Journal of Animal Science and Technology
Korean Society of Animal Science and Technology
Article

Efficacy and matrix value of xylanase in broiler fed an energy-deficient corn-wheat-soybean diet

Jun Seon Hong1, Myunghwan Yu1, Shan Randima Nawarathne1, Elijah Ogola Oketch1, Hyeonho Yun2, Dinesh Jayasena3, Jung Min Heo1,*
1Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 34134, Korea.
2Technical Marketing Division, Protein Solution Business Unit, CJ CheilJedang Bio, Seoul 04560, Korea.
3Department of Animal Science, Uva Wellassa University of Sri Lanka, Badulla 90000, Sri Lanka.
*Corresponding Author: Jung Min Heo, Department of Animal Science and Biotechnology, Chungnam National University, Daejeon 34134, Korea, Republic of. Phone: +82-42-821-5777. E-mail: jmheo@cnu.ac.kr.

© Copyright 2024 Korean Society of Animal Science and Technology. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received: Mar 19, 2024; Revised: Mar 28, 2024; Accepted: Apr 04, 2024

Published Online: Apr 05, 2024

Abstract

The experiment was conducted to estimate the matrix value of xylanase and the effect of dietary xylanase supplementation on growth performance, viscosity, digestibility, and carcass traits in broiler chickens. A total of 588 one-day-old Ross 308 broiler chicks were raised with a commercial diet until day 7 and seven-day-old chicks were randomly allotted to one of seven dietary treatments with twelve replicates. Diets were corn-soybean meat based with wheat added. Dietary treatments were as follows; four basal diets (PC, energy sufficient diet; NC-1, -40 kcal/kg ME reduced from PC diet; NC-2, -80 kcal/kg ME reduced from PC diet; NC-3. -120 kcal/kg ME reduced from PC diet) and three different xylanase activity levels diet (NCX-1, 1,500 U/kg xylanase activity; NCX-2, 3,000 U/kg xylanase activity, NCX-3 4,500 U/kg xylanase activity) in the NC-3 diet. The standard xylanase dose was decided from the previous <italic>in vitro</italic> experiment. The weight gain and feed intake were measured and feed efficiency was calculated weekly. One bird per pen was selected and euthanized to harvest the intestinal digesta, breast meat, and leg meat samples on days 24 and 35. The linear and quadratic regression analysis and regression plateau were used to determine the xylanase recommendation and marginal level. The viscosity, digestibility, and proximate analysis of meat were analyzed from taken samples. Xylanase-added treatments were performed for higher (<italic>p </italic>&lt; 0.05) body weight and body weight gain. Furthermore, xylanase-added treatments showed higher protein digestibility and lower viscosity compared to non-xylanase treatment. The maximum metabolizable energy compensation level of xylanase calculated by the regression was 120 kcal/kg and the marginal xylanase level showed maximum performances were 3,622 U/kg on the linear plateau and 4,000 U/kg on the quadratic plateau. Therefore, our experiment suggested that xylanase addition in an energy deficiency diet not only enhances growth performance but also reduces viscosity, and enhances protein digestibility and the maximum compensation level of metabolizable energy was 120 kcal/kg. The recommended levels of xylanase supplementation were determined to be 3,622 and 4,000 U/kg.

Keywords: broiler; carcass triats; digestibility; growth performance; xylanase