Effect of the supplementation of vitamins and organic minerals on the performance of broilers under heat stress

Abstract

The objective of this experiment was to evaluate the effect of diet supplementation with vitamins C and E and organic minerals Zn and Se on the performance of 1 to 35 day-old broilers from, kept under cyclic heat stress (25 to 32ºC). Four levels of vitamin-mineral supplementation were used (T1-control diet (60/30 IU of vit E for starter and growing diet, respectively, zero vit. C, 80 ppm of inorganic Zn, 0.3 ppm of inorganic Se); T2-control diet + 100 UI vit E and 300 ppm vit C/kg; T3-control diet + 40 ppm Zn and 0,3 ppm Se/kg; T4-control diet + T2 and T3 levels) and two environments - thermoneutral and cyclic heat stress (TN and HS) from 14 to 35 days of age. In the period when part of the birds was submitted to HS, from 14 to 35 days, it was observed lower feed intake (FI) and better feed conversion (FC) for HS birds receiving supplementation compared to the group without supplementation. Evaluating the total period, all the types of supplementation provided lower FI and better FC than the control treatment, but not affected weight gain (WG). The supplementation of vitamins C and E and/or organic minerals Zn and Se improved the performance of birds due to a lower FI resulting in better FC, independently on the environment

Effect of dietary supplementation of vitamin E, zinc, and chromium supplementation on growth performance and hematological characteristics of broiler chickens

“…The positive effect of zinc supplementation on feed conversion may be attributed to the improvement in nutrient digestibility and efficiency of their use (Lagana et al, 2007 andSahin et al, 2009) and therefore improve feed conversion ratio. Zinc has a protective role on pancreatic tissue against oxidative damage; it may therefore help the pancreas to function properly, including the secretions of digestive enzymes, thus improving the digestibility of nutrients and consequently, performance.…”

Response to withdrawal of vitamin and trace mineral premixes from finisher diet in broiler chickens under the hot and humid tropical condition

“…Vitamins and trace minerals such as carotenoid, vitamin E, vitamin C, selenium and zinc showed to enhance immunity by maintaining the functional and structural integrity of important immune cells (Chew 1995;Muir et al 2002;Singh et al 2006;Lagana et al 2007). On the contrary, our results indicated that irrespective of duration, withdrawal of VIT and TRM premixes did not influence antibody response against ND vaccinations when compared to controls (Table 3).…”

Efeitos de diferentes fontes e níveis de selênio sobre o desempenho e a imunidade humoral de frangos de corte

“…al., 2001;Singh, et.al., 2006;Laganá et. al., 2007) e concorda com os resultados observados no presente estudo.…”