TANNINS FROM SANGUISORBA OFFICINALIS AFFECT IN VITRO RUMEN METHANE PRODUCTION AND FERMENTATION - A. Cieslak; P. Zmora; A. Matkowski; I. Nawrot-Hadzik; E. Pers-Kamczyc; M. El-Sherbiny; M. Bryszak; M. Szumacher-Strabel (Journal of Animal and Plant Sciences, 2016)