Ali Reza Amouyan Khaveh; Mohammad Amir Karimi Torshizi; Farid Shariatmadari
Volume 18, Issue 1 , April 2016, , Pages 85-94
Abstract
Effect of intermittent mash-pellet feeding programs on broilers performance, ascites susceptibility and economic yield was studied using 480 broilers in six treatments and five replicates of 16 chicks per pen were used in a completely randomized design. Treatments including: 1. Mash feed, 2. Heated-mash ...
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Effect of intermittent mash-pellet feeding programs on broilers performance, ascites susceptibility and economic yield was studied using 480 broilers in six treatments and five replicates of 16 chicks per pen were used in a completely randomized design. Treatments including: 1. Mash feed, 2. Heated-mash feed, 3. Mash feed in starter and grower and pellet feed in finisher, 4. Mash feed in starter and pellet feed in grower and finisher, 5. Pellet feed, 6. Grinded-pellet feed. Pellet feeding increased the feed intake and body weight gain and improved the feed conversion ratio, although the ascites susceptibility increased (P<0.01). Mash feeds decreased the body weight gain and increased the feed conversion ratio (P<0.01). Feeding pellet in finisher resulted in the same feed conversion ratio with feeding pellet for whole period or grower and finisher periods, however feed conversion ratio in pellet fed birds was better than mash fed birds (P<0.01). Feeding pellet for whole period is necessary to obtain maximum feed intake and body weight gain. Feeding mash feed in the first four weeks or whole period reduced the ascites susceptibility (P<0.01). The ascites susceptibility increased by increase in pellet feeding length (P<0.01). Feeding pellet diets reduced the feed cost for a kg live weight production and the increased gross profit compared to mash diets (P<0.05). In order to use the benefits of pellet feed and avoid high mortality rates and ascites susceptibility, it is recommended to start with mash feed and fed pellet in growing and finisher periods.
Mohammad Yazarloo; Seyed Davood Sharifi; Farid Shariatmadari; Abdolreza Salehi
Volume 15, Issue 1 , July 2014, , Pages 1-10
Abstract
In order to determine the optimal levels of energy and protein in grower diet of Japanese quail, 360 dayold Japanese quails were used in a 3×3 factorial arrangement of dietary treatments that comprised threelevels of metabolisable energy (2750, 2850, and 2950 Kcal/kg) and three levels of crude ...
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In order to determine the optimal levels of energy and protein in grower diet of Japanese quail, 360 dayold Japanese quails were used in a 3×3 factorial arrangement of dietary treatments that comprised threelevels of metabolisable energy (2750, 2850, and 2950 Kcal/kg) and three levels of crude protein (24, 26and 28 percent) with four replicates per treatment in a completely randomized design. Feed intake andbody weight were measured weekly and feed conversion ratio was calculated. At 35 d of age, four birds(from both sexes) from each replicate were randomly selected and killed following blood sampling toevaluate carcass traits. The blood samples were assayed for the sera concentrations of growth hormone.Results indicated that birds fed on diets containing 2850 kcal/kg metabolisable energy and 26 percentprotein had higher daily weight gain and better feed conversion ratio and carcass yield (P<0.05). The seraconcentration of growth hormone was higher in birds fed on diet containing 2750 kcal/kg metabolisableenergy (P<0.05). This study indicated that Japanese quails can grow faster and more efficiently on dietcontaining 2850 kcal/kg metabolisable energy and 26 percent protein. Therefore, the diet containing 2850kcal/kg metabolisable energy and 26 percent protein could be recommended as dietary metabolisableenergy and protein requirements for growing Japanese quails.