Corn kernel hardness, drying temperature and amylase supplementation affect live performance and nutrient utilization of broilers.

Autor:	Córdova-Noboa HA; Prestage Department of Poultry Science, North Carolina State University, Campus Box 7608, Scott Hall, Raleigh, NC 27695-7608, USA., Oviedo-Rondón EO; Prestage Department of Poultry Science, North Carolina State University, Campus Box 7608, Scott Hall, Raleigh, NC 27695-7608, USA. Electronic address: edgar_oviedo@ncsu.edu., Matta Y; Prestage Department of Poultry Science, North Carolina State University, Campus Box 7608, Scott Hall, Raleigh, NC 27695-7608, USA; University of Tolima, College of Veterinary Medicine and Zootechnia, 730006299 Ibagué, Tolima, Colombia., Ortiz A; Prestage Department of Poultry Science, North Carolina State University, Campus Box 7608, Scott Hall, Raleigh, NC 27695-7608, USA; University of Tolima, College of Veterinary Medicine and Zootechnia, 730006299 Ibagué, Tolima, Colombia., Buitrago GD; Prestage Department of Poultry Science, North Carolina State University, Campus Box 7608, Scott Hall, Raleigh, NC 27695-7608, USA; University of Tolima, College of Veterinary Medicine and Zootechnia, 730006299 Ibagué, Tolima, Colombia., Martinez JD; Prestage Department of Poultry Science, North Carolina State University, Campus Box 7608, Scott Hall, Raleigh, NC 27695-7608, USA; University of Tolima, College of Veterinary Medicine and Zootechnia, 730006299 Ibagué, Tolima, Colombia., Yanquen J; Prestage Department of Poultry Science, North Carolina State University, Campus Box 7608, Scott Hall, Raleigh, NC 27695-7608, USA; University of Tolima, College of Veterinary Medicine and Zootechnia, 730006299 Ibagué, Tolima, Colombia., Hoyos S; Prestage Department of Poultry Science, North Carolina State University, Campus Box 7608, Scott Hall, Raleigh, NC 27695-7608, USA; University of Tolima, College of Veterinary Medicine and Zootechnia, 730006299 Ibagué, Tolima, Colombia., Castellanos AL; Prestage Department of Poultry Science, North Carolina State University, Campus Box 7608, Scott Hall, Raleigh, NC 27695-7608, USA; University of Tolima, College of Veterinary Medicine and Zootechnia, 730006299 Ibagué, Tolima, Colombia., Sorbara JOB; DSM Nutritional Products, 4303 Kaiseraugst, Switzerland.
Jazyk:	angličtina
Zdroj:	Poultry science [Poult Sci] 2021 Oct; Vol. 100 (10), pp. 101395. Date of Electronic Publication: 2021 Jul 24.
DOI:	10.1016/j.psj.2021.101395
Abstrakt:	Drying temperature (DT) of corn can influence its nutritional quality, but whether this is influenced by endosperm hardness is not clear. Two parallel experiments were conducted to investigate the effects of 2 yellow dent corn hybrids with average and hard kernel hardness, dried at 3 temperatures (35, 80, and 120°C), and 2 supplementation levels of an exogenous amylase (0, 133 g/ton of feed) on live performance, starch and protein digestibility, and energy utilization of Ross 708 male broilers. Twelve dietary treatments consisting of a 2 × 3 × 2 factorial arrangement were evaluated using 3-way ANOVA in a randomized complete block design. In Experiment 1, a total of 1,920 male-chicks were randomly allocated to 96 floor pens, whereas 480 day-old chicks were distributed among 96 cages for Experiment 2. At 40 d, interaction effects (P < 0.05) were detected on BWG, FCR, and flock uniformity. Supplementation with exogenous amylase resulted in heavier broilers, better FCR and flock uniformity, only in the diets based on corn dried at 35°C. Additionally, interaction effects were observed on FCR due to kernel hardness and DT (P < 0.01), kernel hardness and amylase supplementation (P < 0.001), and DT and amylase supplementation (P < 0.05). Exogenous amylase addition to the diets based on corn with an average hardness improved FCR up to 2 points (1.49 vs. 1.51 g:g) whereas there was no effect of amylase on FCR of broilers fed diets based on corn with hard endosperm. Total tract retention of starch was increased (P < 0.05) in broilers fed diets based on corn with average kernel hardness compared to hard kernel. Corn dried at 80 and 120°C had up to 1.21% points less starch total tract retention than the one dried at 35°C. Supplementing alpha-amylase resulted in beneficial effects for broiler live performance, energy utilization, and starch total tract digestibility results. Treatment effects on starch characteristics were explored. Corn endosperm hardness, DT and exogenous amylase can influence the live performance of broilers. However, these factors are not independent and so must be manipulated strategically to improve broiler performance. (Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze:	MEDLINE
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