Studies on the roughage utilization in fattening young Japanese beef steers, 1: Effects of ratios of concentrate and roughage on growth and meat quality
1993
Miyoshi, H. (Shimane-ken. Animal Husbandry Experiment Station, Izumo (Japan)) | Tsunematsu, S. | Ishii, K. | Sekine, J. | Morita, Z.
To study the effects of differences in roughage ratio in a diet and a weight gain during the first period of fattening, fattening experiment was carried out with 3 experimental groups such as high and low levels of roughage feeding (daily gain, 0.8 kg) and quasi full feeding (daily gain, 1.0 kg) groups. results were as follows: 1) An average daily gain throughout the fattening period was in the order of 0.83 kg for the quasi full feeding group, 0.80 kg for the high roughage feeding group and 0.74 kg for the low roughage feeding group. A high daily gain in the first fattening period resulted in a higher average daily gain throughout the fattening period. The results of daily gain in each period of fattening showed that steers in the high roughage feeding group gave a fairly higher performance of the gain in the last period of fattening while those in the low roughage feeding group and the quasi full feeding group tended to decrease growth rate after 48 weeks of fattening. 2) Increase in the withers height for each group was about the same level up to the middle period of fattening, irrespective of a weight gain. In the last period of fattening, however, steers in the quasi full feeding group slowed their growth in withers height down in an early stage of the period. 3) The roughage ratio for the high roughage group was 40% on the basis of TDN in the present study. As steers in the group showed a high feed intake, a higher intake is expected under the feeding of good quality roughage
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