Judul: Utilisasi Silase Jerami Jagung dengan Suplementasi Kulit Matoa terhadap Penurunan Produksi Gas Metan secara In Vitro
Abstrak: Penelitian ini bertujuan untuk menganalisis pengaruh jerami jagung dengan suplementasi kulit matoa terhadap fermentabilitas dan kecernaan rumen secara in vitro. Penelitian menggunakan rancangan acak lengkap (RAL) dengan 4 perlakuan dan 4 ulangan. Perlakuan meliputi P0 = 1 kg jerami jagung; P1 = 1 kg jerami jagung + 20% kulit matoa; P2 = 1 kg jerami jagung + 30% kulit matoa; P3 = 1 kg jerami jagung + 40% kulit matoa. Parameter yang diamati yaitu analisis proksimat, gas total, gas metana, pH rumen, volatile fatty acid (VFA), NH3, sintesis protein mikrobial (SPM), kecernaan bahan kering (KcBK), kecernaan bahan organik (KcBO), total bakteri, dan populasi protozoa. Data dianalisis menggunakan analysis of variance (ANOVA) dan diuji lanjut dengan Uji Duncan menggunakan program SPSS 25. Perlakuan tidak berpengaruh nyata terhadap pH rumen, kadar NH3, SPM, KcBK, dan KcBO. Namun, berpengaruh nyata pada total produksi gas total, penurunan gas metan, dan konsentrasi VFA. Silase jerami jagung dengan suplementasi kulit matoa efektif menurunkan gas metan, tetapi tidak mempengaruhi fermentabilitas dan kecernaan rumen., This study aimed to analyze the effect of corn straw silage with matoa peel supplementation on fermentability and rumen digestibility in vitro. This study used a completely randomized design (CRD) with 4 treatments and 4 replications. The treatments consisted of P0 = 1 kg corn straw; P1 = 1 kg corn straw + 20% matoa peel; P2 = 1 kg corn straw + 30% matoa peel; P3 = 1 kg corn straw + 40% matoa peel. Parameters observed were proximate analysis, gas production, methane gas, rumen pH, volatile fatty acid (VFA), NH3, microbial protein synthesis (MPS), dry matter digestibility (DMD), organic matter digestibility (OMD), total bacteria, and protozoa population. Data were analyzed using analysis of variance (ANOVA) and further tested with Duncan's test using the SPSS 25 program. The treatment had no significant effect on rumen pH, NH3 levels, MPS, DMD, and OMD. However, the treatment had a significant effect on total gas production, methane gas reduction, and VFA concentration. Corn straw silage with matoa peel reduced methane gas but it did not affect on rumen fermentability and digestibility.
Keyword: fermentabilitas, in vitro, jerami jagung, kulit matoa, Metan

Judul: Combination of Corn Straw and Matoa Peel (Fiber Composition Quality and In Vitro Fermentability)
Abstrak: Penelitian ini bertujuan mengevaluasi fermentabilitas serta kecernaan rumen terhadap silase jerami jagung yang dikombinasikan dengan kulit buah matoa secara in vitro. Penelitian ini menggunakan 16 sampel dengan 4 perlakuan dan masing-masing perlakuan diulang sebanyak 4 kali. Perlakuan terdiri dari P0 = 1 kg jerami jagung + 0% kulit matoa; P1 = 1 kg jerami jagung + 20% kulit matoa; P2 = 1 kg jerami jagung + 30% kulit matoa; P3 = 1 kg jerami jagung + 40% kulit matoa. Parameter yang diamati dalam penelitian ini meliputi fermentabilitas pakan yang terdiri dari pH rumen, volatile fatty acid (VFA) total dan NH3 serta kecernaan pakan yang meliputi kecernaan bahan pakan kering (KcBK) dan kecernaan bahan pakan organik (KcBO), fraksi serat, protozoa, dan total bakteri rumen. Data dianalisis dengan menggunakan analysis of variance (ANOVA) dan perlakuan yang berbeda nyata diuji lanjut dengan uji Duncan menggunakan program SPSS 25. Hasil penelitian menunjukkan perlakuan tidak berpengaruh nyata (P>0,05) terhadap kadar acid detergent fiber (ADF), neutral detergent fiber (NDF), hemiselulosa, total protozoa, pH, KcBK, KcBO, dan total VFA. Perlakuan berpengaruh nyata terhadap (P<0,05) terhadap konsentrasi NH3 dan total bakteri. Penambahan kulit matoa belum memberikan efek positif untuk komposisi serat, fermentabilitas dan kecernaan rumen secara in vitro. Kata kunci: fermentabilitas rumen, fraksi serat, kecernaan, kulit matoa, jerami jagung, This research aimed to evaluate the in vitro ruminal fermentability and digestibility of corn straw silage combined with matoa peel. This study utilized 16 samples with 4 treatments and each treatment was repeated 4 times. The treatments consisted of P0 = 1 kg of corn straw + 0% matoa peel; P1 = 1 kg of corn straw + 20% matoa peel; P2 = 1 kg of corn straw + 30% matoa peel; P3 = 1 kg of corn straw + 40% matoa peel. The observed parameters in this study included feed fermentability, which consists of rumen pH, total volatile fatty acids (VFA), and NH3, and feed digestibility, fiber fraction analysis, total protozoa, and total rumen bacteria. Data were analyzed using analysis of variance (ANOVA), and significantly different treatments were further tested using Duncan's test using SPSS 25 program. The results of the study indicated that the treatments did not have a significant effect (P>0.05) on the levels of acid detergent fiber (ADF), neutral detergent fiber (NDF), hemicellulose, total protozoa, dry matter digestibility (DMD), organic matter digestibility (OMD), and total VFA. The treatments had a significant effect (P<0.05) on the concentration of NH3, pH, and total bacteria. The © Hak Cipta milik IPB, tahun 2024 Hak Cipta dilindungi Undang-Undang Dilarang mengutip sebagian atau seluruh karya tulis ini tanpa mencantumkan atau menyebutkan sumbernya. Pengutipan hanya untuk kepentingan pendidikan, penelitian, penulisan karya ilmiah, penyusunan laporan, penulisan kritik, atau tinjauan suatu masalah, dan pengutipan tersebut tidak merugikan kepentingan IPB. Dilarang mengumumkan dan memperbanyak sebagian atau seluruh karya tulis ini dalam bentuk apa pun tanpa izin IPB. treatment with the addition of matoa peel can’t had positive effect on fiber composition, rumen fermentability and digestibility. Keywords: corn straw, digestibility, fiber fraction, matoa peel, rumen fermentability
Keyword: corn straw, digestibility, fiber fraction, matoa peel, rumen fermentability

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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