IntroductionBamboo clum powder is an unconventional feed ingredient rich in insoluble dietary fiber, and its potential application and optimal inclusion level in laying hen diets remain unclear. This study was conducted to evaluate the effects of dietary supplementation with micronized bamboo powder (MBP) on laying performance, apparent nutrient digestibility, intestinal morphology, and cecal microbiota in late-laying hens, and to determine its appropriate inclusion level.MethodsA total of 480 4