Cultura agroenergética em ambientes cascalhentos: relações entre teor de cascalho, atributos do solo e produtividade em plintossolos pétricos originados de rochas metamórficas da formação Couto Magalhães

Abstract

The expansion of soybean cultivation into new agricultural frontiers has promoted the occupation of areas with Petric Plinthosols in the state of Tocantins, Brazil, despite the limitations associated with the high occurrence of petroplinthite and gravel. These materials confer high soil heterogeneity and may influence soil fertility, water availability, root development, plant nutrition, and crop productivity. In this context, this dissertation aimed to understand the relationships among gravel content, soil chemical and particle-size attributes, plant nutritional status, and agronomic traits of soybean grown in Petric Plinthosols developed from metamorphic rocks of the Couto Magalhães Formation, in the municipality of Pium, Tocantins, Brazil. The study integrated the characterization of soil attributes, assessment of plant nutritional status, and analysis of crop agronomic traits to understand soybean responses to the heterogeneity of these environments. The results contribute to advancing knowledge of soil–plant relationships in gravelly environments and provide information to support the development of more efficient and sustainable management strategies for soybean cultivation in Petric Plinthosols.