Judul: Pengaruh Limbah Media Produksi Jamur Pelapuk Kayu Isolat HS Terhadap Konsumsi, Produksi dan Efisiensi Pakan pada Ternak Domba
Abstrak: The production medium waste of wood rot fungi HS isolate has a potency to be used as ruminants feed, because the fungi have high ligninolytic activity. The purpose of this experiment was to investigate the utilization of fungi production medium waste as napier grass substitution on feed consumption, daily gain, feed efficiency and income over feed cost of Priangan lambs. The experiment used fifteen lambs with average body weight of ± 12kg. A randomized block design was used with three treatments and five replications. Treatments consisted of : R1 = 50% concentrate + 50% napier grass: R2 = 50% concentrate + 25% napier grass + 25% fungi production medium waste; R3 = 50% concentrate + 25% napier grass + 25% fungi production medium. The results of the experiment showed that lambs given R2 ration had significantly (P<0.05) higher consumption, lower feed efficiency and income over feed cost, but did not significantly affect body weight gain compared to R1 and R3 rations. Therefore it can be concluded that utilization of 25% the production medium waste of wood rot fungi HS isolate in lambs ration to subtitute napier grass decreased body wight, feed efficiency an income over feed cost.
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Judul: Kecernaan, Retensi Nitrogen dan Performa Domba yang diberi Ransum yang mengandung Sabut Kelapa Sawit Fermentasi dengan Pleurotus ostreatus
Abstrak: Availability of palm press fiber (PPF) as a by-product of palm oil processing increased every years. PPF is potential to be used as feed, but it contains high lignin. Lignin content of the PPF can be reduced by pre-treatment such as fermentation using a white root degrading fungi of Pleurotus ostreatus. The aims of this study were to evaluate digetibility, nitrogen retention and performance of sheep offered diets composed of palm press fiber (PPF) fermented by Pleurotus ostreatus. Twelve male sheep weighing of 23.32 ± 1.68 kg were devided into four groups and randomly allocated into three dietary treatments in a randomized block design. The treatments were levels of fermented PPF in the diets: R0 (30% napier grass + 70 % concentrate), R1 (15% napier grass 15% PPF + 70% concentrate) and R2 (30% PPF + 70% concentrate). The result showed that the mean of daily gain (ADG), total digestible nutrient (TDN) and nitrogen retention in sheep were not different among treatments. Dietary inclusion of PPF decreased the ether extract intake and digestible crude fiber (P<0.05) and decreased digestible crude protein (P<0.01). It was concluded that PPF could be included in the ration of sheep to replace napier grass.
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Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf