Concentrations of TA, CP, CF, UFL, PDIN and PDIE were determined according to the Official Methods of Analysis [7].
Average UFL, CP, CF, TA, PDIN and PDIE contents of forages are presented in figure 2.
DM: dry matter, UFL: Feed Unit for Lactation, CP: crude protein, CF: crude fibre, TA: total ash, PDIN: protein digested in the small intestine when rumen-fermentable nitrogen is limiting, PDIE: protein digested in the small intestine when rumen-fermentable energy is limiting.
In fact, forage quality characteristics were similar between treatments expect for mean CP and PDIN contents.
Con relacion a las fracciones del sistema PDI (TABLA II), se puede apreciar que los valores de
PDIN y PDIE son muy similares, lo cual indica que en la formulacion de los concentrados existe un equilibrio entre los compuestos nitrogenados degradables en rumen y la energia fermentable en rumen.