Mechanisms of Dietary Inclusion of Cottonseed Meal to Alleviate Malabsorption Syndrome in Broilers
It was to explore whether the change of dietary was the cause of MAS of broilers, and the effects of the finisher diet supplemented with 4% CSM, growth performance and digestibility of broilers. This study adopted two-factor randomized block design, which included two nutrient levels (Finisher Diet and Grower Diet) and two CSM levels (0% and 4%) to form four experimental diets. A total of 192 AA meal broiler chicks on 7 days of age were divided into 4 groups with 6 replicates per treatment, 8 broilers per replicate, according to 6 body weight block. Broilers were fed the same corn-soybean meal basal diet (Grower Diet) at 7 to 21 days of age, four experimental diets at 21 to 35 days of age, and the same basal diet (Finisher Diet) at 36 to 42 days of age. The results showed as follows: 1) Dietary inclusion of 4% CSM had no significant effects on broiler performance (P>0.05), but the F/G of broilers fed grower diet at 21 to 35 days of age was significantly lower than that of broilers fed finisher diet (P<0.05). 2) Compared with the finisher diet (high GE and low CP level), feeding the grower diet (low GE and high CP level) decreased the total tract retention of DM and CP of broilers.3) Fed the finisher diet (high GE and low CP level) inclusion of 4% CSM increased total tract retention of ADF (P<0.05), and there were no differences in total tract retention of DM, CP, DNF and hemicellulose (P>0.05).