Judul: Deteksi Status Mineral Pada Ayam Petelur Melalui Pengamatan Kandungan Mineral Telur Dan Biokimia Pada Darah
Abstrak: Serangkaian penelitian telah dilakukan di Fakultas Peternakan Institut Pertanian Bogor, untuk mempelajari metode pendugaan status mineral pada ayam petelur melalui pengamatan penampilan produksi, kandungan mineral telur dan pengamatan biokimia pada darah. Percobaan dilakukan dengan menggunakan Rancangan Acak Lengkap (RAL) terdiri dari empat perlakuan dan tiga ulangan. Tiga macam ransum defisien mineral masing-masing mengandung 25, 50 dan 75 persen dedak padi dan satu macam kepada tujuan ransum komersial sebagai kontrol telah diberikan 168 ekor ayam petelur selama dua bulan, untuk mempelajari pengaruh defisiensi terhadap penampilan produksi, kandungan mineral dengan mineral (Ca, P, Mg, Fe, Cu, Mn, dan Zn) pada kulit telur, kuning telur, serum dan tulang serta aktivitas enzim alkalin fosfatase Percobaan dilanjutkan dengan suplementasi multi mineral selama empat bulan, dengan tujuan untuk mengetahui kemampuan ayam petelur dalam memperbaiki penampilan prouksinya. Hasil yang diperoleh dalam penelitian ini menunjuk- bahwa defisiensi mineral secara nyata dapat menye- kan babkan terjadinya penurunan rataan konsumsi ransum, pro- duksi telur dan bobot telur pada bulan pertama terjadinya defisiensi. Suplementasi mineral dapat meningkatkan kembali rataan konsumsi ransum, produksi telur dan bobot telur, namun proses pemulihan ini memerlukan waktu yang cukup lama,….dst
Keyword: Mineral Status, Laying hens, Egg Mineral Content, Blood Biochemistry

Judul: Organic Mineral Mixed Suplementation in Feed on Isa Brown Laying Hens Performance and Quality 90-97 Weeks
Abstrak: Penelitian ini bertujuan mengevaluasi suplementasi campuran mineral organik dalam pakan pada ayam petelur . Penelitian menggunakan 1444 ekor ayam. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 2 perlakuan dan 11 ulangan. Perlakuan yang digunakan adalah T0 = pakan komersial, dan T1 = pakan komersil + campuran mineral organik. Parameter yang diamati terdiri dari warna kerabang, kekuatan kerabang, ketebalan kerabang, haugh unit, hen day production, konsumsi pakan, bobot telur, dan konversi pakan. Data dianalisis menggunakan uji T. Hasil penelitian berpengaruh nyata meningkatkan hen day production, konversi pakan, konsumsi pakan, warna kerabang, ketebalan kerabang, dan kekuatan kerabang (P <0,05), namun tidak berpengaruh pada bobot telur dan haugh unit (P >0,05). Penerapan suplementasi campuran mineral organik dapat meningkatkan hen day production, konsumsi pakan, konversi pakan, kekuatan kerabang, warna, ketebalan kerabang telur ayam petelur strain Isa Brown, namun belum mampu meningkatkan haugh unit dan bobot telur., This study was aimed to evaluate supplementation of organic mineral mix in feed for Isa Brown hens. The study used 1444 chickens. This study used a completely randomized design (RAL) with 2 treatments and 11 replications. The treatments used were T0 = commercial feed and T1 = commercial feed + organic mineral mixture. Parameters observed consisted of shell color, shell strength, shell thickness, haugh unit, hen day production, feed consumption, egg weight, and feed conversion. Data were analyzed using T test. The results showed that significantly improved hen day production, feed conversion, feed consumption, shell color, shell thickness, and shell strength (P <0,05), but had no effect on egg weight and haugh unit (P >0,05). The application of organic mineral mixture supplementation can increase hen day production, feed consumption, feed conversion, shell strength, color, egg shell thickness of laying hens strain Isa Brown, but has not been able to increase the haugh unit and egg weight.
Keyword: Laying hens final phase of production, Performance

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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