ABSTRACT

1. This study investigated the effects of hydroxy trace minerals (HTM) compared to sulphate trace minerals (STM) supplementation on growth performance, carcase parameters and mineral retention in broilers.

2. A total of 1792 male Cobb 500 d-old were allocated in a completely randomised trial design to one of eight dietary treatments with eight replicates per treatment. The HTM sources used were two levels of Cu hydroxychloride (CHC) (low and high), combined with three levels of Zn hydroxychloride (ZHC) (low, med and high) and two additional treatments STM; Cu sulphate monohydrate (CSM) (low and high) combined with high Zn sulphate monohydrate (ZSM). At 21 and 42 d-old growth performance was evaluated. Additionally, at 42 d-old the carcase traits, meat quality, apparent ileal absorption and activity of antioxidant enzymes were accessed.

3. A data showed that broilers receiving high-CHC had higher body weight, weight gain and better feed conversion ratio as compared to low-CHC at 21 d-old. On day 42, the feed conversion ratio was improved for birds supplemented with high-CHC in diets containing med-ZHC, as compared to low-CHC.

4. Dietary Cu increased the redness of breast colour at the level of high-CHC compared to low-CHC. Greater results were observed on carcase traits for the med-ZHC group as compared to low- or high-ZHC. The ceruloplasmin activity in serum increased in the high-CSM diets containing high-ZSM as compared to low-CSM. The AIA of Cu was higher in broilers supplemented with high-CHC containing med-ZHC as compared to low-CHC. Otherwise, the AIA of Zn increased in broilers fed low-CHC containing low- or med-ZHC as compared to high-CHC.

5. The trial showed that mineral trace supplementation of broilers diets with high-CHC (150 mg/kg) and low-ZHC (80 mg/kg) was a good alternative to replace sulphate mineral sources in diets.

摘要

1. 本研究调查了羟基微量矿物质 (HTM) 与硫酸盐微量矿物质 (STM) 补充剂相比对肉鸡生长性能、胴体参数和矿物质保留的影响。

2. 在完全随机试验设计中，总共 1792 名 500 岁的 Cobb 男性被分配到八种饮食治疗中的一种，每个治疗重复 8 次。使用的 HTM 源是两个水平的羟基氯化铜 (CHC)（低和高），结合三个水平的羟基氯化锌 (ZHC)（低、中和高）和两个附加处理 STM；硫酸铜一水合物 (CSM)（低和高）与高硫酸锌一水合物 (ZSM) 结合。在 21 天和 42 天时评估了生长性能。此外，在 42 日龄时，获得了胴体性状、肉质、明显回肠吸收和抗氧化酶活性。

3. 数据显示，与低 CHC 相比，接受高 CHC 的肉鸡在 21 日龄体重、增重和饲料转化率更高。在第 42 天，与低 CHC 相比，在含有 med-ZHC 的日粮中添加高 CHC 的鸡只的饲料转化率有所提高。

4. 与低 CHC 相比，膳食铜在高 CHC 水平下增加了乳房颜色的发红。与低或高 ZHC 相比，在 med-ZHC 组的胴体性状上观察到了更大的结果。与低 CSM 相比，含有高 ZSM 的高 CSM 饮食中血清中的铜蓝蛋白活性增加。与低 CHC 相比，添加含有高 CHC 的 med-ZHC 的肉鸡中 Cu 的 AIA 更高。否则，与高 CHC 相比，饲喂低 CHC 且含有低或中等 ZHC 的肉鸡中 Zn 的 AIA 增加。

5. 试验表明，在肉鸡日粮中添加高 CHC（150 mg/kg）和低 CHC（80 mg/kg）的微量矿物质是替代日粮中硫酸盐矿物质来源的良好替代品。