Effect of Low Protein Diets with Amino Acids Supplementation on Growth Performance, Carcass Traits, Blood Parameters and Muscle Amino Acids Profile in Broiler Chickens under High Ambient Temperature

Ahmed A Saleh,Mahmoud Y Soliman,Mohamed M Soliman,Mustafa Shukry,Wael A Morsy,Khairy A Amber,Mohammed H Alzawqari

doi:10.3390/agriculture11020185

Ahmed A Saleh, Mahmoud Y Soliman + Show 5 more

Open Access

https://doi.org/10.3390/agriculture11020185

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Journal: Agriculture	Publication Date: Feb 23, 2021
Citations: 19	License type: CC BY 4.0

Affiliation: Kafrelsheikh University, Taif University, Ibb University

Abstract

This study evaluates low protein diets with amino acid supplement on growth, biochemical markers and muscle amino acids profile in broilers under high ambient temperature. A total of 480 one-day-old chicks were allocated into three treatments with four replicates (n = 40). Control fed optimal protein and optimal amino acids which contains 23% and 21% crude protein (CP) with 65% methionine + cysteine/ lysine (Met + Cys/Lys) and 55% threonine/lysine (Thr/Lys), LPOA (low protein and optimal amino acids) which contains 21% and 19% CP with 65% Met + Cys/Lys and 55% Thr/Lys and 3. LPHA (low protein and high amino acids) which contains 21 and 19% CP with 74% Met + Cys/Lys and 67% Thr/Lys, respectively during the summer months (The temperatures 32 ± 3 °C, and the relative humidity 72.5% ± 4). Birds fed LPOA diets significantly highest body weight, while those fed LPHA recorded significantly the lowest body weight (BW). Dressing percentages not revealed significantly affected by reducing dietary protein levels, while the blood plasma total protein, albumin, and globulin were not significant differences due to dietary low protein. Chicks fed LPHA diets recorded the highest liver content of malonaldehyde. It could be concluded that feeding the Cobb 500 broilers on low protein diets with the same amino acid levels had no adverse effect on growth, carcass markers, and liver function, however increased amino acids levels to low protein diets may led negative impacts for the broiler performance under high ambient temperature.

Highlights

The chicks of the low protein with optimum amino acid diet (LPOA) group were fed the control starter and grower diets low 2% crude protein (CP) (21 and 19%) with the same content of amino acids
The chicks of the low CP with high amino acid diet (LPHA) group were fed the control starter and grower diets low 2% CP (21% and 19%) with the higher content of amino acids (74% Met + Cys/Lys and 67% Thr/Lys)
Chicks fed a diet containing LPOA and LPHA didn’t register differences compared to C and but differed among them

Summary

Introduction

The most challenges facing the broiler production in Middle East countries is the raised ambient temperature especially in open systems farms. Heat stress trigger considerable reduces in the broilers production owing to adversarial behavioral [2], physiological, and immunological impacts [3,4,5]. The lowering of crude dietary protein with supplementation of amino acids in broiler diets were the effective strategies for reducing the feed cost. On the environmental prospects, feeding low protein diets are an effective strategy for reducing the contamination by reduces the nitrogen and ammonia exit from the farms. Focusing mainly on crude protein (CP) while formulating the broiler diets, is the first step to solving the problem, because raw protein is important and cost-effective elements of the poultry diet

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Discussion

Conclusion