饲粮锌对高温应激雪山草鸡生长性能、营养物质表观消化率和血清生化指标的影响  

Effect of Dietary Zinc on Growth Performance,Apparent Digestibility and Serum Biochemical Indices of High-temperature Stressed Xueshan Broilers

作　　者：孙鹏飞 王晓涵 胡云 吴慧光 赵静雯 罗绪刚 SUN Pengfei;WANG Xiaohan;HU Yun;WU Huiguang;ZHAO Jingwen;LUO Xugang(College of Animal Science and Technology,Yangzhou University,Yangzhou 225009,China;College of Veterinary Medicine,Yangzhou University,Yangzhou 225009,China)

机构地区：[1]扬州大学动物科学与技术学院,扬州225009 [2]扬州大学兽医学院,扬州225009

出　　处：《中国畜牧兽医》2024年第11期4732-4742,共11页China Animal Husbandry & Veterinary Medicine

基　　金：江苏省“双创团队”(JSSCTD202147)。

摘　　要：【目的】评估不同形态和剂量的锌对高温应激环境中雪山草鸡生长性能、表观消化率和血清生化指标的影响,以期为高温环境下雪山草鸡的锌营养提供参考。【方法】试验采用2(锌源)×2(锌添加水平)两因子完全随机设计,2种锌源分别为无机硫酸锌和中等螯合强度蛋白锌,2种锌添加水平分别为30和60 mg/kg,共4个试验组;另设1个满足肉鸡锌需要量的对照组。选取320只61日龄雪山草鸡,随机分配到5个组中,每个处理8个重复,每个重复8只鸡。预试期7 d,正试期28 d,均在高温应激条件下进行。分别在试验第14(75日龄)和28(89日龄)天时采集饲料样、粪样和血样,用于测定肉鸡的生长性能、养分表观消化率和血清生化指标。【结果】①锌源、锌添加水平及两因子互作对高温应激肉鸡的生长性能均无显著影响(P>0.05)。②与对照组相比,饲粮中添加锌显著提高了肉鸡粗蛋白质和粗脂肪的表观消化率(P<0.05)。锌源对干物质的消化率有显著影响,在锌源主效应上,与饲粮中添加无机硫酸锌相比,添加中等螯合强度蛋白锌显著降低了高温应激肉鸡的干物质表观消化率(P<0.05)。③与对照组相比,饲粮中添加锌显著提高了试验第14天时肉鸡血清中总蛋白、白蛋白和球蛋白含量(P<0.05),以及显著提高了试验第28天时肉鸡血清中总蛋白和白蛋白含量(P<0.05)。锌源对试验第14天时肉鸡血清中总蛋白和白蛋白含量有显著影响(P<0.05);锌水平对试验第14天时肉鸡血清中总蛋白、白蛋白和球蛋白含量,以及试验第28天时肉鸡血清中总蛋白和白蛋白含量有显著影响(P<0.05);锌源×锌水平交互对试验第14天时肉鸡血清中总蛋白含量和试验第28天时肉鸡血清中白蛋白含量均有显著影响(P<0.05),其中饲粮中添加60 mg/kg中等螯合强度蛋白锌作用效果最佳。④在锌源、锌水平和锌源×锌水平互作效应上,饲粮中添加锌对高温应【Objective】The aim of this study was to assess the effect of diverse forms and doses of zinc on the growth performance,apparent digestibility and serum biochemical indices of Xueshan broilers subjected to high-temperature stress conditions,so as to provide a reference for zinc nutrition of Xueshan broilers in high-temperature environments.【Method】The experiment employed a 2(zinc sources)×2(zinc supplementation levels)completely randomized factorial design.The 2 zinc sources were inorganic zinc sulphate and moderate chelated zinc proteinate,and 2 zinc supplementation levels were 30 and 60 mg/kg,resulting in a total of four experimental groups.In addition,a control group was established to meet the zinc requirement of broilers.A total of 32061-day-old Xueshan broilers were randomly divided into five groups,with eight replicates per treatment and eight birds per replicate.The pre-trial period was 7 d,followed by a formal trial period of 28 d,both conducted under high-temperature stress conditions.Samples of feed,faeces and blood were collected on days 14(75 days of age)and 28(89 days of age)of experiment for determining the growth performance,apparent digestibility of nutrients and serum biochemical indices of broilers.【Result】①The zinc source,zinc supplementation level and their interaction had no significant effect on the growth performance of broilers under high-temperature stress(P>0.05).②Compared with control group,dietary zinc supplementation significantly increased the apparent digestibility of crude protein and crude fat in broilers(P<0.05).The zinc source had a significant effect on the digestibility of dry matter.In the main effect of zinc source,the addition of moderate chelated zinc proteinate significantly decreased the apparent digestibility of dry matter in high-temperature stressed broilers compared with the addition of inorganic zinc sulfate(P<0.05).③Compared with control group,dietary zinc supplementation significantly increased the serum levels of total protein,albumin and globu

关 键 词：锌 高温应激 雪山草鸡 生长性能 表观消化率 血清生化指标 

分 类 号：S816.72[农业科学—饲料科学]