Influence of sewage sludge biochar and Priestia sp. on soil fertility

Authors

  • José Nathanael Ferreira de Andrade Academic Unit of Agricultural Engineering, Center for Technology and Natural Resources, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil https://orcid.org/0000-0002-2439-4142
  • Josely Dantas Fernandes Academic Unit of Agricultural Engineering, Center for Technology and Natural Resources, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil https://orcid.org/0000-0002-1297-6962
  • Lúcia Helena Garófalo Chaves Academic Unit of Agricultural Engineering, Center for Technology and Natural Resources, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil https://orcid.org/0000-0002-9905-2315
  • Laysa Gabryella de Souza Laurentino Academic Unit of Agricultural Engineering, Center for Technology and Natural Resources, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil https://orcid.org/0000-0002-7852-0052
  • Sinthya Kelly Queiroz Morais Academic Unit of Agricultural Engineering, Center for Technology and Natural Resources, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil https://orcid.org/0000-0001-5397-2952
  • Gustavo Tomio Magalhães Kubo Academic Unit of Agricultural Engineering, Center for Technology and Natural Resources, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil https://orcid.org/0000-0003-2101-9600
  • Weslley Bruno Belo de Sousa Academic Unit of Agricultural Engineering, Center for Technology and Natural Resources, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil https://orcid.org/0000-0002-9119-2575
  • Andre Alisson Rodrigues da Silva Academic Unit of Agronomy, Universidade Federal do Oeste do Pará, Juruti, PA, Brazil https://orcid.org/0000-0001-9453-1192

DOI:

https://doi.org/10.1590/1983-21252025v3812600rc

Keywords:

Microorganism. Pyrolysis. Soil properties.

Abstract

This study aimed to evaluate, after the period of soil incubation with biochar, the influence of the interaction between sewage sludge biochar and Priestia sp. on soil fertility. The experiment was carried out in Campina Grande, PB, Brazil, using 4 doses of biochar (0, 5, 10 and 15 t ha-1) and 4 doses of Priestia sp. (0, 1.5 × 106, 1.5 × 107, 1.5 × 108 CFU mL-1), in a completely randomized design with 3 replicates, totaling 48 experimental units, containing 350 grams of soil. After 104 days of soil incubation with the treatments mentioned above, biochar x Priestia sp. (after mineralization), soil samples were collected from the experimental units and chemically analyzed. Biochar significantly influenced all chemical variables evaluated. Priestia sp. affected most variables, except for electrical conductivity, sodium and calcium. The interaction between biochar and Priestia sp. influenced phosphorus, pH, magnesium and hydrogen + aluminum contents. In general, the single effects of biochar and Priestia sp. promoted increases in carbon and calcium contents in the soil. The interaction between the factors favored the increase in available phosphorus and variations in pH, keeping it within a range suitable for nutrient availability, evidencing the potential of the combination for improving soil fertility.

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Published

19-09-2025

Issue

Vol. 38 (2025)

Section

Scientific Article

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