Effect of different dietary linoleic acid to linolenic acid ratios on some productive, immunological and physiological traits of Dandarawy chicks
Abstract: This study was carried out to determine the effects of dietary linoleic acid to linolenic acid ratio on productive. immunological and physiological performance of Dandarawy chicks (Egyptian developed strain). A total number of 450 one- day old unsexed chicks were randomly equally divided, into five experimental groups of three replicates (30 chicks. each). The experimental chicks were assigned to 1 of 5 diets that had linoleic acid (LA) to linolenic acid (LNA) ratios of 2:1. 4:1. 6:1. 8:1 and 10:1, respectively by changing the proportions of soybean and linseed oils.
At the end of the 4th week of age chicks of each experimental group had been re-divided into six replicates (three female replicates of 20 chicks each and three male replicates of 10 chicks each). The chicks of each experimental group continued on the same diet till the end of the study (18 weeks of age)
The criteria studied were growth performance (at 4, 8 and 18 weeks of age) some blood immunological parameters (WBCs, RBCs, IgG, HB, IgM, and PCV%) at 8 and 18 weeks of age and immune response against sheep red blood cells (SRBC's). avian influenza (AVI), and Newcastle diseases (ND) titters at 18 weeks of age. Also, at the end of the experimental period, some blood constituents, including total lipids. Triglyceride cholesterol. LDL-cholesterol, total protein. albumin. globulin. as well as AST, ALT and alkaline phosphates enzymes were determined
Results obtained indicate that chicks received LA: LNA ratios of 4:1 and 6:1 in the diets had the highest live body weight body weight gain and the best feed conversion at all tested ages. While, LA: LNA at the ratio of 6:1 (at 18 weeks of age) followed by 4:1 and 2:1 (at 8 weeks of age) showed positive immune functions than higher LA: LNA ratios of 8:1 and 10:1 in the diets. Results of serum metabolites revealed controversial trends, where LA: LNA ratios of 4:1 and 6:1 in the diets had a negative effects regarding serum total lipids, triglycerides, cholesterol and LDL-cholesterol, while, serum total protein. albumin and globulin were elevated with such levels. In conclusion. LA: LNA ratios of 4:1 and 6:1 in the diets of Dandarawy chicks are acceptable and recommended 10 improve the growth performance. physiological traits and immune response up to 18 weeks of age.
Publication year 2011
Pages 149-160
Availability location معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
Availability number
Organization Name
City الاسكندرية
serial title Egyptian Poultry Science
ISSN 1110-5623
Author(s) from ARC
Agris Categories Animal physiology - Nutrition
AGROVOC
TERMS		 Chicks. Immunological factors. Linoleic acid. Linolenic acid. Production.
Proposed Agrovoc physiological performance;
Publication Type Journal
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