有机铁对猪生长性能影响的Meta分析

Effect of Organic Iron on Growth Performance of Pigs:A Meta-Analysis

铁是动物生长发育必不可少的重要微量元素。有机铁具有高效吸收、良好稳定、绿色环保等优势,逐步被市场认可。本文基于Meta分析评估饲粮中补充有机铁或无机铁对猪生长性能的影响。检索从2001年1月1日至2020年12月31日在CNKI、PubMed和Web of Science数据库中发表的有机铁或无机铁对猪生长性能影响的相关论文。RevMan用于分析猪的平均日增重(ADG)、平均日采食量(ADFI)和增重耗料比(G/F)。随机效应模型用于计算平均差(MD)和95%置信区间(CI)。在确定的478篇文章中,有19篇符合条件并纳入Meta分析(n=1380头猪)。与无机铁相比,有机铁改善了断奶仔猪的ADG(MD=7.97 g/d)、ADFI(MD=2.03 g/d)和G/F(MD=0.01),提高了生长育肥猪的ADFI(MD=66.13 g/d)和ADG(MD=25.07 g/d)。亚组分析解释了异质性的原因,漏斗图评估了发表偏倚。综上所述,饲粮中补充有机铁比补充相同剂量的无机铁更能提高断奶仔猪和生长育肥猪的ADG和ADFI,这为推广有机铁的使用提供了科学依据。

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=1380 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.