Document Type : Research Paper
Authors
1 Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
2 Department of Animal Science, Faculty of Agriculture, Ferdowsi University of Mashhad
Abstract
In order to investigate the effect of soybean oil and lysophospholipid (LPL) in wheat-based diet on production performance, egg quality and blood serum parameters of laying hens, experiment with the number of 648 Hy-line W-36 laying hens during 113-120 weeks of age as factorial 3×2 in the form of randomized complete block design, with 6 treatments, 6 replications and 18 birds per each replication done. The experimental treatments included three levels (zero, 1.5 and 3%) of soybean oil in the diet with (0.05%) and without adding LPL to the diet. In response by increasing the oil level; egg mass, average weight, specific weight, dry matter and crude protein content (yolk and total without shell) of eggs changed quadratically. So that the birds fed with diet containing 1.5% of oil, had the highest numerical value on above indicators. Feed conversion ratio and blood serum phosphorus concentration decreased linearly. Shell weight, shell density, triglyceride and cholesterol concentrations increased linearly. Addition of LPL to the diet decreased daily feed intake, feed conversion ratio and increased shell weight and blood serum phosphorus. Feeding diets containing LPL was more effective in improving the feed conversion ratio in response to increasing the level of dietary oil. The general result is that; Adding vegetable oil at the level of 1.5% to the diet of wheat-based laying hens improves performance indicators and egg quality furthermore, the addition of LPL to the diet has a positive synergistic effect on the oil level of the diet.
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