Retenção de água em solos arenosos de diferentes materiais de origem com adição de biocarvão

Gilmar Nunes Torres; Ricardo Santos Silva Amorim; Luis Augusto Di Loreto Di Raimo; Ohana Cristina Oliveira Faria; Eduardo Guimarães Couto

doi:10.1590/1983-21252024v3711792rc

Authors

Gilmar Nunes Torres Postgraduate Program in Tropical Agriculture, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0003-4307-415X
Ricardo Santos Silva Amorim Department of Agricultural Engineering, Universidade Federal de Viçosa, Viçosa, MG, Brazil https://orcid.org/0000-0002-4570-1770
Luis Augusto Di Loreto Di Raimo Postgraduate Program in Tropical Agriculture, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0003-0681-7647
Ohana Cristina Oliveira Faria Postgraduate Program in Tropical Agriculture, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0002-3407-6869
Eduardo Guimarães Couto Department of Soil and Agricultural Engineering, Universidade Federal de Mato Grosso, Cuiabá, MT, Brazil https://orcid.org/0000-0002-5271-9709

DOI:

https://doi.org/10.1590/1983-21252024v3711792rc

Keywords:

Neossolo Quartzarênico. Geological Formations. Fine Sand.

Abstract

This study evaluated biochar influence on water retention in sandy soils with different source materials. Samples from Horizon A of six profiles of Neossolos Quartzarênicos (Salto das Nuvens, Utiariti, Pantanal, Coberturas Detrito Lateríticas Ferruginosas, Botucatu e Bauru formations), collected in different regions of the state of Mato Grosso, Brazil, were used to determine the hydro-physical characteristics with the addition of biochar. The biochars assessed were produced from two sources of raw material (sugarcane filter cake and cotton husks) under pyrolysis at a temperature of 400 °C. Retention curves for soils with and without biochar, the field capacity, permanent wilting point, available water in the soil, total porosity, macroporosity, and microporosity were determined. The results evidenced that the application of biochar increases the microporosity (86.7% with cotton husks biochar and 67.9% with filter cake biochar) and reduces the microporosity of sandy soils (38.2% with cotton husks biochar and 36.0% with filter cake biochar); also, there was a higher increase in water availability with biochar from cotton husks (57.1%). There was an increase in soil microporosity and a reduction in macroporosity due to the influence of biochar addition in the sandy soils from the Salto das Nuvens, Utiariti, Pantanal e Coberturas Detrito Lateríticas ferruginosas, with no changes in the Botucatu and Bauru Formations. Biochar increases water retention in sandy soils; however, this does not occur for all geological formations studied.

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