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Articles by M.H. Rabie
Total Records ( 7 ) for M.H. Rabie
  Abo El-Maaty , M.A. Hayam , M.H. Rabie and A.Y. El-Khateeb
  An experiment was carried out to investigate the effect of feeding three types of herbs (cinnamon, turmeric and ginger) and ascorbic acid on the performance of broiler chicks kept under Egyptian summer conditions. A basal diet composed mainly of corn, corn gluten and soybean meal was used as a control and tested herbs were singly added at 0.5 g kg-1 and ascorbic acid at 200 mg kg-1; thus, five experimental diets were formulated and used from 2-6 weeks of age. All chicks were managed similarly. The criteria of response were growth performance, carcass traits, nutrient digestibility and some blood plasma parameters. Dietary supplementation with the tested herbs and ascorbic acid positively affected growth performance and economic efficiency of chicks while feed intake was unaffected. Feeding the tested materials improved digestibility of crude protein and ether extract but those of other nutrients were unaffected. Dressing-out percentage, carcass yield and liver were significantly improved due to feeding the experimental diets but other carcass traits were unaffected. Blood plasma triglycerides, total cholesterol, low-density lipoprotein-cholesterol, very low-density lipoproteins and creatinine as well as activity of transaminases were significantly decreased while high-density lipoprotein-cholesterol was increased due to feeding the tested materials. Dietary supplementation with the tested materials led to a significant reduction in plasma malondialdehyde but reduced glutathione and activity of superoxide dismutase were increased. Dietary supplementation with cinnamon, turmeric or ginger at a level of 0.5 g kg-1 or ascorbic acid (200 mg kg-1) had beneficial effects on growth performance, blood metabolites and oxidative status of heat-stressed broiler chicks.
  M.H. Rabie and Hayam M.A. Abo El- Maaty
  An experiment was carried out to evaluate the effect of different dietary protein (CP) levels (24, 22 and 20%) with or without enzyme addition on growth performance of Japanese Quail. At two weeks old, quail were randomly distributed into six experimental groups, each with three equal replications and fed their respective experimental diets and managed similarly. The criteria of response were growth performance (live body weight, weight gain, feed intake, feed conversion ratio and crude protein intake), nutrient digestibility, some carcass traits and blood parameters (total protein, total lipids and total cholesterol, ALT and AST). Apart from the effect of dietary enzyme supplementation, decreasing dietary CP level from 24-20% caused significant reductions in growth performance (live body weight, weight gain, crude protein intake and feed conversion ratio) of quail. Added exogenous enzyme achieved beneficial effects on quail growth performance but feed intake was unaffected compared with the controls, regardless of the effect of dietary protein level. Nutrient digestibility coefficients were significantly depressed when dietary CP level was decreased from 24-20% but added exogenous enzyme produced positive effects on digestibility of nutrients examined. Neither dietary protein level nor enzyme addition had an effect on carcass traits or blood parameters of quail. It can be concluded that an optimal dietary crude protein level for growing Japanese quail is 24% from 14-42 days of age. Added exogenous enzyme is suggested to have a positive effect on growth performance of quail fed the low protein diets.
  M.H. Rabie , Hayam M.A. Abo El- Maaty , M.R. El- Gogary and Marwa Sh. Abdo
  This study was undertaken to evaluate the effect of different dietary levels of Canola Meal (CM) on growth performance and histological responses of broiler chicks. Cobb-500 day-old chicks were randomly distributed to five equal treatments, each of three replications. Ten starter and grower CM-diets (0.0, 10, 12.5, 15 and 20%) were formulated and used for 6 weeks. The chicks were kept in brooding and rearing batteries and fed their respective experimental diets. All chicks were managed similarly. The criteria of response were performance, carcass traits, plasma thyroid hormones and histological characteristics of liver and thyroid. Feeding CM-containing diets (up to 15%) did not adversely affect growth performance or carcass traits but relative weight of thyroid was significantly increased. Increasing dietary CM level up to 20% caused significant increases in feed intake, percentages of abdominal fat and thyroid gland but negatively affected weight gain, feed conversion ratio, bursa relative weight and plasma thyroxin concentration compared with the control chicks. Plasma level of triiodothyronine and activity of alanine aminotransferase were not affected by dietary treatments. Activity of plasma aspartate aminotransferase was significantly increased in chicks fed the highest two levels of CM compared with the control ones. The chicks fed the 20% canola meal diets exhibited progressive changes in the liver architecture and thyroid structure. Taking the histological feature of liver and thyroid, plasma thyroid hormones and growth performance into account, it could be concluded that canola meal can safely be included in broiler diets at a level of 15%.
  M.H. Rabie , F.S.A. Ismail , R.A. Hassan and Ebtehal A.H. Abo Ahmed
  The present study was conducted to determine the effects of single and combined addition of Citric Acid (CA) and Microbial Phytase (MP) on performance, egg quality and mineral utilization of hens fed graded levels of nonphytate phosphorus (NPP). The NPP levels were 0.40, 0.30 and 0.20% without and with MP (0.05%), CA (2.0%) or both. Twelve groups of both 28 weeks old hens and cockerels were fed their respective experimental diets. Criteria evaluated were feed intake, egg production, egg weight, egg mass, feed conversion ratio, egg components, shell thickness, Haugh units, yolk index, tibia ash, tibia Ca, P, Mg, Cu and Zn and apparent retention of these minerals. Feeding the 0.2% NPP diet adversely affected (p<0.01) egg production, egg weight, feed intake, egg mass, feed conversion, percent eggshell, yolk index, shell thickness, tibia ash content and retention of Cu and Zn compared with their positive control. Although birds fed 0.3% NPP gave comparable performance and egg quality to their positive controls, tibia bone ash, tibia contents of Ca and P and retention of P, Cu and Zn of the former were significantly lower than the latter. The poor productive performance and egg quality due to feeding 0.2% NPP diet were completely corrected by MP but CA was not effective. Added MP can effectively prevent the reductions in performance and egg quality and either microbial phytase or citric acid may partially alleviate the depression of mineral utilization in birds fed the low NPP diets, without a synergistic positive effect for their combination.
