Biomassa e nutrientes na serapilheira acumulada em sistemas de integração lavoura-pecuária-floresta em diferentes idades

Abstract

The crop-livestock and forest integration system (CLFi) are characterized by a rational model of use and management of natural resources that study the entire litter component cycle, and how it contributes to maintaining soil fertilization. However, the litter dynamics throughout the development of the CLFi is still poorly understood. Thus, this study aims to quantify the accumulated litter biomass, as well as the nutrient stock, in the CLFi in three different ages. The accumulated litter collection was carried out in the month of rain and drought, the collection areas have as a forest component the hybrid Eucalyptus urograndis with two, four and six years of age. The collection was carried out using a square template (0.0625 m²). The CLFi showed the greatest accumulation of litter at the age of four. The leaf fraction showed the highest proportion of biomass. The litter compartments on average have the same amount of macronutrients. The largest element found was Ca, followed by N. Regarding micronutrients, the highest content was found for the element Fe, followed by Mn.