Effect of Bacillus Subtilis Spore (GalliPro?) Nutrients Equivalency Value on Broiler Chicken Performance

摘要

The experiment was conducted to evaluate the nutrients equivalency value of Bacillus subtilis spore (GalliPro?) for broiler chickens and its potential for decreasing feed nutrients concentration and cost. A total of 720 day old Ross 308 broiler chicks was allocated in 6 treatments (2 sexes×3 diets) with 6 replication for 7 weeks. Dietary treatments: main treatment (MT) was routine broiler diet added 0.2 g/kg GalliPro? ( Bacillus subtilis 4×109 CFU/g DSM 17299) and using nutrients equivalency of GalliPro? for feed formulation; negative control (NC) was the same as main treatment without GalliPro? (subtracted the nutrients equivalent value of GalliPro?); positive control (PC) was the same as MT diet in nutrients content but without GalliPro?. Effect of dietary treatments on body weight (BW) was not significant. However, the average BW of male and female chicks receiving negative control diet was 2.0% (68 g) lower than PC and MT groups (P>0.05). Dietary treatments had no significant effect on average daily feed intake. Feed conversion ratio of chicks receiving PC and MT diets were 2.7% better than NC chicks (P ? compared with PC showed that GalliPro? liberated 0.4 crude protein from MT diet and consequently decreased the broiler feeding cost.