  M.H. Rabie , F.S.A. Ismail and A.A.S. Ahmed
  An experiment was conducted to investigate the effect of in ovo L-carnitine injection at three incubational ages on hatchability of broiler breeders and post-hatch performance. Four doses of L-carnitine (0.0, 4, 8 and 12 mg/100 μL) were injected into fertile eggs at days 14, 16 and 18 of incubation. Hatched chicks were individually weighed and fertile hatchability was calculated. Birds were kept in batteries and fed common starter and grower diets. Means of weight gain, feed intake and feed conversion were estimated. Mortality was also monitored. A slaughter test was made to evaluate the relative weights of carcass yield, front and hind parts and the edible organs. No deaths occurred during a 7-week feeding trial. Hatchability was unaffected by the injected dose of L-carnitine but it significantly improved when eggs were injected on day 14 of incubation compared with those injected on days 16 or 18. Although, total feed intake of chicks was not affected by in ovo L-carnitine injection, cumulative weight gain was positively affected. Birds hatched from eggs that were injected with L-carnitine at 8.0 or 12.0 mg/100 μL achieved significantly better feed conversion compared with the control group. Injection with 12.0 mg/100 μL positively affected the percentages of front parts but decreased those of liver and gizzard and had no effect on other traits examined. It is concluded that in ovo L-carnitine injection is beneficial for hatchability on day 14 while its injection at 8.0 mg/100 μL on day 16 of incubation is advantageous to subsequent performance.
  F.S.A. Ismail , Hayam M.A. Abo El-Maaty , M.H. Rabie and A.Q. Aswad
  A 12-week study was conducted to evaluate the productive performance of Bovans White laying hens fed high-nutrient-density diets under Egyptian summer conditions. Two hundred hens were randomly assigned to five equal dietary treatments, five replications each. Birds were kept at community cages in an open-sided laying house, provided with a daily photoperiod of 16 h and managed similarly. A control diet was formulated (as fed basis) to contain a metabolizable energy of 2880 kcal kg–1, 17.40% crude protein, 4.35% Ca, 0.43% nonphytate P, 0.84% lysine, 0.41% methionine and 0.70% methionine plus cysteine. Four high nutrient density diets were also compounded to contain 102.5, 105, 107.5 and 110% of the nutrients present in the control diet, thus five mash diets were composed and used from 44-56 weeks of age. The criteria of response were feed intake, egg production, egg weight, egg mass, feed conversion, body weight change, egg components and certain traits of egg quality, nutrient digestibility and some blood plasma parameters. Feeding the high nutrient density diets exerted no positive effect on productive performance of hens, digestibility of nutrients (dry matter, organic matter, crude protein, ether extract, crude fiber, nitrogen-free extract and ash retention), some egg quality traits and most blood parameters examined but positively affected weight change, percent albumen, shell thickness, yolk index and Haugh units. It is concluded that increasing dietary nutrient density up to 110% of the recommended requirements of Bovans White laying hens does not improve their productive performance under Egyptian summer conditions.
  M.H. Rabie , Kh. El. Sherif , A.M. Abd El-Khalek and A.A.A. El-Gamal
  Background: Dietary energy and protein are the most important determinants of least-cost feed formulation. So, the concurrent increase in feed prices and demand on animal proteins for humans necessitate an urgent need to define the optimal dietary protein and energy levels for growing poultry. Materials and Methods: A study with a factorial arrangement of treatments (2×3) was done to investigate the effects of two dietary protein levels (18 and 20% CP), each with three metabolizable energy levels (3100, 3000 and 2900 kcal ME kg–1) on growth performance, nutrient digestibility, carcass traits and blood parameters of Mamourah cockerels. One hundred eighty birds were randomly allocated to 6 experimental groups, each with three replications and kept in floor pens in an open-sided house. Thus, six diets were formulated and fed to the experimental birds and managed similarly from 6-14 weeks of age. Results: Feeding the 20% CP diets throughout the experiment positively affected feed intake and weight gain of cockerels and negatively affected protein efficiency ratio and economic efficiency compared with the 18% CP diets but feed conversion ratio and efficiency of energy utilization were not affected. Conversely, birds fed the 18% protein diets exhibited significantly higher digestibility of dry matter, organic matter, crude protein and ether extract than those fed the 20% protein diets but digestibility of other nutrients were not altered. Dietary protein level had no effect on almost all carcass traits and blood parameters examined. However, decreasing dietary ME level did not affect feed intake or nutrient digestibility but positively affected growth performance. Carcass traits were not affected by decreasing dietary ME level but when it reached 2900 kcal kg–1 percent abdominal fat was significantly reduced and the percentages of carcass yield, total edible parts and liver were negatively affected. Dietary energy level had no effect on plasma constituents of birds but cholesterol concentration decreased when ME level reduced to 3000 or 2900 kcal kg–1. The interactions between dietary protein and energy levels were not significant for most variables examined. Conclusion: Taking the economic aspect into account, optimal dietary CP and ME levels for growing Mamourah cockerels are suggested to be 20% CP and 3000 kcal kg–1.
 
 
 
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