Short-term effects of filter cake and biochar on the physical-hydric properties of an oxisol

Marcelo Ferri; João Carlos  Arruda-Oliveira; Jholian Maicon Ribeiro-Santos; Emerson Silva Miranda; Rômulo Caique Gonçalves Feletti; Wininton Mendes da Silva; Oscarlina Lúcia dos Santos Weber; Eduardo Guimarães Couto

doi:10.1590/1983-21252025v3812810rc

Authors

Marcelo Ferri Instituto de Terras de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0002-8722-4554
João Carlos Arruda-Oliveira Graduate Program in Tropical Agriculture, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0001-5833-2823
Jholian Maicon Ribeiro-Santos Graduate Program in Tropical Agriculture, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0003-2081-0353
Emerson Silva Miranda Graduate Program in Tropical Agriculture, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0009-0009-0029-3505
Rômulo Caique Gonçalves Feletti Graduate Program in Tropical Agriculture, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0003-4401-8889
Wininton Mendes da Silva Empresa Mato-grossense de Pesquisa, Assistência e Extensão Rural, Cuiabá, MT, Brazil https://orcid.org/0000-0002-7945-2127
Oscarlina Lúcia dos Santos Weber Graduate Program in Tropical Agriculture, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0002-0625-4904
Eduardo Guimarães Couto Graduate Program in Tropical Agriculture, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0002-5271-9709

DOI:

https://doi.org/10.1590/1983-21252025v3812810rc

Keywords:

Coarse-textured soil. Slow pyrolysis. Soil water retention. Sugarcane residue.

Abstract

The residues and by-products from sugarcane processing can modify the primary soil structure and promote sustainable cultivation. Understanding the residue-soil interaction in water availability in tropical soils is essential for various economically important crops. Thus, this study aimed to evaluate the effects of filter cake and biochar application on the physical-hydraulic parameters of Oxisol in the short term. A field experiment was conducted on a commercial farm using six strip-plot treatments with four replications: Control; Bc100 (10 Mg ha^-1 of biochar); Bc50 (5 Mg ha^-1 of biochar); Fc100 (40 Mg ha^-1 of filter cake); Fc50 (20 Mg ha^-1 of filter cake); and Fc100+Bc100. After one year, soil samples (0-0.1 m layer) were collected and analyzed for bulk density, total porosity, macroporosity, microporosity, and the area under the soil water retention curve (AUWRC). Filter cake and biochar application did not influence soil density in the short term. However, applying 40 Mg ha^-1 of filter cake increased total porosity and soil water retention. Additionally, combining 40 Mg ha^-1 of filter cake with 10 Mg ha^-1 of biochar further enhanced water retention, whereas biochar alone showed no significant effect. The results indicate that filter cake, either alone or in combination with biochar, improves the physical-hydraulic properties of medium-textured soil after one year of application.

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