饲粮中添加植酸酶对营养缺乏肉鸡的影响

IF 1.9 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Samuel Oliveira Borges , Tiago Goulart Petrolli , Melissa Izabel Hannas , Romário Duarte Bernardes , Carlos Henrique de Oliveira , Kelly Morais Maia Dias , Bruno Figueiredo de Almeida , Lucimauro da Fonseca , Alex Filipe Ramos de Sousa , Arele Arlindo Calderano
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引用次数: 0

摘要

本试验旨在评价不同植酸酶添加水平对饲粮低营养水平肉鸡生产性能、体成分、血液指标和骨骼特征的影响。试验选用1400只雄性肉鸡,采用完全随机设计,分为7个处理,每处理10个重复,每个试验单元20只鸡。试验处理为:阳性对照,配制充分满足禽类营养需求;阴性对照1 (NC1)、阴性对照2 (NC2)和阴性对照3 (NC3),根据植酸酶养分释放基质进行养分还原配制,但不添加酶;NC1、NC2和NC3分别添加500、750和1000 FTU植酸酶。与阴性对照组相比,添加植酸酶可提高(P < 0.05)体增重、饲料系数和最终体重,即使在有效磷(P)、总钙(Ca)、总钠、代谢能、粗蛋白质和可消化氨基酸同时降低的饲粮中,这些参数也恢复到与阳性对照组相当的水平。血清钙、磷水平、骨指标(包括Seedor指数、断骨强度、灰分和镁浓度)均与阳性对照组相当(P < 0.05)。植酸酶的补充进一步提高了体成分,添加植酸酶的禽类瘦组织、蛋白质和骨骼的沉积量增加(P < 0.05)。本研究的主要贡献是确认了植酸酶作为具有挑战性的饮食中的营养工具的有效性,证明了其恢复性能和骨质量的能力,其益处超出了磷的利用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of phytase supplementation on broiler chickens fed nutrient-deficient diets
This study aimed to evaluate the effects of different inclusion levels of phytase on the performance, body composition, blood parameters, and bone characteristics of broilers fed reduced-nutrient diets. The experiment was conducted using 1400 male broilers, allocated to seven treatments with ten replicates and twenty birds per experimental unit, in a completely randomized design. The experimental treatments were: positive control, formulated to fully meet the birds’ nutritional requirements; negative control 1 (NC1), negative control 2 (NC2) and negative control 3 (NC3), formulated with nutrient reductions according to the phytase nutrient release matrix but without enzyme supplementation; and NC1, NC2 and NC3 supplemented with 500, 750 and 1000 FTU of phytase. Phytase supplementation improved (P < 0.05) body weight gain, feed conversion ratio, and final body weight compared to the negative controls, restoring these parameters to levels comparable with the positive control, even in diets simultaneously reduced in available phosphorus (P), total calcium (Ca), total sodium, metabolizable energy, crude protein, and digestible amino acids. Improvements were also observed in serum Ca and P levels, as well as in bone indicators, including the Seedor index, bone breaking strength, and ash and magnesium concentrations, matching those of the positive control (P < 0.05). Phytase supplementation further enhanced body composition, with greater deposition of lean tissue, protein, and bone in supplemented birds (P < 0.05). The main contribution of this study is the confirmation of phytase’s effectiveness as a nutritional tool in challenging diets, demonstrating its capacity to recover performance and bone quality, with benefits that extend beyond phosphorus utilization.
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来源期刊
Livestock Science
Livestock Science 农林科学-奶制品与动物科学
CiteScore
4.30
自引率
5.60%
发文量
237
审稿时长
3 months
期刊介绍: Livestock Science promotes the sound development of the livestock sector by publishing original, peer-reviewed research and review articles covering all aspects of this broad field. The journal welcomes submissions on the avant-garde areas of animal genetics, breeding, growth, reproduction, nutrition, physiology, and behaviour in addition to genetic resources, welfare, ethics, health, management and production systems. The high-quality content of this journal reflects the truly international nature of this broad area of research.
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