Meta-analysis of organic selenium and inorganic selenium on performance of laying hens and selenium content in eggs.

He Tao and Dong YiBo and Wang ChangPing and Wei ChunBo

Chinese Journal of Animal Nutrition (2022) 34: 2654–2666

DOI: 10.3969/j.issn.1006-267x.2022.04.059

Abstract

The aim of this study was to determine the effects of supplementing organic selenium or inorganic selenium in the diet of laying hens on their performance and egg selenium content by Meta-analysis. The publications searching for organic selenium and inorganic selenium for laying hens were collected from the databases of CNKI, CQVIP, Wanfang, Web of Science, Science direct and Pub Med. The retrieval period was from January 1, 2015 to July 1, 2021. The Meta-analysis was conducted using Comprehensive Meta Analysis V3 software. A random-effect model was used to calculate the standardized mean difference (SMD) and 95% confidence interval (95% CI). A total of 19 articles out of the identified 1 921 articles (8 249 laying hens) were eligible and included in the Meta-analysis. Publication bias was evaluated by funnel plot, and the source of heterogeneity was explained by Meta-regression analysis and regulatory effect analysis. The results showed as follows:compared with inorganic selenium, supplementation of organic selenium in the diet could increase the laying rate (SMD=0.477%, P=0.005), egg weight (SMD=0.697%, P \textless 0.001), feed to egg ratio (SMD=-1.636%, P \textless 0.001) and egg selenium content (SMD=5.965%, P \textless 0.001) more effectively. At the same time, in the selection of laying hens, Hy-Line brown laying hens were better than Roman laying hens, and the test period was positively correlated with the adding dose in the model. In conclusion, adding organic selenium to the diet is better than inorganic selenium, which provides a useful reference for exploring the application of selenium in laying hen production in the future.

Citation

He Tao, Dong YiBo, Wang ChangPing, & Wei ChunBo. (2022). Meta-analysis of organic selenium and inorganic selenium on performance of laying hens and selenium content in eggs. Chinese Journal of Animal Nutrition, 34(4), 2654–2666. https://doi.org/10.3969/j.issn.1006-267x.2022.04.059 meta-analysis, diets, models, poultry, egg weight, feed conversion efficiency, hens, regression analysis, feed supplements, egg production, eggs, hen feeding, selenium, egg quality, Selenium, Ovum, egg composition

Keywords

• meta-analysis
• diets
• models
• poultry
• egg weight
• feed conversion efficiency
• hens
• regression analysis
• feed supplements
• egg production
• eggs
• hen feeding
• selenium
• egg quality
• Selenium
• Ovum
• egg composition