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Animals 2019, 9(2), 46; https://doi.org/10.3390/ani9020046

The Efficiency of Xylanase in Broiler Chickens Fed with Increasing Dietary Levels of Rye

1
Department of Nutrition Physiology, National Research Institute of Animal Production, 32-083 Balice, Poland
2
Laboratory of Quality Evaluation of Plant Materials, Institute of Plant Breeding and Acclimatization - National Research Institute, Radzikow, 05-870 Blonie, Poland
3
Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, 20-950 Lublin, Poland
4
Department of Comparative Anatomy and Anthropology, Faculty of Biology and Biotechnology, Maria Curie-Skłodowska University, 20-033 Lublin, Poland
5
Department of Physics, Faculty of Production Engineering, University of Life Sciences in Lublin, 20-950 Lublin, Poland
6
Department of Animal Nutrition and Feed Science, Institute of Animal Nutrition and Bromathology, Faculty of Biology, Animal Sciences and Bioeconomy, University of Life Sciences in Lublin, 20-950 Lublin, Poland
7
Department of Swine and Small Animal Breeding, Institute of Animal Science, Faculty of Animal Science, University of Agriculture, 30-059 Krakow, Poland
*
Author to whom correspondence should be addressed.
Received: 17 January 2019 / Revised: 26 January 2019 / Accepted: 29 January 2019 / Published: 31 January 2019
(This article belongs to the Section Poultry)
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Simple Summary

In this study, the effect of xylanase addition to a diet with an increasing content of modern hybrid rye was evaluated. In the first feeding phase (from 1 to 21 days of age), even a low dietary level of rye (5%) decreased the body weight gain of birds. However, results obtained in older birds indicated that modern hybrid rye can be used in up to 20% dietary level in broiler diets from 22 to 42 days of age, especially when the diet is supplemented with xylanase.

Abstract

In this paper, we present a study on the evaluation of the effect of xylanase addition to a diet with an increasing content of modern hybrid rye (Brasetto variety) on the performance indices and viscosity of small intestine content in broiler chickens. A total of 560 1-day-old male Ross 308 chickens were randomly assigned to 1 of 10 treatments, each comprising 7 replicate cages, with 8 male birds per cage. A 5 × 2 factorial arrangement was employed, with five dietary levels of ground rye (0%, 5%, 10%, 15%, and 20%). All the diets were either unsupplemented or supplemented with xylanase (200 mg/kg of feed; with minimum xylanase activity 1000 FXU/g). In the starter rearing period (1–21 days of age), the inclusion of rye (without xylanase supplementation) to the diet, even at the lowest dietary level (5%), negatively affected body weight gain (p < 0.05); there was no effect on feed intake and feed conversion ratio. In older chickens (the grower-finisher rearing period; 22–42 days of age), none of the dietary levels of rye (5–20%) affected growth performance indices. Similarly, no significant effect of increasing dietary level of rye was found for the entire rearing period (1–42 days of age). Diet supplementation with xylanase improved body weight gain and feed conversion ratio in chickens from 1 to 21 days of age. No positive effect of enzyme was found in older birds. No significant effects of the experimental factors used were noticed on the results of slaughter analysis, i.e., the carcass yield, breast meat yield, abdominal fat, and relative weight of the liver and gizzard. A high dietary concentration of rye (20%) increased the viscosity of small intestine content (p < 0.05); however, diet supplementation with xylanase significantly alleviated this effect. The findings of this experiment indicated that modern hybrid rye grain may be used at a 20% dietary level in broiler diets during the second feeding phase, i.e., from 22 to 42 days of age, without any detrimental influence on growth performance indices, while enzyme (xylanase) positively affected body weight gain and feed conversion ratio in younger chicks (1–21 days of age). View Full-Text
Keywords: broiler chickens; rye; xylanase; growth performance; viscosity of small intestine content broiler chickens; rye; xylanase; growth performance; viscosity of small intestine content
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Arczewska-Wlosek, A.; Swiatkiewicz, S.; Bederska-Lojewska, D.; Orczewska-Dudek, S.; Szczurek, W.; Boros, D.; Fras, A.; Tomaszewska, E.; Dobrowolski, P.; Muszynski, S.; Kwiecien, M.; Schwarz, T. The Efficiency of Xylanase in Broiler Chickens Fed with Increasing Dietary Levels of Rye. Animals 2019, 9, 46.

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