Journal of Food, Agriculture and Environment

Vol 20, Issue 1,2022
Online ISSN: 1459-0263
Print ISSN: 1459-0263

Productive performances and carcass yield of broilers fed diet supplemented with protease during summer in tropical environment


Md. Ashraful Islam,   Mohammad Yousuf Miah, Nirmol Kori, Dinabandhu Joardar, Rider A. Perez- Maldonado

Recieved Date: 2021-10-26, Accepted Date: 2021-12-20


The study was conducted in an open-sided house to evaluate the effect of protease on broiler productive performances and meat yield during summer in Bangladesh. In a completely randomized design involving five replicate pens of thirty chickens assigned to each of seven treatments. The corn/ soybean meal based diets include a T0 : Positive control (Cobb breeder recommendations), T1 : Negative control 1 (reduction of 4% CP and 4% digestible amino acid: lysine, M+C, threonine, tryptophan, arginine, isoleucine, and valine), T2 : Negative Control 2 (reduction of 4% CP and 4% digestible amino acid: lysine, M+C, threonine, isoleucine, and valine but not reduction on arginine), T3 : Negative Control 3 (Reduction on 4% CP and 4% digestible amino acid: lysine, M+C, isoleucine, valine but not reduction on threonine and arginine), T4 : T1 + 200 g protease/MT, T5 : T2 + 200 g protease/MT and T6 : T3 + 200 g protease/MT. Diets and drinking water were offered ad libitum. At 35 days birds on the T1 diets without protease supplementation performed significantly lower (P<0.05) when compare with the T0 diet. However, the body weight and feed conversion ratio (FCR) of birds offered T1 +200 g protease/MT and T2 +200 g protease/MT did not differ (P>0.05) from birds offered the T0 (control) diet which was indicative of a positive response due to protease application. There was an increasing trend in breast meat yield with supplementation of protease in the diet. It may be concluded that it is possible to sustain broiler significantly heavier body weight, increase feed efficency and increase breast meat yield by supplementation of protease in low protein diets during summer season


Broiler, summer, stress, protein, protease, production, carcass

Journal: Journal of Food, Agriculture and Environment
Year: 2022
Volume: 20
Issue: 1
Category: Agriculture
Pages: 82-86

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