Physical properties of a ultisol in implementation of no-tillage seeding

• Grant number: 17/20003-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: November 01, 2017
• End date: June 30, 2020
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Carolina dos Santos Batista Bonini
• Grantee: Melissa Alexandre Santos
• Host Institution: Faculdade de Ciências Agrárias e Tecnológicas. Universidade Estadual Paulista (UNESP). Campus de Dracena. Dracena , SP, Brazil
• Associated scholarship(s): 19/21681-2 - Quality of an ultisol implementation of the direct seeding system, BE.EP.IC

Abstract

Large areas for agricultural production have been increasingly exploited resulting in degraded soils and consequently reflecting lower productivity since their physical and chemical attributes can be negatively influenced by poor soil use. The objective of this project is to evaluate the effect of intercropped crops between soybean and tropical forage species on the physical properties of a desiccated Ultisol in no-tillage seeding through the evaluation of the physical attributes and a production of the soybean crop. The experiment was carried out at the Faculty of Agrarian and Technological Sciences - UNESP / FCAT, in the municipality of Dracena / SP, from October 2017 to September 2018. The experimental design was used in randomized blocks with four replications, in a 4x2 factorial scheme. four levels of the no-tillage seeding factor, composed of four main treatments and two secondary treatments, being: 1 - Witness with conventional soybean planting; 2 - Direct planting of soybean with forage of Uroclhoa Ruziziensis; 3 - Direct planting of soybean with forage of Uroclhoa Brizantha cv. Paiaguás; 4 - Direct planting of soybean with forage of Uroclhoa Brizantha cv. Piatã; The subplots are different fertilizations, described below: 1 - with potassium fertilization of humic and 2 - with potassic fertilization of cover + Heringer® Humics. How to evaluate the existence of soil physical attributes: aggregate stability, soil porosity, water infiltration, mechanical penetration resistance, soil moisture) and crop production. As the soil analyzes are done in three depths of the soil, from 0.00-0.10; 0.10-0.20 and 0.20-0.40 m. The results are analyzed by performing an analysis of variance, simple correlation and contrasts with 5% probability for a comparison of means. (AU)