Judul: Pengaruh Penambahan Selacid®, Presan®, dan Selko pH® terhadap Persentase Karkas dan Organ Dalam Ayam Broiler.
Abstrak: Tujuan penelitian ini adalah untuk menganalisis pengaruh penambahan Feed Aditive Selacid® dan Presan® pada pakan, dan Selko pH® pada air minum terhadap persentase karkas dan organ dalam ayam broiler strain Cobb. Rancangan penelitian menggunakan rancangan acak lengkap pola faktorial (RAL Faktorial) dengan 2 faktor yaitu penambahan Selko pH® (faktor I) dan penambahan Selacid® dan Presan® pada pakan (faktor II). Penelitian ini menggunakan 10 perlakuan dengan 4 ulangan. Pengukuran parameter menggunakan 1 ekor ayam pada setiap ulangan berumur 21 hari. Penambahan feed aditive dalam pakan dan Selko pH® dalam air minum secara keseluruhan tidak mempengaruhi persentase bobot potongan karkas, organ dalam dan persentase bobot saluran pencernaan ayam broiler umur 21 hari.
Keyword: broiler, feed aditive, organ dalam, persentase karkas

Judul: Pengaruh Pemberian Feed Additive Selacid, Presan, Dan Selko Ph Terhadap Performa Ayam Broiler Strain Cobb
Abstrak: Penambahan asam organik dalam pakan ternak dapat meningkatkan produktifitas ternak. Penelitian bertujuan mengukur pengaruh pemberian feed aditive Selacid, Presan dalam pakan dan Selko ph dalam air minum terhadap perfoma ayam broiler. Penelitian menggunakan rancangan acak lengkap pola faktorial 2 x 3 dengan dua faktor (faktor A adalah A1= pemberian Selko ph dan A2= tanpa pemberian Selko ph, faktor B adalah penambahan feed additive B: B1= kontrol, B2= Selacid dan B3= Presan) dan 4 ulangan. Broiler yang digunakan sebanyak 600 ekor. Pemeliharaan dilakukan selama 35 hari dengan menggunakan kandang litter. Pakan yang diberikan berbeda tiap periode pemeliharaan (periode prestarter dengan kandungan Energi Bruto 3981 kkal kg-1 dan Protein Kasar 22.83%, periode starter dengan kandungan Energi Bruto 4133 kkal kg-1 dan Protein Kasar 22.91%, dan periode finisher dengan kandungan Energi Bruto 3350 kkal kg-1 dan Protein Kasar 22.66%). Peubah yang diamati dalam percobaan ini adalah performa ayam broiler yakni konsumsi pakan, bobot badan, rataan bobot badan, konversi pakan dan mortalitas. Hasil penelitian menunjukan bahwa pemberian Selacid 0.1% atau Presan 0.1% dalam pakan disertai pemberian Selko ph dalam air minum nyata meningkatkan (P<0.05) konsumsi pakan, bobot badan, pertambahan bobot badan, dan menurunkan konversi pakan pada periode pre starter-starter. Pemberian Selacid 0.1% atau Presan 0.1% dalam pakan disertai pemberian Selko ph dalam air minum nyata menurunkan konsumsi pakan, bobot badan, pertambahan bobot badan, dan konversi pakan pada periode finisher dan selama pemeliharaan 1-35 hari. Hasil penelitian menyimpulkan bahwa pemberian Selacid 0.1% dalam pakan disertai pemberian Selko ph dalam air minum, efektif meningkatkan efisiensi penggunaan pakan sebesar 15.5% pada broiler periode pre starter-starer. Pemberian Presan 0.1% dalam pakan dapat meningkatkan efisiensi penggunaan pakan sebesar 1.5%-3% pada broiler periode finisher dan 1-35 hari pemeliharaan. Penggunaan Selko ph 1 ml L-1 dalam air minum dapat meningkatkan efisiensi pakan pada broiler periode prestarter-starer dan selama pemeliharaan 1-35 hari.
Keyword: Broiler, Performa, Presan, Selacid, Selko ph

Judul: Characteristic of Overshooting Top (OT) Based on  Himawari  8  Satellite  as  a  Convective  Cloud  Feature  that  Generates  Extreme Weather in the Java Island Region
Abstrak: Overshooting Top (OT) is a feature at the top of a convective cloud that is associated with extreme weather. Research on OT in tropical Indonesia is still very limited. The existence of geostationary satellites with wide area coverage and fast frequency observations is useful for observing the fast dynamics of the OT life cycle. Therefore, this study intends to analyze the relationship between OT and extreme weather, updraft and thermodynamic conditions of OT when extreme weather occurs, the best objective method for detecting OT in the day time and night time, and the spatiotemporal distribution of OT in the tropical region of Java Island during the 2018-2021 period. Based on visual analysis using visible channel and Himawari 8 sandwich products, 87% of extreme weather events in Java were accompanied by the appearance of OT. It indicates that the presence of the OT pattern is a convection cloud pattern or feature that is closely related to extreme weather events for the Java Island region. The existence of a time lag between the appearance of OT and extreme weather events on Java Island indicates that the OT of convection cloud can be used as a precursor or nowcasting for the appearance of extreme weather. Most of the convective cloud OT features during extreme weather events on Java Island have altitude that were only able to exceed the altitude of the equilibrium level and few were able to exceed the tropopause level of 9 km – 16 km. The difference in atmospheric conditions during extreme weather events on Java Island, which is in the tropics and subtropics, is a strong and unstable convective energy condition characterized by a larger CAPE, as well as unstable KI, LI, SI and TTI values. It is offset by kinematic factors in the form of a weak vertical wind shear (bulk wind shear 0-6 km) and a higher freezing point height. The difference between extreme weather events in the Java Island region and other tropical regions compared to subtropical regions is the strong updraft speed of convection clouds. The IRW Texture COMB algorithm based on the IRW-Texture Gradient modification and the COMB algorithm shows a significant increase in quality for detecting OT and non-OT pixels in Java. Rainy days with rainfall > 50 mm/day are very common in areas with an altitude of > 500 m. On the other hand, the level of convection activity which is indicated by the presence of OT and lightning is significantly reduced in this area. OT of convective clouds appear more frequently during the DJF season and less frequently during the JJA season. OT often appears during the day time and rarely at night time. Most OTs appear in the central part, away from the south and north coasts of Java Island during the day, while OTs that appear near the south and north coasts of Java Island can appear in the morning or afternoon.
Keyword: convective clouds, extreme weather, Overshooting Tops, Himawari 8 Satellite