Judul: Kecernaan Nutrien pada Kambing Perah yang Diberi Ransum dengan Penambahan Daun Ginseng Jawa (Talinum Paniculatum Gaertn)
Abstrak: An experiment was designed in order to study the nutrients digestibility in dairy goat offered diets containing java jinsom leaf. The research was conducted in a dairy goat barn in Animal Research Center, Ciawi, Bogor from May until July 2012. This study used 9 cross breed dairy goats with average weight of 32.96 ± 3.14 kg. The goats were on the 2nd lactation periode and had an average milk yield of 1 liter/day. The dietary treatments were: G0= forage ad-libitum (3000 g – 4500 g) + concentrate 43% dry matter intake + gliricidia 12% dry matter intake G1= G0 + java jinsomleaf 3% dry matter intake; G2= G0 + java jinsom leaf 6% dry matter intake. The treatment were allocated in a completely randomized design with 3treatments and 3replications. The Parameters measured were feedintake, nutrients digestibility, total digestible nutrient (TDN), and milk yield. The different among treatments tested by Contrast Polynomial Orthogonal. The result showed that treatments did notaffect the parameter observed. Feeding grass adlibitum and concentrate 43% dry matter indicated low quality, but fulfilled protein and fat requirements for maintenance and production of the animal. Feeding java jinsom leaf until 6% dry matter did not increase milk yield of sapera dairy goat offered low quality feed.
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Judul: Komparasi Kecernaan Ransum dengan Penambahan Hay dan Silase Daun Rami pada Ternak Kambing Jawarandu secara In Vivo
Abstrak: The study was aimed to compare in vivo digestibility of ramie leaves in the form of hay and silage in jawarandu goat ration. The experiment was done using ewe jawarandu goats weighted 27 ± 4,68 kg from September to December 2010 at the Field Laboratory of Dairy Cattle Nutrition, Faculty of Animal Science, Bogor Agricultural University. Randomized block design was used in this experiment. Three types of ration (R1= Control ration consisted of 50% grass + 50% concentrate; R2 consisted of 50% grass + 40% concentrate + 10% ramie leaf silage, and R3 consisted of 50% grass + 40 + 10% concentrate % hay ramie leaf) were used as treatments. Each treatment was repeated thrice. Ration and nutrients offered, ration and nutrients left over, total faecal and its composition were measured for consumptions and digestibilites calculations. The data obtained were analyzed using analysis of variance (ANOVA) and continued with Duncan's multiple range tests. The results showed that the digestibility of crude protein (DCP) in R1 (68.6%) was higher than R3 (54.90%) and R2 (40.51%) but there were no significant different effect of R1, R2, and R3 on digestibilities of dry matter (DMD), extract ether (DEE), crude fibre (DCF), and nitrogen free extract (DNFE) of the rations. Substitution of 10% concentrate by ramie either in hay or silage forms did not affect digestibility of ration and nutritions except protein digestibility. Subtitution of concentrat by ramie leave in form of hay produced a better digestibility compare to silage. The addition of 10% ramie leaf shaped silage or hay in the ration concentrate jawarandu goats could be done and could produce a good ration digestibility, especially digestibility of ether extract. However, the addition of 10% ramie leaf shaped silage or hay has not been able to replace the protein source of feed materials making up the concentrate control ration (soybean meal and coconut meal) in terms of crude protein digestibility. The provision of ramie in the form of hay produced higher digestibility DCP than ramie in the form of silage.
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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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