Study On Nutritive Effects And Meat Quality Of AA Broilers Fed Different Selenium Sources And Organic Se-Vitamin E Levels

A total of 360 one-day-old Arbor Acres broiler chickens (male and female in half) were randomly divided into 9 treatments (40 for each) with 4 replicates, 10 chickens for each replicate. Birds were fed on corn-soybean basal diets. The nine treatments were (1) Vt 10 IU/kg+ 0 mg/kg Se, (2) VE 10 IU/kg+ 0. 15 rag/kg Se as organic Se, (3) VE 10 IU/kg+ 0. 30 mg/kg Se as organic Se, (4) VE 10 IU/kg+ 0. 15 mg/kg Se as NaSe03, (5) VE 10 IU/kg+ 0. 30 mg/kg Se as NaSe03, (6) VE 10 IU/kg+ 0. 30 mg/kg Se (half from organic Se and half from NaSeOS), (7) VE 150 IU/kg+ 0 mg/kg Se, (8) VE 150 IU/kg+ 0. 15 mg/kg Se as organic Se and (9) VE 150 IU/kg+ 0. 30 mg/kg Se as organic Se. This experiment was conducted to investigate the effect of different Se sources and organic Se-VE levels on nutrition and meat quality, by measuring performance, feather score, biochemistry indexes and meat quality parameters of AA broilers. In addition, the RBVs of two different Se sources were evaluated in terms of various indexes determined in this research.The results showed that, among the groups at 10 IL'/kg VE, feed conversion rate (FCR) of the broilers fed 0. 15mg/kg Se was improved significantly (P<0. 05), compared to that of broilers from the control group. The birds fed 0. 15mg/kg Se from Sel-Plex had the best FCR among all treatments. There was no significant difference in performance between birds fed on 0. 15mg/kg Se and birds fed on 0. 30mg/kg Se when supplemented Se from the same source (P>0.05). When organic Se was supplemented at the same level, no significant difference inperformance was observed between birds fed vitamin E at 150 lU/kg and birds fed VE at 10 lU/kg (P>0. 05).Selenium had a beneficial effect on feather scores in the broiler. At the same growth stage, among the groups at 10 lU/kg VE, feather scores of the broiler had a linear increase with the increasing concentrations of Se from the same source. At the end of week 3 and 4, feather scores of birds fed 0. 30mg/kg organic Se were significantly higher than those of the control group and those of the group at 0.15mg/kg inorganic Se (P<0. 05). At the end of week 6, feather scores of birds fed organic Se were higher again, though not significantly different (P>0. 05). At the same growth stage, feather scores of birds fed 150 ID/kg VE were higher than those of birds fed 10 lU/kg VE given at the same organic Se level.There was no significant effect of different forms and levels of supplemented Se and different levels of organic Se-VE on the slaughter parameters of the broiler (P>0.05).No significant difference was observed in TP (total protein), ALB (albumin) and GLB (globulin) among all treatments. When VE was supplemented to diet at 10 lU/kg, the GLB: ALB ratio of birds fed on 0. 30 mg/kg organic Se was higher than that of those fed on 0. 30 mg/kg inorganic Se (P<0. 05). However, ND titre of birds fed on o. 30 mg/kg organic Se was significantly lower than that of those fed on 0. 15 mg/kg inorganic Se (P<0. 05). ND titre of the broiler from the group of 0. 30 mg/kg Se was lower than that of 0. 15 mg/kg Se when Se was from the same source. Between groups of organic Se at the same level, higher ND titre was found in the birds fed on 150 lU/kg VE rather than in the birds fed on 10 lU/kg VE.There was a positive correlation between blood GSH-Px (glutathione peroxidase, GSH-Px) activity and Se supplemention level in diet. This positive correlation was also found between Se deposition in breast and Se supplemented concentration in the diet. Compared to the groupof 10 lU/kg VE, 150IU/kg VE had a beneficial effect on blood GSH-Px activity and Se accumulation in breast muscle between the two groups at the same organic Se level.The results also suggested that organic Se had a better effect on improving meat quality than inorganic Se. Among the groups at 10 lU/kg VE , the L* values and the drip loss of these birds fed Sel-Plex were lower, but the a* values were higher, compared to that of birds fed selenite sodium, however there was no significant diffe...