Effect of feed form and nutrient density on body weight, intestinal morphology and gizzard muscle thickness in broiler breeder pullets | ||
| علوم دامی | ||
| Volume 37, Issue 144, December 2024, Pages 121-132 PDF (1.77 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/asj.2024.362318.2314 | ||
| Authors | ||
| anvar amouzmehr1; Behrouz Dastar* 2; Omid Ashayerizadeh3; Reza Mirshekar4; reza Abdollahi5 | ||
| 1Department of Animal and Poultry Nutrition, Faculty of Animal Science, Gorgan University of Agricultural Sciences and Natural Resource | ||
| 2Gorgan University of Agricultural Sciences and Natural Resources | ||
| 3Gorgan University of Agricultural Sciences and Natural Resources, Basij Square, Gorgan, Golestan, Iran | ||
| 4Gorgan university of agricultural sciences and natural resources | ||
| 5Monogastric Research Centre, School of Agriculture and Environment, Massey University, New Zealand. | ||
| Abstract | ||
| A total of 450 Ross 308 female broiler breeder pullets were distributed into 30 experimental units with 6 treatments and 5 replicates with 15 birds per each. The experiment was performed in a a completely randomized design with a factorial 2 × 3 arrangement consisted of 3 feed forms (mash, crumble, and pellet) and 2 levels of nutrient density (standard diet and diluted diet to 90% standard) in the grower and pre-breeder periods. The results showed that feed form in the diluted diet had no significant effect on the weight of broiler breeder pullets during the grower period, while the use of pellet feed compared to mash feed in the standard diet caused a significant increase in body weight (P< 0.05). Pellet and crumble feeds compared to mash feed in the pre-production period caused a significant increase in body weight and diet dilution caused a significant decrease in the body weight of broiler breeder pullets (P<0.05). Neither feed form nor nutrient density significantly affected jejunum villi morphology (P> 0.05). The use of pellet feed compared to mash feed caused an increase in the thickness of the gizzard dorsal muscles (P< 0.05). Based on the results of this experiment, the use of pellet or crumble diets containing nutrients recommended levels can cause problems in weight control in broiler breeder pullets due to increased weight, but diluting the diet to 90% of the nutrients recommendation are effective to a large extent in controlling body weight. | ||
| Keywords | ||
| Broiler breeder pullets; feed form; diluted diet; performance | ||
| References | ||
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