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T. Sutardi
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Earth & Planetary Sciences Veterinary

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Silase Jagung, Rumput Gajah dan Pucuk Tebu dalam Ransum Sapi Perah Jantan T. Sutardi
Buletin Ilmu Makanan Ternak Vol. 10 No. 1 (1990): Buletin Ilmu Makanan Ternak
Publisher : Buletin Ilmu Makanan Ternak

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Napier grass, either as sole forage or in a 50:50 combination with sugarcane tops was evaluated and compared with corn silage in growing dairy bulls. Twenty one bulls, 14.0 0.81 month of age, averaging 377  30kg in weight, were divided into weight groups. They were then fed with isocaloric and isonitrogenous diets containing either 50% corn silage, 35% Napier grass or 35% Napier grass + sugarcane tops gained 0.930 kg daily. This was significantly lower (P<0.05) than those on corn silage (1.0290 kg) or Napier grass (0.973 kg). They also consumed less dry matter (9.200 vs 9.886 and 9.929 kg) suggesting that the lower growth performance mainly due the lower palatability of the sugarcane diet. However, partial substitution of Napier grass with sugarcane tops reduced feed/gain (Rp. 1.283.02 vs Rp. 1.075.61). Eventhough corn silage was expensive (Rp. 42.--/kg vs Rp. 18.--/kg Napier grass and Rp. 14.--/kg sugarcane tops), feed cost/gain of the corn silage diet was still the cheapest (Rp. 959.24).
Efek Fermentasi Anaerob terhadap Kadar Sianida Biomas Tanaman Singkong Pahit (Manihot Esculenta) Yuli Retnani; T. Sutardi; M. Sitorus
Buletin Ilmu Makanan Ternak Vol. 10 No. 1 (1990): Buletin Ilmu Makanan Ternak
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The research was done to rest: a) If anaerob fermentation could destroy cyanogenic glucoside, b) If silage of cassava plant, which was high in nutritive value and low cyanide content, was influenced by the proportion of roots, stems and leaves in the silage. The material used in this research was Pengkang variety, a bitter cassava plant, a nine months old. The treatments were 10 different silage of ration for silage with different periods of fermentations, i.e: 0, 7, 21 and 35 days. The split plot design and polynomial orthogonal test were applied for the statistical analysis.The result of this experiment showed that the decreasing in cyanide acid content was affected by the fermentation period (p<0.01), the proportion of cassava plant biomass (p<0.01) as well as by the interaction between the fermentation period and the proportion of cassava plant biomass (p<0.01). The best silage was obtained from the cassava plant biomass that consisted of 25% roots, 25% stems and 50% leaves that was fermented for 21 days. This silage had the lowest cyanide acid content, and the highest crude protein, crude fiber, TDN content and as well as the highest digestibility for Ruminants.
Penggunaan Lumpur Sawit Kering (Dried Palm Oil Sludge) dan Serat Sawit (Palm Press Fiber) dalam Ransum Pertumbuhan Sapi Perah Fauzia Agustin; T. Sutardi; D. Sastradipradja; J. Jachja
Buletin Ilmu Makanan Ternak Vol. 11 No. 1 (1991): Buletin Ilmu Makanan Ternak
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An experiment was conducted to evaluate substitution of native grass and rice bran eith palm press fiber (PPF) and dried palm oil sludge (POS) in nine growing males dairy cattle. The animal had a mean of liveweight of 190 ± 11.2 kg. Levels of substitution were 0, 50, and 100% or 0, 15, and 30% of ration dry matter.Inclusion of PPF and POS in ration had no effect on daily liveweight gain (1.270 ± 0.2 kg). Analysis of empty body composition using the urea space technique revealed that the liveweight gain was associated with deposition of protein and fat. PPF had a low palatability and reduced total dry matter intake when the inclusion was higher than 7% of ration dry matter. However, the PPF was fermentable and volatile fatty acids (VFA) concentration in the rumen increased linearly as PPF level increased in the ration (VFA = 75 ± 0.53 PPF; P<0.05). The intake of the digested organic matter was 2.63, 2.68, and 1.97 kg and that of digestible energy was 19.3, 19.5 and 15.5 Mcal for ration caontaining 0, 15, 30% of PPF, respectively.It was concluded that the POS was an excellent substitute for rice bran, but PPF as a grass substitute should be limited up to 23% of total grass dry matter or 7% of ration dry matter.
Co-Authors D. Sastradipradja Fauzia Agustin J. Jachja M. Sitorus Yuli Retnani