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

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.

Choline diet improves serum lipid parameters and alters egg composition in breeder ducks

“…Additionally, choline metabolism is also related with the Met cycle, which can provide a methyl‐group donor and facilitate the conversion of homocysteine to Met (Wang, 2012). This may imply that choline dietary supplementation could reduce the consumption of Met and improve the utilisation of protein in some low‐protein diets, which are advocated because of their low cost and utility in improving heat stress in poultry (Saleh et al., 2021). In addition, our study also found that the increasing trend of HDL‐C introduced by choline supplementation is consistent with the high‐density lipoprotein trend precipitated by a low‐protein diet (Salah, 2016).…”

Impact of Feed Low-Protein Diets During Starting Period of Diets Fortified with Amino Acids on Productive Performance and Blood Parameters of Broiler Chickens

“…Similarly, Nukreaw and Bunchasak (2015) demonstrated that, between 1 and 21 days of age, adding Met + Lys to lowprotein diets (Low-CP + Met + Lys) significantly increased broiler chick body weight and FCR compared to those fed Low-CP diet, even while feeding the conventional diet group still produced the most (P 0.01).. Purified amino acidsupplemented chickens had greater body weights than control birds (Wandita et al, 2018). Chicks fed a diet low in protein and high in amino acids (Met, Lys and Thr) significantly recorded the highest BW (Saleh et al, 2021).…”

Effects of ambient temperature on the growth performance, fat deposition, and intestinal morphology of geese from 28 to 49 days of age

“…Therefore, it is vital to keep the ambient temperature stable and appropriate during the life cycle of poultry in consideration of the economic benefits and poultry welfare. The optimal performance temperature for growing broilers has been reported to range from 18 to 24°C ( Saleh et al, 2021 ). In Pekin ducks, the upper critical ambient temperatures for starter ducks and growing ducks were 31.3 and 27°C, respectively ( Sun et al, 2019 ; Xie et al, 2019 ).…”