Copper and Zinc Availability in Soils Amendment with Feedlot Manure

RAMOS, MA. LAURA; MOSCUZZA CARLOS HERNÁN; FERNANDEZ CIRELLI, ALICIA

World Applied Sciences Journal

International Digital Organization for Scientific Information

Año: 2018 vol. 36 p. 589 - 597

1818-4952

The aim of the present work is the feasibility study of the application of feedlots manure on the growth and Cu and Zn enrichment of forage species for animal feeding. Pot experiments were performed by employing the forage species, Lolium perenne (?perennial ryegrass?) and Trifolium repens (?white clover?)and the fertilization was conducted with cattle manure coming from feedlots (IS) and extensive production systems (ES). The experiment results revealed an increase in dry matter yield (DMY) and all morphological parameters analyzed in pots fertilized with feedlot manure in comparison with controls (p value< 0, 05; except for root length in T. repens p value=0.0752). Besides, the addition of feedlot manures increased Cu and Zn concentration in aerial plant biomass at first harvest for both forage species studied. We concluded that feedlot manure provides soluble forms of Cu and Zn when applied as organic amendments reflected in an increased of both metals in forages tissues that could satisfy animal requirements if they are consumed at early development stages. This in turn contributes to reduced environmental impact caused by the accumulation of excreta during long periods in farms.