Degradabilidad ruminal del forraje disponible en la pradera y del aparentemente consumido por vacas lecheras

An experiment was carried out in order to describe the ruminal degradation characteristics of forages, in herbage mass samples (FD) and in simulated grazing samples (FS), obtained at two sward heights (high and low) from a permanent pasture (Lolium perenne L.). The degradation kinetics of the samples was studied using in situ dacron bags. Data collected were fitted according to an exponential equation. The soluble fraction (g/kg DM) of the dry matter (DM) (299 vs. 351, s.e.d.= 5.4), of the organic matter (OM) (304 vs. 376, s.e.d.= 3.3) and of the nitrogen (250 vs. 301, s.e.d.= 6.4) were signif...