Contenido mineral y de nutrientes de ensilados de rastrojo de maíz con excretas pecuarias y subproductos ricos en carbohidratos.

This research was carried out to determine the effect of corn stover silage with three non-protein nitrogen sources plus two carbohydrate sources on its mineral content. Nitrogen sources (NS) were agricultural urea (AU), dehydrated poultry litter (PL) and swine manure fresh (SM); and those of carbohydrates (CS) sugar cane molasses (SCM) and bakery by-products (BBP). After 30 d of fermentation, the microsilages were opened and the concentration of Ca, P, Na, K, Mg, Co, Cu, Mn, Fe, and Zn were measured. The results were subjected to analysis with a completely randomized design with a 3×2 factorial arrangement of treatments and under a mixed effects model. There were (P<0.01) NS×CS interactions on the mineral content of all silages. The PL+SCM silage was higher (P<0.01) in Ca, P, Na, Mg and K. The SM silage had higher (P<0.01) Cu content, and the PO-based treatments had higher (P< 0.01) Mn content. In general, the highest mineral content was observed in silages based on PL and SM. It is concluded that corn stover silage enriched with PL with SCM can provide macro and micro minerals in ruminant feed. [ABSTRACT FROM AUTHOR]