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Background Rearing systems can affect livestock production directly, but the effects of floor-reared systems (FRSs) and net-reared systems (NRSs) on the intestinal growth states and microbial diversity in the cecum of ducks are largely unclear. Methods The ducklings in this study were randomly divided into FRS and NRS groups, weighed at 4, 8 and 13 weeks, respectively, then the duodenum, jejunum, ileum and cecum were sampled and measured, and the content of cecum were analyzed by 16S RNA.doi:10.21203/rs.3.rs-50639/v1 fatcat:pdmmhcfrmbft7mvz7ferkl6qom