Departament of Animal Nutrition and Production, Universidade de São Paulo, 13635900 Pirassununga, Brazil.
Department of Animal Science, Universidade de São Paulo 13635900 Pirassununga, Brazil.
Poult Sci. 2019 Oct 1;98(10):4716-4721. doi: 10.3382/ps/pez182.
The objective of this study was to evaluate the effect of different trace mineral supplementation sources in the diet of broiler breeders on their performance and on their progenies. In total, 128 Cobb 500 broiler breeders were distributed according to a completely randomized experimental design in 2 experimental treatments. The control group was fed a diet supplemented with inorganic trace minerals (ITM), while the other group was fed a diet supplemented with reduced levels of trace minerals in the organic form. Eggs were collected when breeders were 35, 47, and 53 wk old. Their progeny (450 hatchlings) were divided according to trace mineral supplementation source from the maternal diet, creating 2 treatments with 16 replicates of 15 birds each. Organic trace mineral (OTM) supplementation improved broiler breeder performance, as shown by higher egg production and better eggshell quality of OTM-fed hens compared with those fed ITM. Egg fertility and hatchability were not influenced by the treatments. As to progeny performance, higher weight gain, and consequently, better feed conversion ratio, were obtained in the 41-day-old progenies of OTM-fed breeders, independently of hen age. Maternal diet trace mineral source did not affect broiler carcass, breast meat, or leg yields. The results of the present study show that supplementing broiler breeder diets with organic trace mineral sources enhances the performance of breeders and their progenies.
本研究旨在评估在种鸡日粮中添加不同微量元素补充源对其生产性能及其后代的影响。总共将 128 只科宝 500 种鸡随机分为 2 个实验组。对照组饲喂添加无机微量元素（ITM）的日粮，而另一组饲喂添加有机微量元素（OTM）且微量元素水平降低的日粮。在种鸡 35、47 和 53 周龄时收集鸡蛋。根据母代日粮中微量元素补充源，将其后代（450 只孵化鸡）分为 2 个处理组，每组 16 个重复，每个重复 15 只鸡。与 ITM 组相比，OTM 组种鸡产蛋性能更高，蛋壳质量更好，表明 OTM 组种鸡生产性能得到改善。OTM 组的蛋受精率和孵化率不受处理组的影响。至于后代的生产性能，OTM 组种鸡后代在 41 日龄时的体重增加更高，因此饲料转化率更好，而与母鸡年龄无关。母代日粮微量元素源对肉鸡屠体、胸肉或腿肉产量没有影响。本研究结果表明，在种鸡日粮中添加有机微量元素源可提高种鸡及其后代的生产性能。
