Kong Jing, Qiu Ting, Yan Xia, Wang Lili, Chen Zhiyong, Xiao Gengsheng, Feng Xin, Zhang Huihua
School of Life Science and Engineering, Foshan University, Foshan, China.
Laboratory of Livestock and Poultry Breeding, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, China.
Front Physiol. 2022 Oct 18;13:1027834. doi: 10.3389/fphys.2022.1027834. eCollection 2022.
Due to the low bio-availability of inorganic trace minerals, its application in poultry production has been causing many problems such as environment pollution and waste of resources. The current study was designed to evaluate if replacing inorganic trace minerals (ITM) with small peptide chelate trace minerals (SPM) affects production performance, some biochemical parameters and antioxidant status, tibia mineral deposition, and fecal mineral content in 817 white-feathered broilers. A total of 432 broilers (21-day-old) were randomly divided into four groups with six replicates of 18 chicks each. The four groups included inorganic trace minerals group (addition of 1,000 mg/kg ITM; common practice by commercial poultry farms), three organic trace minerals groups with supplementation of 150, 300, and 500 mg/kg SPM, respectively. The experiment lasted for 30 days. The results showed that there was no significant difference in growth performance and slaughter performance among the four groups ( > 0.05). Total cholesterol in the SPM group was significantly lower than those in the ITM groups ( < 0.01). Compared with the ITM group, the serum urea nitrogen in 150 and 300 mg/kg SPM groups decreased significantly ( < 0.01). Among all SPM treatments, 300 mg/kg SPM groups had the highest serum glutathione peroxidase (GSH-Px) activity ( < 0.01). The activity of copper and zinc superoxide dismutase (Cu/Zn SOD) of liver in ITM group was the lowest among the four groups ( < 0.01). The catalase (CAT) activity of liver in the 150 mg/kg SPM group was significantly higher than the ITM group and 300 mg/kg SPM group ( < 0.05). Compared to the ITM group, the iron content of the tibia was significantly increased in 300 mg/kg SPM group ( < 0.05) and 500 mg/kg SPM group ( < 0.01). Compared to the ITM group, dietary supplementation with SPM significantly reduced fecal content of zinc and manganese ( < 0.01). The 150 mg/kg SPM and 300 mg/kg SPM group had significantly reduced content of iron ( < 0.05). This study demonstrated that replacing inorganic minerals with low doses of SPM (300 and 500 mg/kg) did not negatively affect growth and slaughter performance, as well as the antioxidant status of broiler chickens. In addition, SPM can also promote mineral content in the tibia and reduce mineral content in the feces.
由于无机微量矿物质的生物利用率较低，其在家禽生产中的应用引发了诸多问题，如环境污染和资源浪费。本研究旨在评估用小肽螯合微量矿物质（SPM）替代无机微量矿物质（ITM）是否会影响817白羽肉鸡的生产性能、一些生化参数和抗氧化状态、胫骨矿物质沉积以及粪便矿物质含量。总共432只肉鸡（21日龄）被随机分为四组，每组六个重复，每个重复18只雏鸡。四组分别为无机微量矿物质组（添加1000 mg/kg ITM；商业家禽养殖场的常规做法），三个有机微量矿物质组，分别添加150、300和500 mg/kg SPM。实验持续30天。结果表明，四组之间的生长性能和屠宰性能无显著差异（P>0.05）。SPM组的总胆固醇显著低于ITM组（P<0.01）。与ITM组相比，150和300 mg/kg SPM组的血清尿素氮显著降低（P<0.01）。在所有SPM处理中，300 mg/kg SPM组的血清谷胱甘肽过氧化物酶（GSH-Px）活性最高（P<0.01）。ITM组肝脏的铜锌超氧化物歧化酶（Cu/Zn SOD）活性在四组中最低（P<0.01）。150 mg/kg SPM组肝脏的过氧化氢酶（CAT）活性显著高于ITM组和300 mg/kg SPM组（P<0.05）。与ITM组相比，300 mg/kg SPM组（P<0.05）和500 mg/kg SPM组（P<0.01）胫骨中的铁含量显著增加。与ITM组相比，日粮中添加SPM显著降低了粪便中锌和锰的含量（P<0.01）。150 mg/kg SPM和300 mg/kg SPM组的铁含量显著降低（P<0.05）。本研究表明，用低剂量的SPM（300和500 mg/kg）替代无机矿物质不会对肉鸡的生长和屠宰性能以及抗氧化状态产生负面影响。此外，SPM还可以提高胫骨中的矿物质含量并降低粪便中的矿物质含量。
