Abstract
Problem Statement: This study was conduct to compare effects of various commercial feed additives on performance of laying hens. Approach: To evaluate effects of dietary inclusion of feed additives (Yeasturer, A-Max, Thepax, Fermacto and Biomin) on performance of laying hens, 216 Lohmann LSL-Lite hens were divided in 36 cages (n = 6). Approach Hens in 6 cages (replicates) were assigned to feed on one of the 6 iso-caloric and iso-nitrogenous experimental diets (ME = 2720 Kcal Kg-1 and CP = 145 g kg-1) including control and diets with 0.5 g kg-1 of feed additives. Collected data of Feed Intake (FI), Egg Production (EP), Egg Weight (EW), Egg Mass (EM) and calculated Feed Conversion Ratio (FCR) during 6-week trial period was analyzed based on completely randomized design using GLM procedure of SAS. Results and Conclusions: Dietary additive inclusion significantly affected on EW on 1-3 and 3-6 weeks. Feed additive did not have significant effect on EP, FCR, FI and EM. There was no significant difference in EP, EM, FI and FCR among the experimental groups. Hens received Yeasturer or A-Max showed improved EW compared to hens fed the control diet during weeks 1-3. Hens fed diets included additives showed improved egg shell weight and thickness compared to hens fed the control diet. There was no significant effect of dietary treatment on blood levels of cholesterol, TG and HDL. Adding Thepax or Biomin to diet significantly reduced blood levels of LDL compared to hens fed the other experimental diets. There was no significant effect of dietary treatment on diacritical counts of white blood cells. Recommendations: According to the results of the present study, probiotic Yesture and A-Max can be included in laying hens diets to improve EM. In addition, the commercial feed additives (Yeasturer, A-Max, Thepax, Fermacto and Biomin) used in this study had beneficial effects on egg shell quality characteristics in terms of shell weight and thickness and to decrease egg abnormalities due to poor shell, these feed additives could be recommendable.
Highlights
Gibson and Roberfroid (1995) first defined prebiotics different strains, that can be fed to animals to improve as ‘non-digestible food ingredients that beneficially some aspect of their health
There was no significant difference in Egg Production (EP), Egg Mass (EM), Feed Intake (FI) and Feed Conversion Ratio (FCR) among the experimental groups
Among the egg quality traits, only egg shell weight and shell thickness were significantly affected by dietary additive
Summary
Gibson and Roberfroid (1995) first defined prebiotics different strains, that can be fed to animals to improve as ‘non-digestible food ingredients that beneficially some aspect of their health. Prebiotics must be indigestible to the conducted to assess the ability of probiotics to change animal host while remaining available to the probiotic the type and number of the microflora in the digestive bacteria. Some oligosaccharides are and prebiotics and synbiotics increased their body thought to enhance the growth of beneficial weight gain (Shim et al, 2005). Organisms in the gut and others are thought to evidence suggests that synbiotics are more effective function as competitive attachment sites for than are either probiotics or prebiotics alone and that pathogenic bacteria. Two of the most commonly a mixture of probiotic strains may be more effective studied prebiotic oligosaccharides are Fructo Oligo than the individual strains (Timmerman et al, 2004)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
