Fattening performance, feed intake, diet digestibility, rumen fermentation and blood parameters in Romanov×Lori Bakhtiari crossbred and Lori Bakhtiari lambs

Document Type : Research Paper

Authors

1 Former MSc. Student of Animal Nutrition, Department of Animal Science, Faculty of Animal Science and Food Industry, Ramin Agriculture and Natural Resources University of Khuzestan, Molasani, Ahvaz, Iran

2 Associate professor / Ramin Agriculture and Natural Resources University of Khouzestan

3 Associate Professor, Department of Animal Science, Faculty of Animal Science and Food Industry, Ramin Agriculture and Natural Resources University of Khuzestan, Molasani, Ahvaz, Iran

Abstract

Present experiment was conducted to compare the performance of Romanov×Lori Bakhtiari crossbred (F1) and Lori Bakhtiari male lambs. Fifteen lambs (initial body weight of 20±1 kg) from each group were fed ad libitum by a balanced diet, and weightd at the end of fattening period and at 15-days intervals. Average daily gain, daily feed intake, diet digestibility, rumen pH and ammonia nitrogen, blood glucose and urea nitrogen were determined. Chewing activity was studied during 24 h. At the end of fattening period, three lambs from each group were slaughtered, and the hot carcass and offal weights and were measured. Dry matter (58.79 vs. 62.35 %) and acid detergent fiber (35.84 vs. 39.92 %) digestibility in crossbred lambs were less than Lori-Bakhtiari sheep (P<0.05). Chewing activity (576.25 vs. 473.50 min/day) of crossbreds was more than Lori-Bakhtiari lamb (P<0.05). The average daily gain (0.190 vs. 0.156 g/day), feed conversion ratio (4.86 vs. 6.04) and hot carcass efficiency (58.65 vs. 52.07 %) of crossbreds were more than Lori-Bakhtiari lambs (P<0.05). The weight of entrails in Lori-Bakhtiari sheep was higher than the crossbred animals (P<0.05). Overall, due to their superior performance characteristics, F1 crossbreds of Romanov×Lori-Bakhtiari could be used instead of Lori-Bakhtiari lambs for fattening in Khuzestan province. However, more studies should be conducted to confirm the results of this study.

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References

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Animal Production Research
Volume 6, Issue 2
September 2017
Pages 1-12

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