dan Uji Jarak Duncan (P>0.05). Konsumsi bahan kering, retensi nitrogen nyata menurun, sedang ekskresi nitrogen urine kuadratik (P<0.01). Pada pemberian daun angsana sampai taraf 40%, pendapatan dikurangi biaya ransum (IOFC) bernilai positif.
Keyword: 

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.
Keyword: