Effect of threonine and potassium carbonate supplementation on performance, immune response and bone parameters of broiler chickens

Abstract

This study aimed to investigate the effect of different levels of dietary threonine (i.e. 100%, 110% and 120% of Ross recommendations) and potassium (i.e. 0.85% and 0.94% of diet) on performance, immune response, and bone parameters broiler chickens. Three hundred one-day-old male broiler chickens (Ross 308) were randomly assigned to 1 of 6 dietary treatments in a completely randomized design with a 3 × 2 factorial arrangement. Growth performance was not affected by dietary treatments. Birds fed diet containing 120% threonine and high potassium level were exhibited a lower immune response to phytohemagglutinin-P (PHA-P) as compared to control group (P < .05). Addition of 120% threonine with 0.94% potassium decreased heterophil percentage and heterophil to lymphocyte ratio and increased lymphocyte percentage (P < .05). Tibia and femur width and ash, Ca and P percentage of tibia, and breaking strength of bones were not influenced by dietary potassium level, whereas the width of tibia and femur was increased in broiler chickens received diet containing 120% threonine and 0.94% potassium compared to control group (P < .05). It is concluded that broiler chickens FI during starter period, cell mediated immune response and blood hematology were influence by dietary threonine and potassium interaction.

Interactive effects of threonine levels and protein source on growth performance and carcass traits, gut morphology, ileal digestibility of protein and amino acids, and immunity in broilers

“…The accelerated growth performance observed in the broilers consuming Thr supplemented diets, additionally, because of its role in synthesis of protein and maintenance of body protein turnover (Ton et al, 2013 ). These findings are in agreement with a few recent findings in broilers (Shirzadegan et al, 2015 ; Min et al, 2017 ; Zarrin-Kavyani et al, 2018 ). Min et al ( 2017 ) reported a significant quadratic increase in average daily gain and a quadratic decrease in FCR during the whole experiment (0 to 42 d) with the increase of Thr from 85 to 150% of NRC recommendations.…”

“…An improved growth performance in broilers fed diets containing higher, above NRC recommended, levels of d-Thr may be due to more amount of d-Thr available to satisfy optimum Thr requirement for growth and the gut, which resulted in an improved gut health (Table 4 ) consequently enhanced AIDP and AA (Table 5 ) compared with those fed recommeneded level. Zarrin-Kavyani et al ( 2018 ) observed an improved FI during grower and a higher BW during grower and entire experimental period, whereas a better FCR during the starter period in broilers fed 10% extra Thr in comparison with those consuming the control diet. Shirzadegan et al ( 2015 ), similarly, observed a higher BWG, during the grower as well as over the entire experimental phase, in broilers fed 0.75% d-Thr than that of 0.5% and 1.0% dietary Thr.…”

Supplementation of overripe pulp extract and green peel extract or powder of banana fruit peel (musa. cavendish) to diets of neonatal dairy calves: Effects on haematological, immunological and performance characteristics

“…Similarly, it was reported that potassium acetate increased antibody production on a per cell basis (Fong et al., 1997). In another study, it was showed that potassium supplementation in broiler chicken results in elevation of lymphocyte percentage (Zarrin‐Kavyani et al., 2018). These reports are in agreement with the results of the present study which shows higher values of IgG in calves supplemented with both extracts compared with the calves of groups 1 and 3.…”

2020 Abstracts

“…for immune responses (Runge, Blackall, & Casey, 2007). Threonine (T) is the third limiting AA after lysine and methionine in conventional poultry diets and is required for mucin synthesis as part of the intestinal immune function, inhibition of apoptosis, stimulation of lymphocyte proliferation and enhancement of antibody production (Zarrin-Kavyani, Khatibjoo, Fattahnia, & Taherpour, 2018). Also, arginine (A) and glutamine (G) supplementation may have beneficial effects on performance and immune function under normal rearing conditions (Murakami, Fernandes, Hernandes, & Santos, 2012).…”