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Asian Journal of Animal and Veterinary Advances
Year: 2009  |  Volume: 4  |  Issue: 6  |  Page No.: 337 - 341

The Effects of Replacing Soybean Meal with Different Levels of Rapeseed Meal on Egg Quality Characteristics of Commercial Laying Hens

S.R. Riyazi, Y. Ebrahimnezhad, K. Nazeradl, N. Maheri-Sis, R. Salamatdust and T. Vahdatpour    

Abstract: One hundred and forty four of Hy-line (W-36) laying hens from the age of 44 to 56 weeks were used to evaluate the effects of replacing different levels of rapeseed meal with soybean meal on egg quality characteristics of commercial laying hens. The rapeseed meal was replaced with soybean meal at the levels of 0 (control), 5, 10 and 15% for 12 weeks. Hens were distributed in multi-observational completely randomized block design with 4 treatments, three replicates and 12 hens in each replicate. The parameters used to assess were haugh unit, shell thickness, shell weight, shell strength and yolk index. Results showed that addition of 10% rapeseed meal in diets increased (p<0.05) eggshell weight. With increasing of rapeseed meal level in diets, yolk index had showed decline (p<0.05). No specific trend was observed on the effect of rapeseed meal on haugh unit, shell thickness and shell strength, however these parameters were higher in groups that fed 10% rapeseed meal. We did not observe any health problems of the hens during the experiment.

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