Response of broilers to practical diets with different metabolizable energy and balanced protein concentrations

Abstract

Experiment was conducted to study the effect of Metabolizable Energy (ME) and Balanced Protein (BP) on the performance of 1- to 35-day-old male and female Hubbard x Hubbard broilers. Set in a factorial arrangement, dietary treatments involved 3 levels of ME (2650, 2750, or 2850 kcal per kg diet) and 4 levels of Balanced Protein (expressed as 8.4, 9.0, 9.6, or 10.2 g Standardized Ileal Digestible lysine per kg). Each diet was fed to 5 replicate pens of 17 chicks. Dietary ME and BP did not interact for any of the parameters studied (p>0.05). The main effect of ME was significant (p<0.05) for feed intake, body weight, and feed conversion ratio at all ages. Highest ME (2850 kcal) resulted in 35 day feed intake and feed conversion ratio that was significantly (p<0.05) low compared with those fed on lower levels of ME; while 35 day body weight was significantly (p<0.05) high at 2850 kcal compared with 2650 kcal ME. Feed intake and body weight improved linearly (p<0.05) with increasing BP from 8.4 to 10.2 g per kg, while the BP did not have any effect on feed conversion ratio. Dietary combinations of ME and BP to optimize body weight and feed conversion ratio are suggested on weekly basis

Effect of diets with different energy concentrations on growth performance, carcass characteristics and meat chemical composition of broiler chickens in dry tropics

“…In studies using diets similar to those of the current study, Tancharoenrat and Ravindran (2014) observed that an increase in energy level improved weight gain and feed conversion with no effect on feed intake, while Kim et al (2012) observed reduced feed intake with higher dietary energy. In studies with energy levels lower than those used in the present study, higher dietary ME improved broiler growth performance (Aftab 2009; Ullah et al 2012). …”

Effect of chitosan oligosaccharide and valine on growth, serum hormone levels and meat quality of broilers

“…The supplementation of specific amino acids in corn and soybean basal diets for poultry has gained importance among researchers in attempting to provide the least possible amount of crude protein in formulations of broiler feed (Liu et al, 2019;Sterling et al, 2003). Various dietary formulations have been employed in poultry practices to attain an ideal balance among amino acids in broiler diets (Aftab, 2009;Ayasan et al, 2009;Ayasan & Okan, 2014). It has also been determined that Val is an important nutritional supplement in broiler diets to encourage growth performance and to induce health benefits (Duarte et al, 2014;Ferreira et al, 2016).…”