Effect of phosphorus supplementation on gas production, rumen fermentation and produced amylase and carboxymethyle cellulase activity, in vitro - Nasser, Mohamed E A; Sallam, Sobhy Mohamed Abdallah; Araujo, R C; Abdalla, Adibe Luiz; Vitti, Dorinha Miriam Silber Schmidt (Lucrari Stiintifice. Seria Zootehnie, 2010)