Evaluation of chemical attributes of soils: definition of management zones in silvipastoral system

  • Reinaldo Baldotto Ribeiro Filho Programa de Pós-graduação em Agroquímica. Universidade Federal do Espírito Santo (UFES), Alto Universitário, s/n, Cx. Postal 16, CEP: 29500-000, Alegre, ES, Brazil.
  • Carlos Henrique Rodrigues de Oliveira Programa de Pós-graduação em Agroquímica. Universidade Federal do Espírito Santo (UFES), Alto Universitário, s/n, Cx. Postal 16, CEP: 29500-000, Alegre, ES, Brazil. Programa de Pós-graduação em Agroecologia. Instituto Federal do Espírito Santo (IFES – Campus de Alegre), Rodovia ES-482, Km 72, CEP: 29500-000, Alegre, ES, Brazil.
  • Fabricia Benda de Oliveira Departamento de Geologia. Programa de Pós-Graduação em Geografia. Universidade Federal do Espírito Santo (UFES), Alto Universitário, s/n, Cx. Postal 16, CEP: 29500-000, Alegre, ES, Brazil.
  • Mauricio Lima Dan Centro de Pesquisa, Desenvolvimento e Inovação Sul. Instituto Capixaba de Pesquisa, Assistência Técnica e Extensão Rural (INCAPER), Rodovia João Domingos Zago, Km 2,5, CEP: 29323-000, Cachoeiro de Itapemirim, ES, Brazil.
  • Diego Lang Burak Departamento de Agronomia. Universidade Federal do Espírito Santo (UFES), Alto Universitário, s/n, Cx. Postal 16, CEP: 29500-000, Alegre, ES, Brazil.
  • Jacyelli Sgranci Angelos Programa de Pós-graduação em Agroquímica. Universidade Federal do Espírito Santo (UFES), Alto Universitário, s/n, Cx. Postal 16, CEP: 29500-000, Alegre, ES, Brazil.
  • Maria Eduarda Marques da Conceição Programa de Pós-graduação em Agroquímica. Universidade Federal do Espírito Santo (UFES), Alto Universitário, s/n, Cx. Postal 16, CEP: 29500-000, Alegre, ES, Brazil.
  • Mateus Zava Zucolotto Programa de Pós-graduação em Agroquímica. Universidade Federal do Espírito Santo (UFES), Alto Universitário, s/n, Cx. Postal 16, CEP: 29500-000, Alegre, ES, Brazil.
  • Angélica Croce de Souza Programa de Pós-graduação em Agroquímica. Universidade Federal do Espírito Santo (UFES), Alto Universitário, s/n, Cx. Postal 16, CEP: 29500-000, Alegre, ES, Brazil.
  • Jamilly de Assis Marques Programa de Pós-graduação em Agroquímica. Universidade Federal do Espírito Santo (UFES), Alto Universitário, s/n, Cx. Postal 16, CEP: 29500-000, Alegre, ES, Brazil. Programa de Pós-graduação em Agroquímica. Universidade Federal do Espírito Santo (UFES), Alto Universitário, s/n, Cx. Postal 16, CEP: 29500-000, Alegre, ES, Brazil.
DOI: https://doi.org/10.4136/ambi-agua.2957

Abstract

Soil chemical analysis is a fundamental to achieve optimal cultivation conditions in a productive silvopastoral system, essential for the planning and management of this activity. The objective of this research is to map the spatial distribution of nutrients in the soil in a 5-year-old silvopastoral system composed of brachiaria-brizantha and jacarandá-da-bahia, and to analyze the effect of tree density and canopy on nutrient levels. The study was conducted at the experimental area of the Capixaba Institute for Research, Technical Assistance, and Rural Extension (INCAPER) in the district of Pacotuba, ES. The delimitation of the work area was done using geographic information systems, to create a regular grid of points to enable systematic soil sampling. A total of 75 disturbed soil samples were collected at depths of 0-0.10 m to obtain quantitative soil nutrient data. High-quality images obtained using a remotely piloted aircraft (RPA) allowed for the overlay of soil nutrient data, pasture data, forest inventory data, and sample plot data to assist in comparative analyses. This enabled identification of the areas with lower canopy development, particularly in the northeast portion. By cross-referencing the spatialized soil nutrient data with the data obtained through RPA, it was possible to correlate them with the lower or higher development of the system. The use of RPA, together with a georeferenced database, proved to be an innovative and powerful tool to support decision-making, allowing for the monitoring of system evolution and serving as a basis for evaluating the relationship between chemical elements and tree canopies. 

Keywords: geostatistics, precision agriculture, soil nutrients.


Published
23/04/2024
Issue
Vol. 19 (2024)
Section
Papers

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