Judul: Daun ubi kayu dan sorghum masing-masing sebagai pengganti bungkil kedelai dan jagung untuk babi
Abstrak: Tujuan penelitian ini ialah: 1. Mengetahui kemampuan mencerna dan memanfaatkan zat makanan oleh babi jantan dan jantan kastrasi. 2. Mengetahui kecernaan dan pemanfaatan zat makanan ransum yang menggunakan daun ubikayu dan sorghum masing-masing sebagai pengganti bungkil kedelai dan jagung kuning. Digunakan 24 ekor anak babi persilangan, terdiri dari 12 ekor jantan dan 12 ekor jantan kastrasi dengan rata bobot badan awalan 26.09 2.65 kg (koefisien keragaman 10.2%). Penelitian dilaksanakan sebagai percobaan berfaktor 2 x 4, menggunakan rancangan blok terbagi ("Split block) dengan pengelompokan berdasarkan bobot badan awal. Penelitian dilakukan di Fakultas Peternakan Institut Pertanian Bogor, sejak 21 Maret 1984 sampai dengan 9 Mei 1984. Dari penelitian tidak diperoleh perbedaan yang nyata antara babi jantan dan jantan kastrasi, baik dalam hal ke mampuan mencerna maupun memanfaatkan zat makanan ransum. Dilihat dari kecernaan maupun pemanfaatan zat makanan, daun ubi kayu dan sorghum dapat digunakan dalam ransum babi sebanyak 10.4% dan 47.6% untuk mengganti sebagian bungkil kedelai dan seluruh jagung kuning. ...
Keyword: Vegetables legumes, Cassava leaves, Sorghum leaves

Judul: Penggunaan sorghum dan tepung daun ubi kayu masing-masing sebagai pengganti seluruh jagung dan sebagian bungkil kedelai dalam makanan ternak babi jantan kastrasi dan tidak kastrasi
Abstrak: Tujuan penelitian adalah mempelajari dampak pengganaan sorghum dan tepung daun ubi kayu, masing-masing sebagai pengganti seluruh jagung dan sebahagian bungkil kedelai dalam campuran makanan ternak babi jantan kastrasi dan tidak kastrasi baik dari segi bioteknis maupun ekonomis peternakan. Indikator dampak bioteknis peternakan, meliputi konsumsi makanan, laju pertumbuhan yang dinyatakan dalam pertambahan bobot badan mutlak dan relatip, keefisienan penggunaan makanan dan ukuran ketebalan lemak punggung. Indikator dampak ekonomis peternakan, meliputi biaya konsumsi makanan untuk setiap kg pertambahan bobot badan dan pendapatan untuk setiap Rp. 1000,- biaya konsumsi makaan. Penelitian dilakukan selama 8 minggu (dari tanggal 21 Maret sampai dengan tanggal 16 Mei 1984) di kandang milik Bagian Ilmu Produksi Ternak Babi, Fapet, IPB di Bogor. Hewan percobaan adalah ternak babi jantan yang sedang bertumbuh (bangsa persilangan), sebanyak 24 ekor yang terdiri dari babi jantan kastrasi dan tidak kastrasi, masing-masing sebanyak 12 ekor. Rataan bobot badan awal secara keseluruhan sebesar 26,09 ± 2,66 kg.
Keyword: Sorghum;, Green manures;, Zea mays;, Soybeans;, Swine;

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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