An-Najah National University


  • Sunday, February 15, 2009
  • Effect of Light Stimulation and Body Weight on Reproductive Performance of Broiler Breeder Hens
  • Published at: Dirasat/The University Of Jordan
  • An experiment with broiler breeder pullets was undertaken to determine the effect of pattern of light stimulation and pullets body weight at 20 wk of age on various production parameters, body weight and age at onset of lay. Two light stimulation treatments were used: abrupt (ALS) and step-up (SLS). Pullets were randomly assigned to one of three body weight groups: low weight (1800 g), medium weight (2200 g), or heavy weight (2600 g) at 20 wk of age. The results obtained indicated that pattern of light stimulation and weight at 20 wk did not markedly affect egg production, however, pullets exposed to SLS or ALS produced the lightest eggs. A numerical advancement occurred in age at first egg due to SLS. Significant weight gain occurred in low weight pullets due to SLS. The results of this experiment indicated that SLS of low weight broiler breeder pullets represents a viable means for Increasing weight gain and advancing onset of egg laying.
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  • Friday, May 30, 2003
  • Published at:Journal of the Islamic University of Gaza
  • Three broiler trials were conducted to age of 7-days, 21-days and 42-days, for trials I, 2, and 3, respectively. In trial 1, two treatments were used: 1) the control (c) in which chicks received no preventive medication in the form of chlortetracycline (tetracycline HCL); 2) preventive medication (m-7) in which one day old chicks were given a preventive course (for seven days) of chlortetracycline at 0.5 g/L drinking water. In trial 2, three treatments were used: treatments 1 (c) and 2 (m-7) where similar to those in trial 1; however, chicks in treatment 3 (m-10) were given the preventive course for 10 days. In the third trial, four treatments were used, 1) common broiler house clean-out and chicks were given no medication (c-nm); 2) common broiler house clean-out and one day-old chicks were given a preventive

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  • Wednesday, January 1, 2003
  • Effect of Feeding Natural Zeolite on Performance of Laying Hens Drinking ‎Saline Water
  • Published at:Not Found
  • This experiment was conducted to determine the effects of dietary natural zeolite on performance of laying hens receiving saline drinking water (2g NaCl/L). One hundred and twenty 49 weeks old laying hens were randomly assigned (two birds per cage) to 60 cages in a naturally ventilated laying house. Six treatments were examined over a 28-day period. Control hens received town water and a commercial layer diet (TW-LD). Hens of treatment 2 were given town water and were fed a commercial diet supplemented with 10 g/Kg natural zeolite (TW-Z10). The remaining four treatments received the water containing 2g NaCl/L (SalW-) and a commercial diet supplemented with 0, 10, 20, and 30g/Kg natural zeolite for treatments 3 (SalW-LD), 4 (SalW-Z10), 5 (SalW-Z20), and 6 (SalW-Z30), respectively. To account for differences in the amounts of added zeolite, sand was added to the diet in order to keep the resulted diets isoenergetic. Egg production, egg weight, egg mass output, daily water intake feed consumption, feed conversio
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  • Friday, March 1, 1996
  • Environmental Heat Stress Does Not Reduce Blood Ionized Calcium Concentration in Hens Acclimated to Elevated Temperatures
  • Published at: Poultry Science
  • Changes in blood concentrations of ionized calcium and total calcium were measured in broiler breeder hens (42 wk old) relative to egg cycle and environmental temperatures. Two environmental temperature treatments were used: 1) temperature cycled daily from a low of 10 C at 0300 h to a high of 25 C at 1600 h; and 2) temperature cycled from a low of 21 C at 0300 h to a high of 39 C at 1600 h. Serial blood samples  were  collected  from  five   laying  hens   per temperature treatment via cutaneous ulnar vein cannula beginning at the time of oviposition and every 4 h thereafter until the next oviposition. Neither blood concentration of ionized calcium nor total plasma calcium was affected by temperature. Results suggest that the supply of calcium available in blood for shell deposition is not diminished in hens acclimated to high environmental temperatures.
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  • Tuesday, February 20, 1996
  • Interaction of Feeding Time and Temperature and Their Relationship to Performance of the Broiler Breeder Hen
  • Published at: Poultry Science
  •  Experiments with broiler breeder hens were undertaken to determine effect of feeding time and environmental temperature on various production varia­bles, body weight, and feed consumption. Two tempera­ture treatments were used: low cyclic temperature (10 to 25 C), and high cyclic temperature (21 to 39 C). The three feeding treatments were: fed one daily meal either at 0700 h (Treatment 1) or 1800 h (Treatment 2), or one-half the daily amount at 0700 h and the other half at 1800 h (Treatment 3). In another experiment, hens were assigned to feeding times of either 0700 or 1800 h. Feeding time and temperature did not markedly affect
    rate of egg production; however, hens at high tempera­ture fed two meals per day produced the fewest eggs. High temperature caused significant reductions in egg weight, specific gravity, and shell thickness. Feeding time and temperature had no effect on time of oviposition, ovulation, or the transit time of the egg through the oviduct. Significant body weight
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Maen Helmi Abdallah Samara
Animal Science-Non-ruminant Nutrition
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