USES OF PREPARED PROBIOTICS INSTEAD OF HARMFUL GROWTH PROMOTERS IN SHEEP PRODUCTION TO AVOID ADVERSE EFFECT ON HEALTH

Abstract

The study was conducted at Environmental Biotechnology Laboratory and Animal Farm under the Department of Animal Production & Management, Sher-e-Bangla Agricultural University. The research was for one year, but the sheep rearing period was for three months and it was the month of March-May, 2018. Eight 8-9 month-old sheep were collected from BLRI, Savar, Dhaka. The sheep were group penned for each of the replication. The control group- T was fed basal diet (unsupplemented or control). Antibiotic group- T 2 1 containing 14 mg/L of Renamycin and probiotic group- T 3 (probiotics prepared by bacteria) provide 10 ml/kg of feed and probiotic group- T

(probiotics prepared by bacteria and yeast) provide 10 ml/ kg of feed. Same amount of feed supplied to all group but probiotics group produced highest live weight which had significant (P< 0.05) difference with sheep of control and antibiotics group. Dressing percentage was not affected by probiotics. The significantly (P<0.05) lowest glucose level was found in probiotics group. That indicates better fiber digestion and better weight gain. But other hematological parameters like PCV, RBC,WBC, Platelates, cholesterol and ESR did not affected (P> 0.05) by probiotics. The number of harmful bacteria reduced in probiotics group which had significant (P< 0.05) difference with sheep of control group. Testicular weight and G.I.T weight affected by probiotics. No significant ( P> 0.05) difference was found in weight of liver, spleen, lungs and heart. Again, fresh meat quality and chemical composition did not affected (P> 0.05) by probiotics supplement. From the findings, it is concluded that Probiotics feeding as a feed additives causing better live weight gain by competitive exclusion of pathogenic microorganism and improved fibre digestion. 4