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Effects of some pelleting varibles on Pellet Durability index , Hardness and performance in broilers | ||
| علوم و فنون دامپروری | ||
| Volume 9, Issue 37, March 2021, Pages 59-72 PDF (2.11 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/aasrj.2021.353642.1219 | ||
| Author | ||
| Reza Vakili* | ||
| Departement of animal science,Islamic Azad University,Kashmar Branch | ||
| Abstract | ||
| This experiment was conducted to determine the effects of changes in pellet production rate, conditioning temperature, particle size and moisture content on pellet hardness and performance of broilers in a completely randomized design with factorial arrangement. Nine combinations of pelletizing variables were selected as experimental treatments using orthogonal arrays. The hardness and Pellet Durability Index (PDI) were measured for each experimental treatment during the growing and finishing periods during the production process. The data were analyzed using the Taguchi method. The results of this experiment showed that low pellet production rate ,high conditioning temperature, Fine and medium particle size, and moisture addition had a significant effect on PDI and its hardness. While the changes in the performance indices of weight gain, feed conversion ratio and feed intake showed that pellets had better growth performance that produced at low production rate, fine particle size, low conditioning temperature and no moisture content. Based on the results obtained to maintain the growth performance simultaneously and to obtain acceptable pellet durability index and hardness, it is recommended to add moisture to the mash ration without applying high temperatures of conditioning. | ||
| Keywords | ||
| Broiler; Conditioning; Hardness; PDI; Performance | ||
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