Effect Of Protein Ratio In Fattening Diet On Performance Production And Some Biochemical Characteristics Of Blood In Awassi Lambs

Abstract

This study was conducted in the animal field of the College of Agriculture University of Tikrit for a period of 70days precession this period 14 day as adaptation starting from 8/10/2020 to 16/12/2020. Sixteen Awassi lambs were used, aged 5-6 months, with an average weight of 26.2 ± 0.3 kg. The experimental treatments were, first, the control 98% barley (farmer diet), the second 88% barley + 5% soybean meal+ 5% vegetable fat and the third 83% barley + 10% Soybean meal+ 5% fat and the fourth 78% barley + 15% soybeans+ 5% fat with addition to 1% salts and 1% vitamins and minerals for all treatment. The lambs were fed concentrate feed at 3% of live weight on a dry matter basis with 100 grams/day/lamb straw. The results showed that second, third and fourth treatments significantly (P≤0.05) improved final weight, average daily weight gain and feed conversion ratio compared to the first treatment, the third and fourth treatments (P≤0.05) increased in the daily weight gain, final weight and feed conversion efficiency compared to the second treatment. Significant (P≤0.05) differences were also found in some biochemical characteristics of blood, as increased in percentage of Triglycerides, blood urea and albumin in fourth treatment of lambs compared to ether experimental treatment, while no significant differences were found between experiment groups in proportion of glucose, creatinine, total protein, and the enzyme AST and ALT. note that all blood measurements of the experiment lambs were within normal limits.

Effect of Supplementation of Different Levels of Spirulina Platensis Algae Powder to Two Diets with Two Different Levels of Protein on Some Carcass Characteristics of Lamb

“…The results of the statistical analysis also indicated that there was a significant superiority (P≤0.05) for the high-protein treatments over the low-protein treatments in each of the final body weight (33.35) kg and (31.23) kg and empty body weight (29.56) kg and (27.41) kg, respectively. These results agreed with the results of the study of the researcher [24], where they found an increase in the final weight whenever the percentage of protein in the diet increased when using different levels of protein, where the lambs were fed levels (110,140,170 and 200) g/kg, This study also agreed with the researchers' study [25] where the high protein treatments were superior in final body weight to the control treatment, These results also agreed with what was found by [26], where they indicated that the final weight and empty body weight increased when lambs were fed high-protein diets, while they did not agree with what was found by [27], where they did not show any differences. Significant when using diets with a protein level (14,16,18 and 20%), also did not agree with what [28] indicated, because there were no significant differences when feeding the study lambs on diets with protein content (11,16%).…”