Performance and immune response of 1 to 21-day-old broilers fed diets supplemented with organic zinc

Sandra Regina Gomes Da Silva,Daniela Cristina Pereira Lima & Mabell Nery Ribeiro Ribeiro,Daniel Medeiros De Noronha Albuquerque,Elvânia Maria Da Silva Costa Moreira,João Batista Lopes

doi:10.29374/2527-2179.bjvm101120

Sandra Regina Gomes Da Silva, Daniela Cristina Pereira Lima & Mabell Nery Ribeiro Ribeiro + Show 3 more

Open Access

https://doi.org/10.29374/2527-2179.bjvm101120

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Abstract

The objective of this study was to evaluate the effect of levels of zinc in organic form in diets for broilers in the period 1- 21 days on performance and immune response. Were underwent the experimental design completely randomized, with four treatments and five replicates. Treatments consisted of supplementing the diet with organic zinc at different levels (30, 60, and 90 mg/kg) plus an unsupplemented control treatment. The guaranteed levels of supplementary organic zinc (carbon-amino-phospho-chelate) were 100,000 mg/kg. In pre-starter phase, 1 a 7 days, the treatments had a quadratic effect on feed intake (P=0,02) and weight (P=0,06) according were respectively equations: y=-6E-06x2+0,0007x+0,1273 (R2=0,93) e y = -2E-06x2 + 0,0002x+0,1085 (R²=0,76), where the highest values were respectively, in the additional levels of 58.33 and 50.0 mg of zinc/kg diet. The treatments affected of quadratic way the carcass yield and the relative weight of the pancreas, providing higher values in the levels of 47.33 and 75 mg / kg, 44 respectively. The relative heart weight was influenced positively linearly by treatments. It is concluded that supplementing the diet with organic zinc has effects on performance, influence carcass yield, circulatory system and endocrine system in broiler.

Highlights

Nowadays, nutritionists are concerned with improving productivity, and with its synchronization with the welfare and immune capacity of animals
The levels of supplemental organic zinc quadratically influenced the intake. (P = 0.02) according to the equation: y = -6E-06x2 + 0.0007x + 0.1273 (R2 = 0.93), where the highest consumption level was obtained with 60 mg of zinc/kg (Table 3)
These results differ from those found by Namazu et al (2008) that supplementing the diet with organic zinc, in the pre-initial phase did not observe statistical differences in the performance of these animals

Summary

Introduction

Nutritionists are concerned with improving productivity, and with its synchronization with the welfare and immune capacity of animals. Micronutrients such as zinc are becoming increasingly important, which supplementation may be useful for enhancing the performance of birds, acting at the level of the immune system, increasing the resistance of these animals to invasive organisms, and is important for animal welfare. Dietary supplementation with organic zinc is a strategy that can benefit bird performance (Salim et al, 2008) and one of its main functions concerns antioxidant action, as it is related to the ability to prevent radical formation (Sunder et al, 2008) and produces antioxidant responses in broilers (Rao et al, 2016)

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