Judul: Kombinasi Gaplek, Daun Singkong, Daun Lamtoro dan Daun Gamal sebagai Substitusi Jagung dalam Ransum Ayam Pedaging serta Pengaruhnya terhadap Karkas dan Komponen Tubuh
Abstrak: Pada kesempatan ini penulis mengucapkan terima kasih kepada bapak Drh. Baihaqi H. Ahmad sebagai dosen pembimbing utama dan bapak Drh. Rachmat Eerman MVSc sebagai dosen pembimbing anggota yang telah banyak memberi pengarahan dan saran-saran selama penulis melakukan penelitian dan penyusunan Karya Ilmiah ini. Penulis juga menyampaikan penghargaan yang setinggi-tingginya kepada seluruh staf pengajar yang telah memberikan bekal selama penulis menuntut ilmu pada Fakultas Peternakan, Institut Pertanian Bogor.
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Judul: Campuran Gaplek, Daun Singkong, Daun Lamtoro Dan Daun Gamal Sebagai Pengganti Jagung Dalam Ransum Untuk Penampilan Ayam Broiler
Abstrak: Penelitian untuk mempelajari pengaruh substitusi jagung dengan campuran gaplek, tepung daun singkong, daun lamtoro dan daun gamal terhadap penampilan ayam broiler, dilaksanakan di Laboratorium Ilmu Nutrisi dan Makanan Ternak Unggas, Fakultas Peternakan, Institut Pertanian Bogor, pada tanggal satu Juli sampai dengan 11 Agustus 1986. Penelitian menggunakan 250 ekor anak ayam umur sehari (DOC) broiler jantan dan betina strain CP-707. Anak ayam tersebut dibagi menjadi lima kelompok sesuai dengan jumlah perlakuan. Masing-masing kelompok terdiri atas lima ulangan dan masing-masing ulangan terdiri atas 10 ekor. Pembagian menjadi kelompok dan ulangan dilakukan secara acak dengan menggunakan random number. Perlakuan terdiri atas R-1 sebagai ransum komersial, R-2 sebagai kontrol tanpa campuran gaplek, daun singkong, daun lamtoro dan daun gamal, R-3 dengan 15% campuran gaplek, daun singkong, daun lamtoro dan daun gamal, R-4 dengan 30% campuran gaplek, daun singkong, daun lamtoro dan daun gamal dan R-5 dengan 45% campuran gaplek, daun singkong, daun lamtoro dan daun gamal. Semua ransum mempunyai kadar energi metabolis dan kadar protein yang sama. Selama penelitian, ransum dan air minum diberikan ad libitum. Penelitian dilaksanakan dalam rancangan acak lengkap dan pengaruh perlakuan terhadap peubah yang diukur dipelajari dengan sidik ragam. Peubah penampilan adalah pertumbuhan, konsumsi dan konversi ransum, bobot badan akhir, mortalitas dan income over feed and chick cost. Hasil penelitian menunjukkan, bahwa pengaruh perlakuan sangat nyata (p/ 0.01) terhadap pertambahan bobot badan, bobot akhir, konsumsi dan konversi ransum. Rataan pertambah- an bobot badan yang dihasilkan selama penelitian untuk masing-masing perlakuan R-1, R-2, R-3, R-4 dan R-5 adalah sebesar 1 361.50, 987.56, 1 079.44, 992.90, 917.42 gram. Rataan bobot akhir perlakuan R-1, R-2, R-3, R-4 dan R-5 masing-masing sebesar 1 399.50, 1 023.40, 1 117.19, 1 034.27 dan 956.47 gram dengan koefisien keragaman 10.68,29.05, 16.07,21.22 dan 15.48 %. Rataan konsumsi ransum selama penelitian untuk masing-masing perlakuan R-1, R-2, R-3….dst
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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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