Dehulled-micronised lupin (Lupinus albus L. cv. Multitalia) as the main protein source for broilers: influence on growth performance, carcass traits and meat fatty acid composition

Abstract

A study was carried out to compare the effect of diets containing micronised-dehulled lupin (Lupinus albus L. cv. Multitalia) on growth performance, carcass yields and meat fatty acid profile of broiler chickens. Hubbard strain chicks receiving from 14 d to slaughtering age (49 d) a wheat middlings-based diet containing either deffatted soybean meal (195 g kg(-1), control) or dehulled micromicronised lupins (240 g kg(-1)) as the main protein source were used. The inclusion of treated lupin meal in the diet did not result in lower growth rates of chicks. Lupin diet had no effect on dressing percentage, or breast and drumstick muscles relative weights, but a reduction of abdominal fat content was reported (P < 0.05). White and dark meats of birds fed lupin diet had significant (P < 0.05) lower L* (lightness) values and fat content (P < 0.05). Total collagen and water-holding capacity values were higher in lupin treatment. Feeding the lupin diet resulted in lower saturated fatty acid content in breast and drumstick meat, as well as the n-6/n-3 polyunsaturated fatty acid (PUFA) ratio and saturation, atherogenic and thrombogenic indexes, while total PUFA and monounsaturated fatty acids levels increased (P < 0.05). These results suggest that replacing soybean meal with dehulled-micronised lupin meal in diet for broiler chickens can produce meat with favourable lipid profile and quality, with no adverse effects on productive parameters.