Determination of nutritional requirements for some local chicken
Abstract: A total number of 240 pullets (aged 35 weeks) from Gimmizah local strain were used to evaluate the effect or using 5 different types of oils: collonseed oil (CSO), linseed oil ( LSO ) , corn oil ( CO ) , sunflower oil ( SFO ) and oil blend ( OB ) at 2 ,4 and 6% levels supplementation in the diets on fatty acids composition of egg yolk, productive performance, egg quality and economic efficiency for egg production. The diets were formulated to be isocaloric -isonitrogenous according to the requirements recommended by the National Research Council (NRC) 1994. The birds were housed individually in separate layer cages (open-system). They were divided at random into sixteen equal groups (15 pullets / group) alloted to the experimental 16 diets. The experiment extended for 12 weeks (from: 35 to 47 weeks of age), divided into 3 intervals, 28 days each (from 35 to 39, 39to 43 and 43 to 47 weeks)
Our results indicated that 6 % SFO-diet gave the highest value of total polyunsaturated fatty acids as a relative of total unsaturated fatty acids. Corn oil at 6 %, SFO at 6 % and LSO at 4 % diets recorded the highest value of body weight at 39, 43 and 47 weeks of age, respectively. Hens fed on 4 % CO-diet consumed high amount of feed during interval I whereas during interval II, III and the overall interval, 6 % CO-diet recorded the highest value. The best values of feed conversion ratio were noticed with the control-diet (without oil supplementation) during the various experimental intervals of age. There were no significant differences either among the type of oils or even between their levels in mortality rate. The best value of egg weight was recorded by the hens fed on control and 6 % SFO diets during intervals I and the overall interval of age, respectively, whereas during intervals II and III or age 2 % CO-diet noticed the highest ( best) value. Hens fed on diets supplemented with 2 % from CSO gave numerically the highest (best) value of egg, number and mass during interval I, whereas, those fed on LSO with the same level gave the best value of egg production rate during interval I and the overall interval of age. During interval II of age the best values of egg, number, mass and the rate of production were recorded by the hens fed on 4 % CO-diet. Hens fed on 6 % LSO-diet gave numerically the highest (best) value of egg, number and egg production rate during interval III, whereas, those led on diet supplemented with 4 % from LSO gave numerically the highest (best) value of egg mass. Generally during the overall interval of age 2%LSO-diet recorded the best value of egg number, whereas, 6% LSO-diet recorded the highest value of egg mass. In respect of dietary type of oils and their levels on, egg quality traits control-diet recorded the highest value of egg shape index, shell thickness and relative shell weight to egg weight. Oil blend at 6% gave numerically the lowest value of relative, albumen and yolk weights to egg weight. The highest value of, Haught units, shell weight, yolk weight and yolk index was noticed with, 6%LSO, 4%CO, 4%OB, 2%CO and 4%LSO, respectively. Generally the economic evaluation for egg production indicated that control-diet recorded the highest (best) value in both net return and economic efficiency during interval I and the overall interval, whereas during the intervals II and III of age 2% OB and 4%LSO diets recorded the best value in both the two economic indexs , respectively
Publication year 2003
Pages PP.121
Availability location مكتبة معهد بحوث الانتاج الحيوانى-شارع نادى الصيد - الدقى - الجيزة
Availability number 855
Organization Name
Country Egypt
Author(s) from ARC
Agris Categories Animal feeding
AGROVOC
TERMS		 Cottonseed oil. Economic analysis. Egg production. Egg yolk. Fatty acids. Feed conversion efficiency. Layer chickens. Linseed oil. Sunflower oil.
Proposed Agrovoc Gimmizah local strain;corn oil;oil blend;productive performance;egg quality;egg performance;
Publication Type Master Thesis
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