Response of broiler chickens to different dietary crude protein and feeding regimens

Abstract

Five isocaloric (3200kcal/kg) diets were used in an experiment designed to investigate the effects of dietary crude protein (CP) and feeding regimens on broiler performance. Day-old broilers were randomly distributed into four groups using a completely randomized design. Each group was replicated three times with ten broiler chicks per replicate. The experiment lasted for eight weeks. Broilers in group 1 received 23% CP from 0 to 3 weeks, 20% CP from 3 to 6 weeks and 18% CP from 6 to 8 weeks, while broilers in group 2 received 23% CP between 0 and 6 weeks and 18% CP between 6 and 8 weeks. Besides, broilers in group 3 were fed 23% CP from 0 to 4 weeks and 16% CP from 4 to 8 weeks, whereas group 4 was given 18% CP from 0 to weeks. Water was supplied ad libitum for broilers in the different dietary groups. A metabolic trial was carried out on the third week of the experiment using a total collection method. Proximate analyses of diets and faecal samples were performed according to the methods outlined by the Association Of the Official Analytical Chemists. Results at market age showed that broiler performance with respect to feed intake, weight gain, feed to gain ratio and water intake were not significantly influenced by CP regimens (p>0.05). Furthermore, CP regimens did not significantly influence broilers liveability (p>0.05). Protein retention, fat utilization and available fiber were not significantly influenced among treatments (p> 0.05). Economic data showed that cost to benefit ratio of producing broilers was comparable among broilers for all CP regimens used in this trial (p>0.05). It was concluded that a single diet of 18% CP and 3200kcal/kg metabolizable energy would be most suitable and convenient for farmers who are engaged in on-farm feed production for broilers as compared with the standard feeding regimens of broiler starter and broiler finisher diets.

Assessment of Heavy Metal Contents in Commercial Feedstuffs and Broiler (Gallus domesticus) Meat and Its Impact on Swiss Albino Mice as an Animal Model

“…Analysis of lipid profile and glucose level in the blood serum of broiler meat for mice treated with different parts of the broiler meat: The biochemical analysis results indicated that the cholesterol, TG, LDL and HDL levels were remarkably higher Nonetheless the vitamin C contents were found to be very low. Protein contents are slightly higher than the standard value, a finding that is identical to earlier studies on chickenfeed materials (Oyedeji et al, 2005;Waldroup 2001). From Table 3, it is also observed that the crude fat content in all groups of meat sample was ranged from 26.18% to 29.05%, which was much higher than that documented in previous studies (Imaobong et al, 2015;Lonergan et al, 2003).…”

Diet matrix of stored proprietary feeds: Implications on growth response, health status and carcass yield of broiler chickens

“…Differences in the digestibility of various feed brands employed in this study are in consonance with the reports of Uchegbu et al (2009). In contrast, Oyediji et al (2005) revealed that nutrient retention total protein level is a pointer to how changes in protein metabolism in the body affect growth rate, health status and meat yield (Adeyemo et al, 2000). Proteins are the major constituents of blood serum and they participate actively in various physiological functions including homeostasis of acid-base balance and colloid osmotic structure.…”

Dietary metabolizable energy and crude protein levels affect pectoral muscle composition and gut microbiota in native growing chickens

“…Excess dietary ME can lead to increased fat deposition and reduced carcass quality, while low CP diets can reduce the energy required to break down dietary protein and excrete excess amino acids, while improving nitrogen utilization and reducing nitrogen emissions ( Girish et al, 2013 ). Oyedeji et al (2005) suggested that 13.38 MJ/Kg is optimal for broiler chickens; while energy level is 12.96 MJ/Kg for broilers at 0 to 4 wk of age and 13.18 MJ/Kg at 4 to 8 wk of age ( Nahashon et al, 2005 ).…”