Abstract

A study was carried out to determine the effect of green onion (Allium fistulosum) and garlic (Allium sativum) aqueous extract supplementations in drinking water on growth performances, carcass quality and intestinal microflora of local chicken (Noi). A total of 240 Noi chickens at the 5 weeks of age were randomly distributed in a completely randomized design experiment, with 3 treatments and 4 replicates, each replicate consisted of a pen with 20 female chickens/pen, the experimental data was collected during 9 weeks. Treatments used: (1) Control (Cont): Basal diet (B) without any supplementation in drinking water; (2) OAE: B + 1% onion aqueous extract in drinking water; (3) GAE: B+ 1% garlic aqueous extract in drinking water.

The results showed that the use of green onion and garlic aqueous extracts had significant improved (P0.05). Adding green onion or garlic aqueous extract in drinking water reduced Salmonella.spp; E. coli and Clostridium perfringens in the feces of Noi chickens. Both treatments did not affect the carcass yield of the birds, but little improvement of breast meat color (b^*=9.48) of chickens in OAE compared to others. In general, garlic and green onion aqueous extract at the level of 1% in drinking water could be beneficial for improving final weight and feed conversion ratio and reducing Salmonella.spp; E. coli and Clostridium perfringens in the feces of Noi chickens in confirm house.

Keywords: garlic aqueous extract, green onion aqueous extract, growth performances, intestinal microflora, Noi chicken