Zinc, manganese, and copper amino acid complexes improve performance and bone characteristics of layer-type chicks under thermoneutral and cold stress conditions

Medeiros-Ventura, W.R.L.; Rabello, Carlos Bôa-Viagem; Barros, Mércia Rodrigues; Silva, R.V.; Oliveira, Heraldo Bezerra de; Faria, Andresa G.; Silva, A.F.; Soares, Pierre Castro; Pereira, Camilla Gomes; Santos, Marcos José Batista dos; Fireman, A.K.

doi:10.1016/j.psj.2020.07.022

Cited by 5 publications

(1 citation statement)

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“…On the other hand, zinc sources should solubilize and change into ionic form in order to be absorbed by the enterocytes. However, ionic forms of zinc may be chelated by other substances and become unavailable for the birds [ 21 ]. Today, poultry nutritionists are searching for nutrients that have higher bioavailability to supply precision feeding, in order to reach optimum performance in the farm.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of an Innovative Zn Source on Feed Efficiency, Growth Performance, Skin and Bone Quality of Broilers Suffering Heat Stress

Zaghari

Mehrvarz

Hajati

et al. 2022

Animals

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One thousand two hundred male broilers were used to evaluate the effect of different dosages of HiZox® on feed efficiency, growth performance and bone quality of broilers suffering from heat stress. A completely randomized design was used, with four treatments and ten replicates. Basal corn–soybean meal diets supplemented with 75, 100 and 125 mg/kg zinc from HiZox and 100 mg/kg zinc from regular ZnO were used to make four treatments. Heat stress was induced after the third week by keeping house temperature between 28–34 °C, from 1 pm until 5 pm. The body weights of the birds that received the diet supplemented with HiZox or ZnO showed no significant difference at 7 and 14 days. Body weight of heat stressed birds fed diets containing different levels of HiZox or ZnO were not different at 28 and 42 days of age. In comparison to the Ross 308 management guide, induced heat stress diminished body weight and feed intake by approximately 17 and 21%, respectively. At 28 days, chickens who received 125 mg/kg Zn from Hizox had better feed efficiency (p < 0.05). The mortality rate of heat-stressed male broiler chickens who received different dosages of HiZox was 2.85% less than that of the regular ZnO group (p < 0.06). The results showed that addition of HiZox to the diet of male broiler under heat stress doubled the skin resistance during feather plucking in the slaughter plant and improved carcass quality (p < 0.07). Tibia breaking strength, included elongation and extension were improved by consumption of a diet supplemented with 75 mg HiZox/kg (p < 0.09). The HiZox-75 fed broilers required higher amounts of energy (MJ) for tibia breaking at break and peak points at 42 days (p < 0.09; p < 0.07). Jejunum Zn concentrations reflected the quantity of ingested Zn (p < 0.0001). Gizzard Zn solubility was dependent on dietary treatment (p < 0.03). Solubility of Zn in the gizzard of chickens who received HiZox was higher (about 30%) than broilers fed regular ZnO. In conclusion, Zn from HiZox was more efficient in decreasing heat stress mortality, increasing skin resistance and bone breaking strength compared to a regular ZnO source.

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Section: Introductionmentioning

confidence: 99%