EFFECTS OF: DIETARY LEVEL OF RICE POLISHINGS ON THE PERFORMANCE, NUTRIENTS DIGESTIBILITY AND SOME BLOOD PARAMETERS OF BROILER CHICKS ' | ||||
| Journal of Animal and Poultry Production | ||||
| Article 1, Volume 28, Issue 10, October 2003, Page 7123-7138 PDF (4.81 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2003.245268 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Kh. EI. Sherif, | ||||
| Department of Poultry Production, Faculty of Agriculture, Mansoura University, Egypt. | ||||
| Abstract | ||||
| The present study was carried out to investigate the effect of using rice polishings (RP) in broiler diets on the performance of chicks. Five levels of RP (0.0, 10, 20, 30 or 40%) were used in five starter and five grower diets. All experimental diets were used with or without phytase supplementation (0.0 or 0.4 kg/ton feed). The experimental diets were isoenergetic-isonitrogenous (the starter diets contained ME of about 3200 kcal/kg and CP of about 23%, whereas, the grower diets had ME of about 3100 kcal/kg and CP of about 20%). Three hundred and thirty, one-day-old, broiler- type Hubbard chicks were randomly divided into ten equal experimental groups of 3 replications each. The chicks were fed the starter diets ad libitum up to 21 day-old, then they were switched to the grower diets from 22 to 42 days of age. The criteria of response were live body weight, weight gain, feed intake, feed conversion ratio, mortality rate, carcass traits, nutrients digestibility, some blood constituents (plasma glucose, total protein, total lipids, cholesterol and inorganic phosphorus) and economic efficiency. The obtained results can be summarized as follows: - Using RP in broiler diets up to 40% improved the economic efficiency and did not affect carcass traits, nutrients digestibility, mortality rate or blood parameters of chicks. However, when RP was added at inclusicn rate of 40% of the diet, both marketing live body weight and feed intake of broiler chicks were significantly depressed but the feed conversion ratio was not affected. Supplementation of the diets with phytase significantly increased the body weight of chicks, body weight gain, feed intake and improved the feed conversion ratio. However, enzyme supplementation had no effect on carcass traits, nutrients digestibility and blood constituents in chicks, or on the economic efficiency of the experimental diets. From the previous results, it can be concluded that rice polishings can be used up to 30% of the corn-soybean broiler diets by which good results of broiler performance, carcass traits and economic efficiency can be obtained. Supplementation of the diets with phytase significantly improved the performance of broiler chicks. | ||||
| Keywords | ||||
| rice polishings; phytase; broiler performance | ||||
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