Effects of Supplementing Different Levels of Stinging Nettle Leaf Meal on the Growth Performance of Starter Broilers

Abstract

There is a growing concern by consumers of broiler chickens in Kenya over the injudicious use of antibiotic growth promoters such as oxytetracyclines which has led high tissue residues and consecutively, resistance to the drugs in both livestock and humans. This problem has elicited increased research towards natural alternatives. The current research was thus conducted to determine the optimal dietary inclusion levels of stinging nettle (Urtica dioica L.) leaf meal (NLM) that result to improvements in feed intake (FI), growth rate (GR) and feed conversion efficiency (FCE) of Cobb 500 starter broiler chickens. Four isonitrogeneous (20% crude protein (CP)) and isocaloric (3200 Kcal/kg) diets were formulated; Diet 1 (Control, NLM 0%), Diet 2 (NLM 1%), Diet 3 (NLM 1.5%) and Diet 4 (NLM 2%). Proximate analysis was undertaken for all experimental diets. A total of 48 unsexed chicks were weighed and randomly allocated the experimental diets with 4 replicates of 3 chicks each for 17 days. The FI and body weight gain (BWG) were weighed and recorded daily and weekly respectively. The GR and FCE were also calculated. Results showed that birds supplemented with NLM at 1% had significant mean (162.03g) for FI. Birds supplemented with NLM at 1.5% in the diet had the highest BWG (1930.50g) and GR (113.56g). However, 2% NLM supplemented birds showed the highest FCE (7.98). From the study, it was concluded that supplementing the diets of starter broiler chickens with NLM at 1.5% resulted to the highest BWG and GR.