Absorption of micronutrients and heavy metals by sorghum plants fertilized with poultry manure

Abstract

The objective of this study was to evaluate the absorption of micronutrients and heavy metals by sorghum plants fertilized with organic composts from broiler litter. The experiment was carried out in greenhouse conditions, and a completely random design, in a factorial arrangement (2x2x3)+, with three replications, totaling 39 plots was used. The treatments consisted of two doses of limestone (2,5 and 5,0 t ha-), two doses of organic composts (broiler litter of pine sawdust, rice hull and peanut hull) and the recommended mineral fertilization as control. The results allowed the following conclusions: the organic compost of the broiler litter of peanut hull increased the absorption of the micronutrients by plants, followed by composts of broiler litter of rice hull and pine sawdust, respectively, in comparison with mineral fertilization, due to differences in chemical composition of the composts; although the root had extracted heavy metals, visual symptoms of toxicity were not noticed.Additional keywords: Sorghum bicolor; organic compost; composting; broiler litter.