Degradabilidad in sacco de Festuca arundinacea Schreb (Poaceae) en ovejas (Ovis aries) y llamas (Lama glama).

A. ORTIZ CHURA; A. F. ZUCOL; M.G. FERNÁNDEZ PEPI; G. JAURENA

Lilloa

Fundación Miguel Lillo

Lugar: S.M. de Tucuman; Año: 2016 vol. 53 p. 186 - 192

0075-9481

Fernández Pepi, María G.; Abimael Ortiz Chura; Alejandro F. Zucol; GustavoJaurena. 2016. ?Degradability in sacco of Festuca arundinacea (Poaceae) in sheep (Ovis aries)and llamas (Lama glama)?. Lilloa 53 (2). The degradability of forage is associated to thechemical composition of the cell wall lignification of tissues (characteristic for each species)and accessibility of rumen microorganisms to these polysaccharides. This paper studied comparativelytissue degradation of Festuca arundinacea blade and sheath in camelids and sheeprumen, in order to assess the greater efficiency of camelids to degrade fiber were made.Sheets and sheaths samples were taken, which were subjected to different ruminal incubationtimes to measure the degradation of different tissues, by the in sacco method. No differencesbetween the ability of ruminal degradation of llama and sheep were found (p>0,05). Theanatomy of the blade and the sheath influenced the differential tissue degradation, althoughonly significant differences for sclerenchyma and xylem of both fractions at 24 h of incubationwere found. At 48 h rumen incubation, only they remain of nondigestible tissues , for thevascular system was found. Accessibility to structural carbohydrates of the cell wall by rumenmicroorganisms is determined by the arrangement of the elements of each tissue type andby the chemical composition of the wall.Keywords: Evaluation; Ruminants; Sheath;