Rumen bacterial community, indicators of reproduction and milk productivity at different levels of protein concentrate in the diets of dairy cowsNikolay Buryakov, Georgi Laptev, Mariya Buryakova, Larisa Ilina and Dmitry AleshinE3S Web Conf., 282 (2021) 03023DOI: https://doi.org/10.1051/e3sconf/202128203023