DETERIVIINATION OF NUTRIENTS DIGESTIBILITY, RUNIEN FERMENTATION PARAMETERS, AND MICROBIAL PROTEIN CONCENTRATION ON ONGOLE CROSSBRED CATTLE FED RICE STRAW



Ristianto Utomo(1*), Soedomo Reksohadiprodjo(2), Budi Prasetyo W. B.(3), Zaenal Bachrudin(4), Bambang Suhartanto(5)

(1) Faculty of Animal Science, Gadjah Mada University, Yogyakarta, Indonesia
(2) Faculty of Animal Science, Gadjah Mada University, Yogyakarta, Indonesia
(3) Faculty of Animal Science, Gadjah Mada University, Yogyakarta, Indonesia
(4) Faculty of Animal Science, Gadjah Mada University, Yogyakarta, Indonesia
(5) Faculty of Animal Science, Gadjah Mada University, Yogyakarta, Indonesia
(*) Corresponding Author

Abstract


The utilization of rice straw in the diet is limited by the low of nutritive value and dry matter consumption. From the quantity point of view, the rice straw is very potential feed. The production of rice straw in Indonesia is 41 million tons annually, but just only 31 till 38 % is used as feed. Preliminary study was very important to determine the protein and energy availabilities of rice straw as single ingredient, and nutrient deficiencies could be determined. The study was conducted to determine nutrients digestibility, rumen fermentation parameters (NH; and pH), microbial protein concentration, and balance of nitrogen. Six female nimen fistulated Ongole Crossbred cattle were used in the experiment. The results indicated that the averages of total digestible nutrients of rice straw were 39.13 °/1, digestible protein was 1.82 %,
and nitrogen balance was negative 0.26 %. The averages Nl-i3, pH, and microbial protein concentration of rumen fluid was 22.9 mg/l, 7.17, and 1.01 mgjml, respectively.


Keywords


Rice straw, Digestibility, Rurnen fermentation parameters, Ongole Crossbred cattle

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