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EFFECT OF REPLACEMENT OF ANIMAL PROTEIN CONCENTRATE BY PLANT PROTEIN CONCENTRATE ON PRODUCTIVE PERFORMANCE OF ISA BROWN LAYER | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 38, Issue 4, 2007, Pages 163-150 | ||
| Author | ||
| HENS N . A . Hanash | ||
| Abstract | ||
| The present experiment v;is conducted to evaluate the effects of replacement of imported animal protein concentrate by locally produced plant protein concentrate (sunflower meal supplemented with amino acids , vitamins' and minerals) in layer rations (ISA Brown strain) on the productive characteristics of the hens and some quantitative characteristics of eggs . Five treatments were used ranging from control treatment In (100% imported animal protein concentrate + without plant Protein), T| = 25%, T2 = 50%, Tj = 75% and T'j = 100% locally plant protein concentrate.The experimental rations were iso nintro genous and iso caloric rations. The live rations were ted to 75 layer liens of 24 weeks old during the production period (24 - 40 weeks of age).Thcre were distributed into five treatments of 3 replicatets . ICach treatment containd 5 layer hens. Data were collected for live body weight, weight gain, egg production (H.D. %) , egg weight, egg mass, feed consumption, feed conversion rate and mortality rate through the production period (24 - 40 weeks of age). Results indicated that no significant differences between the different treatments in live body weight during the different production periods. However, the live body weight differed significantly as the bird progresses in age. Weight gains differed significantly during the different production periods. So, Tj and T2 showed the best weight gains among the different treatments . Egg production percentage (H.D. %) showed significant differences (P<0.05) among the different treatments and different intervals. Check treatment (0) followed by Ti and Tj gave the highest (ll.D.%) in this comparison . The production period (32 -36 weeks of age) showed the highest H.D% among the different intervals. Egg weight and egg mass at the different periods did not differ significantly. However, significant differences among the different production intervals were noticed in both egg weight and egg mass except in the first four weeks (24 - 28). The treatments Tj and T j differed as. compared with other treatments in egg mass. The last 8 weeks of egg production period of (32 -40 weeks of age) gave heavier egg weight (64.0 g/egg) and heavier egg mass (59.4 g/egg) as compared with the first 8 weeks of egg production. Data of feed consumption and feed efficiency (g. feed/egg) indicated that the different treatments as well as the different production intervals differed significant!) (!' Keywords | ||
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