Judul: Populasi Mikroba Rumen dan Fermentabilitas in vitro Hi-fer+ Pucuk Tebu
Abstrak: Pemanfaatan pucuk tebu sebagai pakan ternak belum optimal karena ketersediaan pucuk tebu yang hanya melimpah pada saat musim panen dan kandungan nilai nutrisi yang cukup rendah. Percobaan ini bertujuan untuk mengevaluasi populasi mikroba rumen dan fermentabilitas in vitro Hi-fer+ pucuk tebu. Percobaan menggunakan rancangan acak kelompok dengan 4 perlakuan 5 ulangan, P0 (pucuk tebu tanpa perlakuan), P1 (Hi-fer+ pucuk tebu fermentasi 2 minggu), P2 (Hi-fer+ pucuk tebu fermentasi 4 minggu), P3 (rumput gajah tanpa perlakuan) dan dianalisis dengan analisis ragam dan uji lanjut ortogonal kontras. Peubah yang diamati adalah fermentabilitas (konsentrasi NH3 dan VFA total), populasi bakteri total, dan populasi protozoa total. Hasil percobaan menunjukkan Hi-fer+ pucuk tebu fermentasi 2 dan 4 minggu berpengaruh sangat nyata (P<0.01) menurunkan derajat keasaman (pH) rumen, berpengaruh nyata (P<0.05) meningkatkan konsentrasi NH3, namun tidak berpengaruh nyata terhadap konsentrasi VFA total, bakteri total, serta populasi protozoa total.
Keyword: ermentabilitas, Hi-fer+, in vitro, populasi mikroba rumen, pucuk tebu

Judul: Karakteristik Fisik, Komposisi Nutrien, dan Kecernaan in vitro Hi-fer+ Pucuk Tebu
Abstrak: Pucuk tebu merupakan limbah tanaman tebu yang sangat potensial sebagai pakan ternak karena ketersediannya banyak dan tidak bersaing dengan kebutuhan manusia. Salah satu keterbatasan dari limbah tanaman tebu adalah kecernaan yang rendah. Penelitian ini bertujuan untuk mengevaluasi karakteristik fisik, komposisi nutrien, dan kecernaan in vitro Hi-fer+ pucuk tebu. Percobaan menggunakan Rancangan Acak Kelompok (RAK) dengan 4 perlakuan dan 5 kelompok. Perlakuan yang digunakan adalah P0 (pucuk tebu tanpa perlakuan), P1 (Hi-fer+ pucuk tebu fermentasi 2 minggu), P2 (Hi-fer+ pucuk tebu fermentasi 4 minggu), dan P3 (rumput gajah tanpa perlakuan). Peubah yang diamati adalah karakteristik fisik, komposisi nutrien, koefisien cerna bahan kering (KCBK), dan koefisien cerna bahan organik (KCBO). Hasil penelitian menunjukkan bahwa pembuatan Hi-fer+ merubah aroma, warna, tekstur, dan pH pucuk tebu. Komposisi nutrien pucuk tebu yaitu kadar BK, BO, LK, BETN, dan TDN baik, tetapi menurunkan PK dan SK. Hi-fer+ pucuk tebu dapat dibuat dengan lama fermentasi 2 atau 4 minggu. Pembuatan Hi-fer+ dapat memperbaiki kualitas fisik, kadar nutrien dan nilai kecernaan pucuk tebu.
Keyword: Hi-fer+, kecernaan, nutrien, pucuk tebu

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