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Articles by I.I. Omara
Total Records ( 3 ) for I.I. Omara
  O.M. El - Husseiny , A.Z. Soliman , I.I. Omara and H.M.R. El - Sherif
  An experiment conducted to examine the effect of methionine (M), folic acid (F) and vitamin B12 and their interactions on Bovans White laying hen performance, egg quality, nutrient digestabilities and relative economic efficiency (REE) from 28 to 43 weeks of age. The experiment was conducted in a 3 x 3 x 2 factorial arrangement of treatments, three levels of M (0.40, 0.45 and 0.50%), three levels of F (6.0, 9.0 and 12.0 mg/kg) and two levels of B12 (0.01 and 0.02 mg/kg) were used. 0.45% M, 0.50 mg F/kg and 0.01 mg B12/kg considered as a control. The results indicated that layers fed high level of M gave the best egg production (EP), the least feed consumption (FC) compared with either medium or low M levels with no significant differences. Layers fed high level of M recorded high egg weight (EW) and improved feed conversion ratio (FCR) compared with either medium or low M levels with significant differences (p ≤ 0.05). The interactions of M x F x B12 had significant effect on egg shell percentage (ESP), egg content percentage (ECP) and blood hemoglobin (BH), with no significant effect on EP, FC, FCR and egg shell thickness (ST). The interaction of high level of M with F and B12 supplementation gave the best performance and REE compared with either medium or low M levels. It could be concluded that feeding diet at 0.50% M with supplemented F and B12 (12.0 and 0.02 mg/kg, respectively) gave the best performance and REE.
  O.M. El-Husseiny , M.O. Abd-Elsamee , I.I. Omara and A.M. Fouad
  The experiment was designed to evaluate the effect of supplemented zinc (Zn) and niacin (Nia.) on laying hen performance, egg quality, nutrient digestabilities and relative economical efficiency (EEf) from 28-43 weeks of age. Bovans White Laying hens fed diets supplemented with four different levels of Zn (70,105,140 and 175 mg/kg diet) in combination with four different levels of Nia. (30,150,300,450 mg/kg diet) in a factorial arrangement design. The diets which contained on 70 mg Zn/kg and 30 mg Nia/kg considered as a control. The results indicated that supplemented Zn and Niacin (Nia.) increased the egg production significantly (p ≤ 0.05) compared with the control group. The best feed conversion ratio (FCR) was observed when diet supplemented with Zn and Nia. at 175 and 30 or 175 and 450 mg/kg, respectively. Egg weight (EW) did not improve by supplementing Zn and Nia. Supplemented Zn at 105 mg/kg recorded the best serum total immunoglobulin titres (STIT), While, supplemented Nia. at 300 mg/kg gave the best STIT. Supplemented Zn and Nia. had significant effect on egg shell thickness (EST), blood hemoglobin (BH) and nutrient digestabilities especially improving crude protein digestibility linearly parallel with dietary Zn levels increased. Supplemented Zn at level of 105 mg/kg with 30 mg Nia/kg or 175 mg Zn/kg with 30 or 450 mg Nia/kg gave the highest economical efficiency. Feeding laying hen on diet containing 105 mg Zn and 30 mg Nia/kg resulted in the best performance, egg quality and economical efficiency.
  M.R. Ibrahim , H.M. El-Banna , I.I. Omara and Marwa A. Suliman
  The present study was conducted to evaluate, determine nutrient digestibility and nutritive value of lemon pulp and orange pulp. The citrus by-products were replaced for yellow corn in the basal diet at 3 levels (20, 40 and 60%) for each by-product. A total number of 21 White New Zealand rabbits (NZW) at 8 weeks of age were individually weighed and randomly assigned individually into seven groups representing the seven experimental groups. Each group was divided into three replicates of one rabbit each. All animals were kept under the same management and hygienic conditions and were housed in metal battery cages supplied with separated feeders. Diets were offered ad-libitum and fresh water was available all times from automatic nipple drinkers. The experimental period lasted for 11 days. All rabbits were vaccinated against diseases and they were under veterinary control. The result showed that lemon and orange pulps are rich in CF, NDF, ADF, ADL, Hemi-cellulose and cellulose compared to yellow corn but CP and GE content for lemon and orange pulps are similarly equal compared to yellow corn. The content of vitamin C in lemon pulp and orange pulp was 0.068 g/100 g and 0.144 g/100 g compared with yellow corn 0.030 g/100 g, respectively. The anti-oxidant content of lemon pulp and orange pulp was 11.60 μl and 12.2 μl compared the yellow corn (8.29 μl) at 25 μl and 17.9 μl and 16.4 μl compared with 15.24 μl at 50 μl, respectively. The total saturated fatty acids content of lemon pulp and yellow corn was approximately equal but its content in orange pulp was higher than the yellow corn. Total unsaturated fatty acids content of lemon pulp and orange pulp were to be lower than that in yellow corn. There were insignificant differences in DM and Organic Matter (OM) digestibility among the experimental diets and control diet. The obtained results also that 40% substitution level of lemon pulp recorded the highest (p<0.05) value for CP digestibility (84.77%) compared others substitution levels of lemon pulp and control diet. The digestibility of Crude Fiber (CF) was recorded highest (p<0.05) value for 60% substitution level of orange pulp when compared to the control diet and other tested levels of lemon pulp and orange pulp. The Ether Extract (EE) digestibility was recorded the lowest (p<0.05) value with 60% substitution of lemon and orange when compared to the control diet and other substitution levels of lemon pulp. The diet containing 20% substitution level of orange pulp recorded highest (p<0.05) digestibility of NFE. While, the diet containing 60% substitution recorded lowest (p<0.05) value of DCP when compared to control diet and other substitution levels of lemon pulp. The different substitution levels of orange pulp showed insignificant differences when compared to the control diet. The Total Digestible Nutrients (TDN) and Digestible Energy (DE) recorded insignificant difference among control diet and 20, 40 and 60% substitution levels of lemon pulp. The diet containing 20% substitution level of orange pulp was higher in TDN and DE than the control diet. The diets containing 40 and 60% substitution levels for orange pulp recorded insignificant differences when compared to the control diet. Conclusively, replacing lemon pulp at levels of 20 and 40% and orange pulp at levels of 20 and 60% for yellow corn in rabbit diets achieved best nutrients digestibility and nutritive value.
 
 
 
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