热带条件下补充羟基微量元素（铜、锌和锰）对蛋鸡产蛋性能和蛋品质的影响。
Effect of supplementing hydroxy trace minerals (Cu, Zn, and Mn) on egg quality and performance of laying hens under tropical conditions.
作者信息
Palanisamy Vasan, Pc Sakthivel, Pineda Lane, Han Yanming
机构信息
Department of Animal Nutrition, Veterinary College and Research Institute, Namakkal, Tamil Nadu Veterinary and Animal Sciences University, Tamil Nadu 637002, India.
Trouw Nutrition R&D, 3811, MH Amersfoort, The Netherlands.
出版信息
Anim Biosci. 2023 Nov;36(11):1709-1717. doi: 10.5713/ab.22.0416. Epub 2023 Jun 26.
OBJECTIVE
A pivotal study was designed to investigate the effect of Hydroxy (HYC) Cu, Zn, and Mn on egg quality and laying performance of chickens under tropical conditions.
METHODS
A total of 1,260 Babcock White laying hens (20-wk-old) were randomly assigned to one of 4 treatments with 15 replicates of 21 hens each in a Randomized Complete Block Design. The birds were reared for 16 weeks and were fed the corn-soybean meal diets supplemented with one of the following mineral treatments: T1, inorganic (INO, 15 ppm CuSO4, 80ppm MnSO4 and 80 ppm ZnO); T2, Hydroxy-nutritional level (HYC-Nut, 15 ppm Cu, 80 ppm Mn, 80 ppm Zn from Hydroxy); T3, Hydroxy-Low (HYC-Low, 15 ppm Cu, 60 ppm Mn, 60 ppm Zn from Hydroxy); T4, Hydroxy plus inorganic (HYC+INO, 7.5 ppm HYC Cu+7.5 ppm CuSO4, 40 ppm HYC ZnO+40 ppm ZnSO4, 40 ppm HYC Mn+40 ppm MnSO4). The egg production was recorded daily, while the feed consumption, feed conversion ratio (FCR) and egg mass were determined at the end of each laying period. The egg quality parameters were assayed in eggs collected over 48 h in each laying period.
RESULTS
Overall, no significant effect of treatments was observed on percent egg production, egg weight and FCR (p>0.05). Feed intake was significantly lower in birds fed Hydroxy plus inorganic (p<0.05) diet. The supplementation of HYC-Low significantly increased the egg mass compared to the other treatments (p<0.05). HYC supplementation alone or in combination with INO elicited a positive effect on shell thickness, shell weight, shell weight per unit surface area, yolk colour, albumen and yolk index for a certain period (p<0.05), but not throughout the whole laying period.
CONCLUSION
Dietary supplementation of HYC-Low (15-60-60 mg/kg) showed similar effects on production performance and egg quality characteristics in laying hens as compared to 15-80-80 mg/kg of Cu-Zn-Mn from inorganic sources. This indicates that sulphate based inorganic trace minerals can effectively be substituted by lower concentration of hydroxyl minerals.
目的
设计一项关键研究，以调查羟基（HYC）铜、锌和锰对热带条件下蛋鸡产蛋品质和产蛋性能的影响。
方法
总共1260只巴布考克白蛋鸡（20周龄）被随机分配到4种处理组之一，采用随机完全区组设计，每组15个重复，每个重复21只鸡。这些鸡饲养16周，饲喂补充了以下矿物质处理之一的玉米-豆粕日粮：T1，无机（INO，15 ppm硫酸铜、80 ppm硫酸锰和80 ppm氧化锌）；T2，羟基营养水平（HYC-Nut，15 ppm铜、80 ppm锰、80 ppm锌来自羟基）；T3，羟基低水平（HYC-Low，15 ppm铜、60 ppm锰、60 ppm锌来自羟基）；T4，羟基加无机（HYC+INO，7.5 ppm HYC铜+7.5 ppm硫酸铜、40 ppm HYC氧化锌+40 ppm硫酸锌、40 ppm HYC锰+40 ppm硫酸锰）。每天记录产蛋量，在每个产蛋期结束时测定采食量、饲料转化率（FCR）和蛋重。在每个产蛋期收集48小时的鸡蛋，测定蛋品质参数。
结果
总体而言，处理对产蛋率、蛋重和FCR没有显著影响（p>0.05）。饲喂羟基加无机（p<0.05）日粮的鸡采食量显著较低。与其他处理相比，补充HYC-Low显著增加了蛋重（p<0.05）。单独补充HYC或与INO联合补充在一定时期内对蛋壳厚度、蛋壳重量、单位表面积蛋壳重量、蛋黄颜色、蛋白和蛋黄指数有积极影响（p<0.05），但并非在整个产蛋期。
结论
与15-80-80 mg/kg无机来源的铜-锌-锰相比，日粮补充HYC-Low（15-60-60 mg/kg）对蛋鸡的生产性能和蛋品质特征表现出相似的影响。这表明较低浓度的羟基矿物质可以有效地替代硫酸盐基无机微量元素。
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