Judul: Performance Peranakan Ongole (PO) Heifer with Concentrate and Fermented Feed during the Reconditioning Period
Abstrak: Performa sapi dara menjadi hal penting untuk menunjang produktifitasnya. Penelitian bertujuan untuk mengkaji pengaruh pemberian kombinasi sorinfer sebagai substitusi sebagian konsentrat terhadap performa produksi sapi dara Peranakan Ongole (PO) selama periode rekondisi. Sapi yang digunakan pada penelitia ini yaitu sapi dara PO berumur 1−2 tahun (I0−I1) sebanyak 12 ekor dengan rataan bobot awal 177,17±20,35 kg. Penelitian ini menggunakan 3 perlakuan ransum yaitu konsentrat yang dikombinasikan sorinfer dan jerami. Rasio konsentrat, sorinfer, dan jerami adalah 50:20:30 (R1), 35:35:30 (R2), dan 20:50:30 (R3). Peubah yang diamati diantaranya suhu dan kelembapan lingkungan, Temperature Humidity Index (THI), konsumsi ransum as feed, konsumsi BK, konsumsi PK, konsumsi TDN, konversi ransum as feed, konversi BK, Pertambahan Bobot Badan (PBB), bobot akhir, dan feed cost per gain (FCG). Data dianalisis sidik peragam (ANCOVA), kemudian diuji dengan Least Square Mean menggunakan Statistical Analysis Software (SAS). Hasil penelitian menunjukkan konsumsi ransum as feed perlakuan R3 nyata lebih tinggi (P<0,05) dibandingkan dengan perlakuan lainnya. Konversi ransum as feed dan FCG untuk ketiga perlakuan tidak berbeda secara nyata. PBB perlakuan R2 dan R3 nyata lebih tinggi dibandingkan perlakuan lainnya (P<0,05). Perlakuan R2 dan R3 menghasilkan rekondisi sapi dara terbaik berdasarkan konsumsi as feed, konsumsi BK, konsumsi PK, konsumsi TDN, PBB, dan bobot akhir., The performance of heifers is important to support their productvity. The purpose of this study isto examine the effect of partial substitution of concentrate feed with sorinfer silage on the production performance of peranakan ongole (PO) heifer during the reconditioning period. The experiment used 12 heads of PO heifers aging 1−2 years (I0−I1) with an initial liveweight of 177,17±20,35 kg. This experiment used 3 ration treatments, namely combination concentrate, sorinfer silage, and hay with a ratio of 50:20:30 (R1), 35:35:30 (R2), and 20:50:30 (R3). The observed parameters included ambient temperature and humidity, Temperature Humidity Index (THI), feed consumption, feed conversion, daily body weight gain, final live weight, and feed cost per kg live weight gain (FCG). The data were analyzed by analysis of covariance (ANCOVA) and between treatments differences were tested using least Square Means (LS Means) method. The results showed that the R3 consumption as fed was significantly higher (P<0,05) compared to the other two feed treatments. Feed conversions and FCG were not significantly different among treatments. Body weight gain of R2 and R3 treatments were significantly higher compared to R1 treatment (P<0,05). The R2 and R3 treatments gave the best results for reconditioning heifers based on as feed consumption, dry matter feed consumption, PK consumption TDN consumption, live weight gain, and final live weight.
Keyword: performance production, PO heifer, sorinfer, recondition

Judul: Production Performances of PO Cattle and Local Crossbreed Cattle Fattened Based on Fermented Feed After Short Distance Transportation
Abstrak: Performa produksi sapi pasca transportasi sangat dipengaruhi salah satunya adalah aspek pakan yang berkualitas. Salah satu pakan fermentasi alternatif yang dapat diberikan adalah SORINFER (sorghum indigofera fermentasi). Penelitian bertujuan mengevaluasi performa produksi sapi PO dan silangan lokal (SL) pada penggemukan berbasis sorinfer. Sapi yang digunakan dalam penelitian berjumlah 7 ekor, terdiri dari 4 ekor sapi PO dengan bobot awal 286,3±37,9 kg dan 3 ekor sapi silangan lokal dengan bobot awal 287,67±4,62 kg. Sapi yang digunakan sapi jantan umur I1-I2 (18-30 bulan). Peubah yang diamati adalah suhu dan kelembapan, themermometer humidity index (THI), konsumsi pakan bahan kering (BK), protein kasar (PK), energi (TDN), pertambahan bobot badan harian (PBBH), konversi ransum dan bobot akhir sapi. Data dianalisis sidik ragam (ANOVA), kemudian diuji bandng dengan uji Tukey. Proses transportasi jarak dekat menghasilkan susut bobot sapi PO 2,01±1,46% dan sapi SL 1,96±3,35% dengan lama recovery sekitar 10 hari. Hasil penelitian menunjukkan bahwa konsumi BK, PK, konversi ransum, PBBH dan bobot akhir sapi PO dan sapi silangan lokal adalah sama. Sorinfer dapat digunakan sebagai pakan alternatif untuk program pemeliharaan penggemukan sapi PO dan Silangan Lokal, meskipun memberikan pertambahan bobot badan harian masih rendah., Good quality of feed is onf of important aspect to maintain catlle post transport. One of the alternative fermented feed that could be given is SORINFER (fermented sorghum indigofera). This study aimed to examine the production performance of PO and local crossbreed cattle fattened with sorinfer feed. The study used 4 heads of PO Cattle bull with initial weight of 286,3±37,9 kg and 18-30 monts of age, 3 heads of local crossbred bull with initial weight of 287,67±4,62 kg 7 as well as 18-30 month of age. The parameters observed were temperature and humidity, THI, consumption of DM, CP, TDN, ADG, ration conversion, and final weight. Data were analyzed by analysis of variance (ANOVA), then tested by Tukey Pairwise Comparisons. The short distance transportation process resulted in weight loss for PO cattle 2,01±1,46% and local crossbreed 1,96±3,35% with a recovery time of about 10 days. The results showed that the consumption of DM, CP, ADG, ration conversion, and final weight of PO cattle and local crossbreed cattle have no difference. Sorinfer can be used as an alternative feed for PO and local crossbreed fattening progams even though it provides low daily body weight gain. Improving the feedlot performance of local cattle based on Sorinfer based could be carried out by addition some concentrate feed.
Keyword: performance production, local crossbreed cattle, PO cattle, sorinfer

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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