Evaluation of an Innovative Zn Source on Feed Efficiency, Growth Performance, Skin and Bone Quality of Broilers Suffering Heat Stress
One thousand two hundred male broilers were used to evaluate the effect of different dosages of HiZox<sup>®</sup> 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 replicat...
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| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Animals |
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| Online Access: | https://www.mdpi.com/2076-2615/12/23/3272 |
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| author | Mojtaba Zaghari Hossein Mehrvarz Hosna Hajati Hossein Moravej |
| author_facet | Mojtaba Zaghari Hossein Mehrvarz Hosna Hajati Hossein Moravej |
| author_sort | Mojtaba Zaghari |
| collection | DOAJ |
| description | One thousand two hundred male broilers were used to evaluate the effect of different dosages of HiZox<sup>®</sup> 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 (<i>p</i> < 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 (<i>p</i> < 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 (<i>p</i> < 0.07). Tibia breaking strength, included elongation and extension were improved by consumption of a diet supplemented with 75 mg HiZox/kg (<i>p</i> < 0.09). The HiZox-75 fed broilers required higher amounts of energy (MJ) for tibia breaking at break and peak points at 42 days (<i>p</i> < 0.09; <i>p</i> < 0.07). Jejunum Zn concentrations reflected the quantity of ingested Zn (<i>p</i> < 0.0001). Gizzard Zn solubility was dependent on dietary treatment (<i>p</i> < 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. |
| first_indexed | 2024-03-09T17:55:05Z |
| format | Article |
| id | doaj.art-3cb7646b9cb142fb96bb84b6b0c14c72 |
| institution | Directory Open Access Journal |
| issn | 2076-2615 |
| language | English |
| last_indexed | 2024-03-09T17:55:05Z |
| publishDate | 2022-11-01 |
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| spelling | doaj.art-3cb7646b9cb142fb96bb84b6b0c14c722023-11-24T10:24:21ZengMDPI AGAnimals2076-26152022-11-011223327210.3390/ani12233272Evaluation of an Innovative Zn Source on Feed Efficiency, Growth Performance, Skin and Bone Quality of Broilers Suffering Heat StressMojtaba Zaghari0Hossein Mehrvarz1Hosna Hajati2Hossein Moravej3Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj 1417466191, IranDepartment of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj 1417466191, IranAnimal Science Research Department, East Azarbaijan Agricultural and Natural Resources Research and Education Center, AREEO, Tabriz 5153715898, IranDepartment of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj 1417466191, IranOne thousand two hundred male broilers were used to evaluate the effect of different dosages of HiZox<sup>®</sup> 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 (<i>p</i> < 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 (<i>p</i> < 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 (<i>p</i> < 0.07). Tibia breaking strength, included elongation and extension were improved by consumption of a diet supplemented with 75 mg HiZox/kg (<i>p</i> < 0.09). The HiZox-75 fed broilers required higher amounts of energy (MJ) for tibia breaking at break and peak points at 42 days (<i>p</i> < 0.09; <i>p</i> < 0.07). Jejunum Zn concentrations reflected the quantity of ingested Zn (<i>p</i> < 0.0001). Gizzard Zn solubility was dependent on dietary treatment (<i>p</i> < 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.https://www.mdpi.com/2076-2615/12/23/3272broilerperformanceheat stressHiZoxzinc oxide |
| spellingShingle | Mojtaba Zaghari Hossein Mehrvarz Hosna Hajati Hossein Moravej Evaluation of an Innovative Zn Source on Feed Efficiency, Growth Performance, Skin and Bone Quality of Broilers Suffering Heat Stress Animals broiler performance heat stress HiZox zinc oxide |
| title | Evaluation of an Innovative Zn Source on Feed Efficiency, Growth Performance, Skin and Bone Quality of Broilers Suffering Heat Stress |
| title_full | Evaluation of an Innovative Zn Source on Feed Efficiency, Growth Performance, Skin and Bone Quality of Broilers Suffering Heat Stress |
| title_fullStr | Evaluation of an Innovative Zn Source on Feed Efficiency, Growth Performance, Skin and Bone Quality of Broilers Suffering Heat Stress |
| title_full_unstemmed | Evaluation of an Innovative Zn Source on Feed Efficiency, Growth Performance, Skin and Bone Quality of Broilers Suffering Heat Stress |
| title_short | Evaluation of an Innovative Zn Source on Feed Efficiency, Growth Performance, Skin and Bone Quality of Broilers Suffering Heat Stress |
| title_sort | evaluation of an innovative zn source on feed efficiency growth performance skin and bone quality of broilers suffering heat stress |
| topic | broiler performance heat stress HiZox zinc oxide |
| url | https://www.mdpi.com/2076-2615/12/23/3272 |
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