Development And Utilization Of Wheat Resources-A Study On The Effect Of Pentosanase Supplementation To Wheat Based Diets For Broiler Chickens

This paper studied the effect of pentosanase supplementation to the broiler wheat based diets.The following work had been done.Experiment I. A total of 2032 1-day-old broiler chickens were equally divided into 4 groups, and there were 4 replicates per group with 127 broilers.Four Beijing wheat-based diets containing 0,300,500 or 800Xu/kg pentosanase were given respectively to 4 groups from age of 1 to 42 days. It was found that supplementation of pentosanase at all 3 level can improve the broiler performance. Compaired with the control treatment, during the age of 1-21 day, with enzyme supplementation at 300,500 or 800 Xu /kg broilers daily gain were increased by 2. 17%, 3. 83%> 3. 46% respectively ; and feedigain ratios decreased by 3.83%, 5. 43% (P<0. 05), 5. 54% (P<0. 05). During the age of 22-42day, with enzyme supplementation at 300,500 or 800 Xu /kg broilers daily gain were increased by 1. 40%, 2. 54%, 1. 86% respectively ; and feed conversion ratios decreased by 3. 64%, 5. 88% (P<0. 05) , 4. 98% (P<0. 05).Experiment II A total of 480 1-day-old broiler were equally divided into 4 groups, and there were 4 replicates per group with 30 broilers.Two wheat cultivars (Beijing wheat and Hetao wheat) were given with or without 500 Xu /kg pentosanase supplementation .The four diets obtained were given to the 4 groups respectively.The results showed that containing pentosanase in two wheat cultivars diets both improve daily weight gains (P>0.05) , decrease feed:gain ratios (PO.05). With enzyme in the diets ,the relatively weight of digestive organ including muscular stomach ,glandular stomach and small intestine were decreased ; the relative weight of spleen and cloacal bursa were increased; the relative viscosity of intestinal digesta were significantly decreased by 11.92%(P<0.05) and 7.29%(P>0.05) respectively; and the excreta moisture content were significantly decreased (PO.05).Containing pentosanase in the Hetao wheat diets have a better effect on the performance of the broilers than that of the Beijing wheat diets.Experiment III 64 adult cock with similar weigh(about 1.5 kg) were divided into 4 group.There were 4 replicates per group with 4 broilers.Four diets similar to that of the 22-42day diets in Experiment II were given respectively to each group .The results showed that pentosanase can improve the AME of Hetao wheat diets by 6.63%(P<0.05) and Beijing wheat diets by 1.99%(P>0.05).