Effects of probiotics supplemented on diets on performance of crossbred Noi broilers from 2 to 10 weeks old
A total of 120 crossbred Noi chickens (male Binh Dinh x female Noi) at two weeks old were allotted in a completely randomized design of four treatments and three replicates (10 broilers for each) to identify effects of probiotics added on diets on bodyweight gain and feed conversion ratio (FCR). The trial was conducted at animal and veterinary experimental farm, Tra Vinh University, from December 2018 to June 2019. Probiotics was supplemented at four levels on diets including 0% (control), 0.1%, 0.2%, and 0.3% for birds on 2-5 and 6-10 weeks of age. Experimental feed was concentrate, which was produced by a feedstuff company. Birds were fed, given fresh water ad libitum, and prevented common diseases. Birds were reared on floor by zinc net on 2-5 weeks old and on biology floor on 6-10 weeks old. The result showed that supplementation of probiotics at levels 0.1%, 0.2%, and 0.3% on diets of crossbred Noi from 2 to 10 weeks of age did not affect on feed intake. However, bodyweight gain of crossbred Noi chickens increased from 14.86 and 15.7 g/bird/day up to 17.5 and 18.49 g/bird/day and FCR was improved from 2.79 and 2.65 to 2.38 and 2.26 when probiotics supplemented at levels from 0% and 0.1% up to 0.2% and 0.3%.
