Degradability of several feed sourses in the rumen of Japanese black cattle fed high concentrates diet
2005
Nishiguchi, Y. (National Agricultural Research Center for Western Region, Fukuyama, Hiroshima (Japan)) | Ando, S. | Hayasaka, K.
The rumen degradabilites of seven feed sourses (flaked corn, flaked barely, wheat bran, rice bran, soybean meal, soybean curd residue and brewer's grain)were determined by the in situ nylon bag method. Two non-pregnant Japanese black cattle fitted ruminal cannula were fed 75% of concentrates and 25% rice straw twice a daily at 0900 and 1700. Five grams of ground (0.5-2 mm) feed sourses were incubated in the rumen for 0,4, 8,12,24,48 and 72 hours. Dry matter (DM) and crude protein (CP)disapperance were analysed by Orskov's model (p=a+b (1-e-ct)). The effective degradabilities of the DM of brewer's grain and soybean curd residure were 37% and 56%, respectively. The other five feed sources were in the range from 60% to 70%. The patterns of CP disappearance of the tested feed sources, except for corn, were similar to the patterns of DM disapperearance. Corn had no similar patterns between CP and DM disappearances.
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