Judul: Evaluation of Silage Using Oil Palm Frond on Digestibility of Local Rams
Abstrak: Penelitian ini bertujuan untuk mengevaluasi konsumsi dan kecernaan nutrien pakan domba jantan lokal yang diberikan silase menggunakan pelepah sawit. Penelitian ini menggunakaan 15 jantan lokal dengan bobot badan rata-rata 14,88 ± 1,13 kg berumur 4-5 bulan. Rancangan yang digunakan menggunakan rancangan acak lengkap dengan 3 perlakuan dan 5 ulangan. Perlakuan terdiri atas P0 = 70% hijauan segar berbasis pelepah sawit + 30% bungkil inti sawit, P1 = 70% silase berbasis pelepah sawit, dan P2 = 70% silase kering berbasis pelepah sawit + 30% bungkil inti sawit. Peubah yang diamati adalah konsumsi dan kecernaan nutrien. Data dianalisis secara statistik menggunakan ANOVA dan uji lanjut Duncan. Hasil penelitian menunjukkan konsumsi ransum tertinggi ditunjukkan pada pakan segar. Nilai kecernaan nutrien bahan kering, protein kasar, lemak kasar, dan total digestible nutrient tertinggi ditunjukkan pada perlakuan pakan segar dan silase. Nilai kecernaan serat kasar tertinggi ditunjukkan pada perlakuan pakan silase dan kecernaan BETN tertinggi ditunjukkan pada perlakuan pakan segar.
Keyword: dry silage, local rams, nutrient consumption, nutrien digestibility, palm frond, silage

Judul: EVALUATION OF PALM OIL BASED SILAGE ON THE PERFORMANCE OF LOCAL RAMS
Abstrak: Penelitian ini bertujuan mengevaluasi pengaruh pemberian silase berbasis pelepah sawit terhadap performa domba jantan lokal. Penelitian ini menggunakan domba jantan lokal sebanyak 15 ekor jenis ekor tipis yang berumur 4-5 bulan dengan bobot badan rata-rata 14 ± 0,9 kg yang dibagi menjadi 3 perlakuan dengan 5 ulangan. Perlakuan terdiri dari P0 : 70 % hijauan segar berbasis pelepah sawit + 30% bungkil inti sawit, P1 : 70% silase berbasis pelepah sawit + 30% bungkil inti sawit, P2 : 70% silase kering berbasis pelepah sawit + 30% bungkil inti sawit. Peubah yang diuji adalah konsumsi pakan, pertambahan bobot badan harian (PBBH), efisiensi pakan, dan Income Over Feed Cost (IOFC). Data dianalisis menggunakan Analysis of Varian (ANOVA) dan perlakuan yang berbeda nyata akan dilakukan dengan uji lanjut dengan Uji Duncan. Hasil penelitian menunjukkan bahwa perlakuan hijauan segar (P0) lebih baik dibandingkan silase (P1) dan silase kering (P2). Penelitian ini menyimpulkan bahwa pakan hijauan berbasis pelepah sawit yang diolah dengan silase maupun silase kering belum memberikan pengaruh terhadap performa domba jantan lokal., This study aimsed to evaluate the effect of giving palm frond-based silage on the performance of local rams. This study used 15 local rams aged 4-5 months with an average body weight of 14 ± 0.9 kg, divided into three treatments with five replications. The treatment consisted of P0 : 70% fresh forage based on palm fronds + 30% palm kernel cake, P1 : 70% silage based on palm fronds + 30% palm kernel cake, P2 : 70% dry silage based on palm fronds + 30% palm kernel cake. The variables tested were feed consumption, daily body weight gain (PBBH), feed efficiency, and Income Over Feed Cost (IOFC). Data were analyzed using Analysis of Variance (ANOVA), and Duncan's further test would carry out significantly different treatments. The results showed that the new forage treatment (P0) was better than silage (P1) and dry hay (P2). This study concluded that the processing of palm frond-based forage feed processed with silage or dried silage had not had an effect on the performance of local rams.
Keyword: dry silage, local rams, palm fronds, rams performance, silage

Judul: Bifurkasi Hopf pada Model Siklus Bisnis Kaldor Kalecki tanpa dan dengan Waktu Tunda
Abstrak: Business cycle model is one of dynamical system models in economic. One of the business cycles model is Kaldor-Kalecki model. Kaldor-Kalecki business cycle model that is written in delayed defferential equations, is a business cycle model that involves gross product and capital stock of a company. In this paper Kaldor-Kalecki business cycle model is analyzed using both nondelay and delay in time of capital stock. By Taylor expansion for the time delayed model, an analysis of stability around the fixed points has been done. Furthermore, by using Hopf bifurcation theorem, it can be shown that there exists periodic orbits and limit cycle. In the nondelayed model, changing the parameter of goods market could lead to the occurrence of Hopf bifurcation and the existence of limit cycle. Similarly, for the delayed model, it has been shown that changing the time delay parameter may result in the occurrence of Hopf bifurcation and limit cycle.
Keyword: