Effects Of Trehalose On Performance And Physicochemical Properties In AA Broilers

The studies were designed to explore the effects of trehalose on application and to provide basic materials for trehalose application in livestock production and animal products processing industry. The present research included two parts including the absorption mechanism of trehalose in AA broilers (part one) and the effects of trehalose supplemented in diets on the digestion performance, physicochemical properties, growth performance, carcass characteristics, and meat quality(part two) .Our studies included three experiments presented as follows:In experiment 1 we studied the absorption mechanism of trehalose in AA broilers. The results showed that trehalose can be detected and the concentrations were declined at different level according to the time (0.5 h, 1 h, 2 h) after feeding trehalose, 20.42 mg/ Kg, 15.67 mg/ Kg and 12.93 mg/ Kg were measured respectively in trehalose groups. So trehalose can be directly absorbed into the blood in AA broilers.In experiment 2 we studied the effects of trehalose supplemented in diets with the levels of 0%, 0.1%, 0.3% and 0.5% on digestion performance and chemical properties in AA broilers. The results showed as follows: the length and weight of intestine were increased in trial groups. The length and weight in the group fed with 0.1% trehalose were higher (P<0.05) than in control group; Amylase activity was slightly decreased in trial groups, while the protease activity was not significantly higher (P>0.05) than in control group. In trial groups, the counts of coliform bacteria were significantly decreased in the ileum and caeca (P<0.05), and the counts of lactobacillus were significantly increased (P<0.05); the levels of serum albumin was significantly increased in trial groups (P<0.05), and the contents of phosphorus in the serum was significantly lower (P<0.05) than in the control group; The contents of MDA in liver were significantly decreased (P<0.05) compared with the control group without affecting the activity of GSH-PX. The study revealed that adding trehalos in diets can improve the digestion performance significantly, optimize the composition of intestinal microbes and decrease the MDA contents, the group with 0.1% trehalose was the best.In experiment 3 we studied the effects of trehalose supplemented in diets with the levels of 0%, 0.1%, 0.3% and 0.5% on the growth performance, carcass characteristics, meat quality. The results showed as follows: compared with the control group, the weight of AA broilers were increased in groups with 0.1%, 0.3% and 0.5%, the performance was improved significantly by 9.42%,4.03% and 7.01% respectively; daily gain was increased and feed/gain was decreased significantly (P<0.05) in trehalose groups, the group with 0.1% trehalose was the best; compared with the control group, death ratio was decreased significantly (P<0.05) in trial groups. The semi-eviscerated percentage, eviscerated percentage and chest muscle rate significantly were increased (P<0.05); In trial groups, the thymus, spleen and bursa indices were increased, the group with 0.1% trehalose had the significant effect compared with the control group (P<0.05); The chest tendernesses and the water holding capacities were improved significantly (P<0.05), and protein in muscle was increased significantly (P<0.05). Adding trehalos in diets can promote the growth, improve the daily gain and decline the death ratio. And also can improve the carcass characteristics and meat quality, increase the protein in muscle. In conclusion, adding trehalose in diets can improve the AA broilers'digestion performance significantly, optimize the composition of intestinal microbes, so can improve performance and improve meat quality, and adding 0.1% trehalose is the best.