title: The Effect of Yerba Mate (Ilex Paraguariensis) Supplementation on Nutrient Degradability in Dairy Cows: An In sacco and In vitro Study.
abstract: This study was carried out to investigate the effects of Yerba Mate (YM) supplementation on nutrients' degradation, in vitro dry matter disappearance, gas production and rumen ammonia concentration. Three rumen-fistulated Holstein Friesian cows were used for the in situ incubations and provided rumen liquor for in vitro incubations. The inclusion of YM in a control diet (pasture+pellets) affected some in sacco degradation parameters. YM supplementation decreased the effective degradability and degradation rate of pasture crude protein (CP), and it seems to slow down the degradation of pasture neutral detergent fiber. A significant increase of degradation of pasture acid detergent fiber (ADF) was detected after YM inclusion in the control diet. YM supplementation reduced in vitro gas production of pasture and ammonia concentration of pellets. The addition of YM in ruminant diet could decrease ammonia production and increase protein availability for productive purposes. The moderate presence of tannins in YM could have affected the degradation kinetics of pasture CP and ADF and the ammonia production of pellets.
authors.affiliation: Faculty of Veterinary Science, The University of Sydney, PMB 4003, Narellan, NSW 2567, Australia ; Department of Farm Animal Health, Faculty of Veterinary Science, Utrecht University, Yalelaan 7, 3584CL Utrecht, the Netherlands.
authors.forename: Ellen
authors.initials: E
authors.lastname: Hartemink
authors.affiliation: Scuola di Scienze Agrarie, Forestali, Alimentari ed Ambientali (SAFE), Università degli Studi della Basilicata, Viale dell'Ateneo Lucano 10, Potenza, 85100, Italy.
authors.forename: Daniela
authors.initials: D
authors.lastname: Giorgio
authors.affiliation: Faculty of Veterinary Science, The University of Sydney, PMB 4003, Narellan, NSW 2567, Australia.
authors.forename: Ravneet
authors.initials: R
authors.lastname: Kaur
authors.affiliation: Scuola di Scienze Agrarie, Forestali, Alimentari ed Ambientali (SAFE), Università degli Studi della Basilicata, Viale dell'Ateneo Lucano 10, Potenza, 85100, Italy.
authors.forename: Adriana
authors.initials: A
authors.lastname: Di Trana
authors.affiliation: Faculty of Veterinary Science, The University of Sydney, PMB 4003, Narellan, NSW 2567, Australia.
authors.forename: Pietro
authors.initials: P
authors.lastname: Celi
keywords: Dairy Cows; Degradability; In sacco; In vitro; Tannins; Yerba Mate