木聚糖酶对饲喂小麦日粮的肉鸡回肠粘度、营养物质消化率和生产性能的剂量反应

IF 1.6 3区农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Journal of Applied Poultry Research Pub Date : 2024-09-06 DOI:10.1016/j.japr.2024.100479

J.I. Vargas , J.P. Gulizia , J.R. Hernandez , C.T. Simões , E.G. Guzman , J. Lee , R. Adhikari , S.E. Han , W.J. Pacheco

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引用次数: 0

摘要

本实验研究了添加木聚糖酶对1-42日龄肉鸡生长性能、回肠消化液粘度和营养物质消化率的剂量反应效应。将 1500 日龄的 YPM × Ross 708 雄性肉鸡随机分养在 50 个地面鸡栏中，并分配到 5 个处理中，每个处理有 10 个重复。在每个饲喂阶段，配制一个阳性对照（PC）以满足肉鸡的营养需求，配制一个阴性对照（NC），其AMEn含量比PC低100千卡/千克，并在NC中添加木聚糖酶，添加量分别为1,200（NC + 1,200）、2,400（NC + 2,400）和4,800（NC + 4,800）U/kg。14、28和42日龄时测定采食量、体重和死亡率校正FCR。第 28 d，每栏收集 7 只鸡的回肠消化液，以分析营养物质的消化率和粘度。此外，还在 42 日龄时评估了脚垫皮炎的严重程度和窝的湿度。采用方差分析程序对随机完全区组设计的数据进行分析，并通过 Tukey's HSD 检验来区分平均值，认为 P ≤ 0.05 具有统计学意义。与NC相比，饲喂NC + 4,800 U/kg日粮的肉鸡在14日龄（P < 0.001）和28日龄（P < 0.05）时表现出更高的体重。同样，与 NC 相比，木聚糖酶剂量为 1,200 U/kg或更高时，1-28（P <0.001）和 1-42（P <0.001）日龄的 FCR 也有所提高。此外，与NC相比，饲喂NC并添加各种剂量木聚糖酶的肉鸡可有效降低（P < 0.001）回肠消化液粘度。最后，与NC相比，在NC中添加2,400 U/kg剂量的木聚糖酶可提高CP（P <0.01）和表观回肠总氨基酸消化率（P <0.001）。总之，在以碾碎小麦为基础的日粮中添加递增剂量的木聚糖酶可提高肉鸡的生产性能和营养物质消化率，同时降低回肠消化液粘度。

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Dose response of xylanase enzyme on ileal viscosity, digestibility of nutrients, and performance of broiler chickens fed wheat-based diets

This experiment investigated the dose-response effect of xylanase inclusion on growth performance, ileal digesta viscosity, and nutrient digestibility of broilers fed wheat-based mash diets from 1 to 42 d of age. A total of 1,500-day-old YPM × Ross 708 male broilers were randomly sorted in 50 floor pens and assigned to 5 treatments with 10 replicates per treatment. For each feeding phase, a positive control (PC) was formulated to meet the nutrient requirements of broilers, a negative control (NC) was formulated to contain 100 kcal/kg less AME_n than the PC, and 3 additional treatments were created by including xylanase to the NC at 1,200 (NC + 1,200), 2,400 (NC + 2,400) and 4,800 (NC + 4,800) U/kg. Feed intake, BW, and mortality corrected FCR were determined at 14, 28, and 42 d of age. Ileal digesta was collected from 7 birds per pen on d 28 to analyze nutrient digestibility and viscosity. In addition, the severity of footpad dermatitis and litter moisture were evaluated at 42 d of age. Data were analyzed as a randomized complete block design using the ANOVA procedure and means were separated by Tukey's HSD test, considering statistical significance at P ≤ 0.05. Broilers fed the NC + 4,800 U/kg diet exhibited a higher BW at 14 (P < 0.001) and 28 (P < 0.05) d of age in comparison to the NC. Similarly, improvements on FCR from 1 to 28 (P < 0.001) and 1 to 42 (P < 0.001) d of age were observed with a xylanase dose of 1,200 U/kg and higher, in comparison to the NC. In addition, broilers fed the NC supplemented with xylanase at all doses effectively reduced (P < 0.001) ileal digesta viscosity in comparison to the NC. Finally, xylanase supplementation at a dose of 2,400 U/kg to the NC increased CP (P < 0.01), and apparent ileal total amino acid digestibility (P < 0.001) compared to the NC. Overall, supplementation of mash wheat-based diets with incremental doses of xylanase improved broiler performance and nutrient digestibility while reducing ileal digesta viscosity.

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来源期刊

Journal of Applied Poultry Research 农林科学-奶制品与动物科学

CiteScore

4.10

自引率

10.50%

发文量

审稿时长

104 days

期刊介绍： The Journal of Applied Poultry Research (JAPR) publishes original research reports, field reports, and reviews on breeding, hatching, health and disease, layer management, meat bird processing and products, meat bird management, microbiology, food safety, nutrition, environment, sanitation, welfare, and economics. As of January 2020, JAPR will become an Open Access journal with no subscription charges, meaning authors who publish here can make their research immediately, permanently, and freely accessible worldwide while retaining copyright to their work. Papers submitted for publication after October 1, 2019 will be published as Open Access papers. The readers of JAPR are in education, extension, industry, and government, including research, teaching, administration, veterinary medicine, management, production, quality assurance, product development, and technical services. Nutritionists, breeder flock supervisors, production managers, microbiologists, laboratory personnel, food safety and sanitation managers, poultry processing managers, feed manufacturers, and egg producers use JAPR to keep up with current applied poultry research.