Abstract
Two experiments were conducted to evaluate the use of various levels of full-fat sunflower seeds (FFSS) on broiler performance and carcass characteristics. In the first experiment, FFSS was included in a basal diet at 70, 140, and 210 g/kg and the AME n values of the experimental diets were determined. The linear regression equation of AME n values on rate of inclusion was calculated. Extrapolation value for the AME n of FFSS at 100% inclusion was 14.22 MJ/kg. In the second experiment, diets containing various levels (0, 70, 140, and 210 g/kg) of FFSS were given to broilers (Ross strain) from 0 to 49 d. At 28 days of age, blood parameters and digestive enzyme activities were determined and carcass parameters were evaluated at 49 days of age. Weight gain, feed intake and feed conversion ratio (FCR) were improved (p<0.05) when broilers were fed various levels of FFSS in the starter and finisher diets. Breast, thigh, gastrointestinal tract and gizzard weight percentages were not affected by dietary treatments; however, liver weight percentage was decreased significantly (p<0.05) and weight of abdominal fat decreased but this effect was not significant. The activities of digestive enzyme (protease and α-amylase) were not influenced by the treatments. Activity of alkaline phosphatase, concentrations of calcium, phosphorus, glucose, triglyceride, protein, high density lipoprotein (HDL) and low density lipoprotein (LDL) were not affected by incorporation of FFSS in the broiler diet. Although concentration of HDL increased and LDL decreased, these effects were not significant. The results of this study indicate that FFSS can be used at up to 21% in broiler diets without adverse effects on performance or other parameters of chickens.
Highlights
INTRODUCTIONAl., 1993) such as soybean seed are used to replace the supplemented fats and oils in broiler diets
Two experiments were conducted to evaluate the use of various levels of full-fat sunflower seeds (FFSS) on broiler performance and carcass characteristics
Formulating high-energy diets for broiler chickens make it Available data from published reports indicate that necessary for inclusion of fats and oils up to 10% in broiler FFSS can be used as a source of nutrients for broiler diets feeds
Summary
Al., 1993) such as soybean seed are used to replace the supplemented fats and oils in broiler diets. Hybrid varieties contain 380 to 540 g of (EE) and is available at a relatively low price This high EE oil/kg (Crum et al, 1993), which is very rich in linoleic acid. Formulating high-energy diets for broiler chickens make it Available data from published reports indicate that necessary for inclusion of fats and oils up to 10% in broiler FFSS can be used as a source of nutrients for broiler diets feeds. In view of the lack of information on the value of FFSS for poultry, the study reported here was initiated to confirm its nutritional worth and to establish its optimal level of inclusion in the diet for broilers in terms of blood parameters, production performance and carcass quality
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