Recovery of physical quality of a latosol with grassland and legumes

• Grant number: 16/15370-6
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: October 01, 2016
• End date: September 30, 2018
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Carolina dos Santos Batista Bonini
• Grantee: Beatriz Santos Bisi
• Host Institution: Faculdade de Ciências Agrárias e Tecnológicas. Universidade Estadual Paulista (UNESP). Campus de Dracena. Dracena , SP, Brazil

Abstract

Pastures are the most used in animal feed forms, much of which are in the process of degradation, especially in the state of São Paulo. This work aims to study the physical attributes of an Oxisol cultivated with Brachiaria decumbens pasture in recovery since 2012, with different ways of introducing Estilosantes cv. Campo Grande (Stylosanthes capitata and S. macrocephala), as well as productivity developments thereof. It will use the experimental design of randomized blocks with four replications and composed of seven strategies in direct planting of legumes in the pasture: grass witness braquiária (TB); braquiária + estilosantes partial desiccation 1.5 L ha-1 of glyphosate (DP); braquiária + estilosantes with complete desiccation with 3.0 L ha-1 glyphosate (DT); braquiária + estilosantes with tillage (NT); braquiária + estilosantes with soil scarification (E), braquiária + estilosantes with harrowing rome (G) and pasture + estilosantes plowing + disking (AG). The experiment will take place in São Paulo Agency Agribusiness Technologies - APTA Far West, in the municipality of Andradina / SP October 2016 to September 2017 on soil classified as Oxisol. The assessments to be carried out will be the physical attributes of the soil (aggregate stability, soil porosity, water infiltration, mechanical resistance to penetration, soil moisture), chemical characteristics (phosphorus, potassium, magnesium and calcium, organic matter, pH, acidity potential and calculated the sums of bases, cation exchange capacity and base saturation) and forage production, soil analysis will be made in three layers of the soil, of 0.00 to 0.10; 0.10-0.20 and 0.20-0.40 m. The results will be analyzed by performing an analysis of variance, correlation and simple contrasts at 5% probability for the comparison of means.