Effect of nitrogen fertilization on rumen bioavailability of minerals from pasture (pennisetum purpureum) harvested at 60 days

Abstract

The general objective of this study was to quantify the effect of nitrogen fertilization on the rumen bioavailability of minerals of the Pennisetum purpureum grass harvested at sixty days. The methodology used for this purpose was descriptive, with an experimental design, and the investigation was carried out in two stages, the first one at the Pichilingue Tropical Experimental Station (INIAP) and the second in the chemistry laboratory of the university campus of the Equinoccial Technological University, Santo Domingo, Ecuador. The SAS software was decisive to estimate the different parameters of rumen degradability. It is concluded that: a) the degradation kinetics of King grass grass related to its different fractions: soluble (A), insoluble but potentially degradable (B), non-degradable (C), ruminal degradation potential (A+B), were affected. positively by the use of nitrogen fertilization levels, which caused changes in the rumen bioavailability (degradation) of the macrominerals (Ca, P, Mg and K) of the Pennisetum purpureum grass in the different hours of incubation and b) the kinetics of degradation of King grass grass related to its different fractions: soluble (A), insoluble but potentially degradable (B), indegradable (C), rumen degradation potential (A+B), were positively affected by the use of fertilization levels nitrogenous, the same ones that caused changes in the ruminal bioavailability (degradation) of the microminerals (Mn and Cu) of the Pennisetum purpureum grass in the different hours of incubation.