EFFECT OF DRIED YEAST AND BENTONITE AS SUPPLEMENT ON GROWTH AND SOME CARCASS CHARACTERISTICS IN LAMBS
Mesopotamia Journal of Agriculture,
2018, Volume 46, Issue 3, Pages 17-32
AbstractThis study was conducted on Karadi lambs. The first group (control) was fed on standard ration consisted mainly of barley, wheat bran, urea and wheat straw. The animals second group was supplemented with 10 gm/day/ lamb of dry bread yeast in addition to the base ration. While the 3rd and 4th groups supplemented with either 20gm / day/lamb of bentonite or 20bentonite plus 10 gm / day / lamb of breads yeast respectively. The results showed that the average daily gain of lambs in each group were 260, 319, 282, 286 gm / each head a day respectively. Significant improvement (p< 0.05) in 2nd group was noted as compared to control. Results of rumen fluid parameters showed that pH of rumen fluid before feeding of lambs in the 4th group(5.97)was significantly(p<0.05) decreased as compared with the control. Ammonia concentration in rumen liquor was significantly(p<0.05) decreased before feeding in the 2nd, 3rd and 4thgroup as compared with control, the values were 9.18, 2,87, 4.98 and 5.44 mg / 100 ml respectively. Although, there was increases in ammonia concentration after 2hr. of feeding, but significant decrease was detected in 4th group(5.30) mg /100 ml as compared which the control.The logarithm of bacteria number in the rumen liquor was 9.23, 9.41, 9.54 and 9.41 for the groups respectively, the differences was significant(p<0.05) improvement in 3rd. group on all other groups and 2nd and4th groups significantly improved as compared with control.After 2hr of feeding significant improvement (p<0.05) in 3rd group was detected as compared with control.The logarithm of protozoa number in the rumen liquor in 3rd group (6.21) was significant increased (p<0.05) as compared with control before feeding. Statistical analysis of blood parameters showed no significant changes.
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