Livest. Sci. Livest. Sci. Effects of partial substitution of barley with maize and sugar beet pulp on growth performance, rumen fermentation and microbial diversity shift of beef calves during transition from a milk and pasture regimen to a high-concentrate diet Yuste S. Amanzougarene Z. de la Fuente G. Fondevila M. Universidad de Zaragoza de Vega A. Universidad de Zaragoza 2020 research-article