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Effects of Dietary Protein Levels Enriched with Subtilisin Protease on the Performance and Nutrients Utilization of Broiler Chicks

Effects of Dietary Protein Levels Enriched with Subtilisin Protease on the Performance and Nutrients Utilization of Broiler Chicks

Fahad Shahzad1, Muhammad Tahir1, Abdul Hafeez2, Muhammad Shuaib2*, Muhammad Shahkar Uzair2, Abdul Jabbar3, Abubakar Sufyan4, Muhammad Aamir Khan5, Muhammad Ayaz5, Hameed Ullah5 and Hammad Ullah5

1Department of Animal Nutrition, Faculty of Animal Husbandry and Veterinary Sciences, The University of Agriculture, Peshawar, Pakistan.
2Department of Poultry Science, Faculty of Animal Husbandry and Veterinary Sciences, The University of Agriculture, Peshawar, Pakistan.
3Faculty of Veterinary and Animal Sciences, University of Poonch, Rawalakot. 
4Department of Livestock and Poultry Production, Bahauddin Zakariya University, Multan, Pakistan.
5Livestock and Dairy Development Department, Khyber Pakhtunkhwa, Peshawar.
 
*      Corresponding author: shoaibwzr@gmail.com

ABSTRACT

The study was conducted to investigate the effect of the minimum level of dietary protein and subtilisin protease enzyme on the performance and nutrient utilization in broiler chicks. Different levels of proteins with and without subtilisin protease enzyme were evaluated on the overall performance, carcass yield, and nutrient utilization. For this purpose, 3 proteins and 2 protease levels were arranged in a 3x2 factorial design and each group was divided into 4 replicates of 10 chicks each. All parameters were calculated significantly different. The interaction effect of (P21.5) and enzyme gave the highest feed intake and weight gain value among all the interactions. The highest crude protein was noted for protein level (P19.5) and maximum crude protein was obtained with enzyme treatment. Protein level (P19.5) and treatment having enzyme gave the highest AME. It was noticed that the lowest level of protein gave the highest FCR while the enzyme effect showed decreased FCR. The highest live weight, carcass weight, and carcass yield were recorded with the treatment having the highest level of dietary protein and enzyme. It is concluded that dietary protein in combination with subtilisin protease enzyme has a positive effect on the overall performance and nutrient utilization in the broiler.

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Pakistan Journal of Zoology

October

Pakistan J. Zool., Vol. 56, Iss. 5, pp. 2001-2500

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