Data regarding diets composition for the article: A meta-analytical approach for evaluating the effect of arginine supplementation on the productive performance of sows during gestation

Arginine (Arg) supplementation for gestating and lactating sows seems to play a primary role in litter development by promoting placental vascularization, and improving colostrum and milk quality. The aim of this study was to investigate the effects of the supplementation of dietary standardized digestible Arg (SID Arg) on the productive performance of gestating sows using a meta-analytical approach. A total of 19 studies conducted between 2007-2020 which tested the effect of additional SID Arg supplementation on sows were chosen using a systematic literature search. Data regarding backfat thickness, total number of piglets born and born alive, number of stillborn piglets, litter birth weight and weaning weight were extrapolated from each experimental group and expressed as a percentage of the value of the control group (CO) within the studies. For all the studies included in the meta-analysis, the chemical composition of the diet was recalculated using EvaPig® software, based on the table of composition published by Sauvant et al. (2004). These data are included in the deposited file.精氨酸（Arginine, Arg）补充剂对妊娠及泌乳母猪的作用，似乎可通过促进胎盘血管化、改善初乳与乳汁品质，在仔猪窝发育中发挥核心作用。本研究旨在采用荟萃分析方法，探究日粮标准化可消化精氨酸（standardized digestible Arg, SID Arg）补充对妊娠母猪生产性能的影响。本研究通过系统文献检索，筛选出2007年至2020年间开展的、共19项探究额外补充SID Arg对母猪影响的相关研究。从各实验组提取背膘厚度、总产仔数、活产仔数、死产仔数、窝初生重及断奶窝重数据，并以研究内对照组（control group, CO）的对应数值为基准，以百分比形式表示。对于本荟萃分析纳入的所有研究，均依据Sauvant等人2004年发布的饲料成分表，使用EvaPig®软件重新计算了日粮的化学成分，相关数据已收录至存档文件中。