标题：The Supplementation Effects of Multienzymes and Synbiotics on Production Performance, Nutrient Utilization, Economic Value and Salmonella spp. Content of Broilers
摘要：Background and Objectives: The use of enzymes either individually or in combination with other feed additives in poultry production has been studied thoroughly but the results are still contradictory. Thus, the objective of the present study was to evaluate the production performance, nutrient utilization , economic value and Salmonella spp. content of broilers fed diets containing multienzymes and synbiotics. Materials and Methods: The experiment was designed using a completely randomized design consisting of three treatments and six replicates. A total of 180 one-day-old unsexed Cobb chicks were randomly distributed into 18 pens (10 birds/pen) and fed a control diet (R0), diets supplemented with multienzymes (R1) and diets supplemented with multienzymes and synbiotics through drinking water (R2). The assay diets were offered ad libitum during the experiment. Results:0.05) were observed in the growth performance, apparent metabolizable energy values (AME/n), dry matter (DM), crude protein (CP) and phosphor (P) digestibilities, carcass traits , or economic value of broilers in all treatments. Significant differences (p<0.05 to p<0.01) were observed in the digestibility of neutral detergent fiber (NDF) and phytate as well as the Salmonella spp. content. Birds given R1 and R2 treatment diets had higher (p<0.05) NDF and phytic acid digestibilities than did those receiving the R0 treatment. The Salmonella spp. content of birds given the R1 and R2 treatments was lower (p0.05) between the R1 and R2 treatments. Conclusion: The supplementation of multienzymes, alone or in combination with synbiotics, resulted in higher NDF and phytate digestibilities and a lower Salmonella spp. content. The AME/n and P digestibility were slightly improved by the treatments. The growth performance, dry matter and CP digestibilities, carcass traits and economic value of broilers were not influenced by the treatments.
关键词：Carcass traits; corn based diet; enzymes; nutrient utilization; poultry diet; production performance; synbiotics
