低剂量有机微量元素可减少蛋鸡粪便中的矿物质排泄，且不影响其生产性能。
Low-dose of organic trace minerals reduced fecal mineral excretion without compromising performance of laying hens.
作者信息
Qiu Jialing, Lu Xintao, Ma Lianxiang, Hou Chuanchuan, He Junna, Liu Bing, Yu Dongyou, Lin Gang, Xu Jiming
机构信息
Key Laboratory of Animal Nutrition and Feed in East China of Ministry of Agriculture and College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
Institute of Quality Standards and Testing Technology for Agricultural Products, Chinese Academy of Agricultural Sciences, Beijing 10081, China.
出版信息
Asian-Australas J Anim Sci. 2020 Apr;33(4):588-596. doi: 10.5713/ajas.19.0270. Epub 2019 Jul 2.
OBJECTIVE
The objective of this study was to investigate the effects of low doses of organic trace minerals (iron, copper, manganese, and zinc) on productive performance, egg quality, yolk and tissue mineral retention, and fecal mineral excretion of laying hens during the late laying period.
METHODS
A total of 405 healthy hens (HY-Line White, 50-week-old) were randomly divided into 3 treatments, with 9 replicates per treatment and 15 birds per replicate. The dietary treatments included feeding a basal diet + inorganic trace minerals at commercial levels (CON), a basal diet + inorganic trace minerals at 1/3 commercial levels (ITM), and a basal diet + proteinated trace minerals at 1/3 commercial levels (TRT). The trial lasted for 56 days.
RESULTS
Compared to CON, ITM decreased (p<0.05) egg production, daily egg mass, albumen height, eggshell strength, yolk Fe concentration, serum alkaline phosphatase activity and total protein, and increased (p<0.05) egg loss and feed to egg ratio. Whereas with productive performance, egg quality, yolk mineral retention, and serum indices there were no differences (p>0.05) between CON and TRT. The concentrations of Fe and Mn in the tissue and tibia were changed notably in ITM relative to CON and TRT. Both ITM and TRT reduced (p<0.05) fecal mineral excretion compared to CON.
CONCLUSION
These results indicate that dietary supplementation of low-dose organic trace minerals reduced fecal mineral excretion without negatively impacting hen performance and egg quality.
目的
本研究旨在探讨低剂量有机微量元素（铁、铜、锰和锌）对产蛋后期蛋鸡生产性能、蛋品质、蛋黄和组织矿物质保留率以及粪便矿物质排泄的影响。
方法
总共405只健康母鸡（海兰白，50周龄）被随机分为3组处理，每组处理9个重复，每个重复15只鸡。日粮处理包括饲喂基础日粮+商业水平的无机微量元素（对照组）、基础日粮+1/3商业水平的无机微量元素（无机微量元素组）以及基础日粮+1/3商业水平的蛋白质化微量元素（试验组）。试验持续56天。
结果
与对照组相比，无机微量元素组降低了（p<0.05）产蛋量、日产蛋量、蛋白高度、蛋壳强度、蛋黄铁浓度、血清碱性磷酸酶活性和总蛋白，并增加了（p<0.05）鸡蛋损失率和料蛋比。而在生产性能、蛋品质、蛋黄矿物质保留率和血清指标方面，对照组和试验组之间没有差异（p>0.05）。与对照组和试验组相比，无机微量元素组组织和胫骨中的铁和锰浓度有显著变化。与对照组相比，无机微量元素组和试验组均降低了（p<0.05）粪便矿物质排泄。
结论
这些结果表明，日粮中添加低剂量有机微量元素可减少粪便矿物质排泄，且对母鸡性能和蛋品质无负面影响。
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