Effect of organic iron on growth performance of pigs: a meta-analysis. [Chinese]

Ding, HaoXuan and Zhang, Qian and Feng, Jie

Chinese Journal of Animal Nutrition (2021) 33: 4353–4363

Link: http://www.chinajan.com/CN/abstract/html/20210816.htm

Abstract

Iron is an essential trace element for animal growth and development. Organic iron has the advantages of efficient absorption, good stability and environmental protection, which has gradually recognized by the market. The purpose of this study was to investigate the effects of dietary supplementation of organic iron or inorganic iron on growth performance of pigs by Meta-analysis. Relative papers of organic iron or inorganic iron on growth performance of pigs were collected in CNKI, PubMed and Web of Science databases (published from January 1, 2001 to December 31, 2020). RevMan was used to analyze the average daily gain (ADG), average daily feed intake (ADFI) and gain to feed ratio (G/F) of pigs. Random-effects model was used to compute the mean difference (MD) and 95% confidence interval (CI). Of the 478 articles identified, 19 articles were eligible and included in the Meta-analysis (n=1 380 pigs). Compared with the inorganic iron, organic iron improved the ADG (MD=7.97 g/d), ADFI (MD=2.03 g/d) and G/F (MD=0.01) of weaned piglets. Compared with inorganic iron, organic iron increased the ADFI (MD=66.13 g/d) and ADG (MD=25.07 g/d) of growing-finishing pigs. Subgroup analysis explained the heterogeneity and funnel plot assessed publication bias. In conclusion, supplementation of organic iron in the diet can improve ADG and ADFI of weaned piglets and growing-finishing pigs more than supplementation of inorganic iron in the same dose, which provides a scientific basis for promoting the use of organic iron.

Citation

Ding, H. X., Zhang, Q., & Feng, J. (2021). Effect of organic iron on growth performance of pigs: a meta-analysis. [Chinese]. Chinese Journal of Animal Nutrition, 33(8), 4353–4363. http://www.chinajan.com/CN/abstract/html/20210816.htm hogs, pigs, swine, meta-analysis, Animal Nutrition (Production Responses) [LL520], liveweight gain, liveweight gains, Animal Nutrition (Physiology) [LL510], Mathematics and Statistics [ZZ100], microelements, trace elements, growth rate, feed conversion efficiency, feed intake, Feed Additives [RR130], Feed Composition and Quality [RR300], piglets, iron, mineral supplements, inorganic iron

Keywords

• hogs
• pigs
• swine
• meta-analysis
• Animal Nutrition (Production Responses) [LL520]
• liveweight gain
• liveweight gains
• Animal Nutrition (Physiology) [LL510]
• Mathematics and Statistics [ZZ100]
• microelements
• trace elements
• growth rate
• feed conversion efficiency
• feed intake
• Feed Additives [RR130]
• Feed Composition and Quality [RR300]
• piglets
• iron
• mineral supplements
• inorganic iron