Biochar and Phosphate Application in a Cadmium-Contaminated Soil: a Strategy to Reduce Cadmium Transference to Rice Plants

Autor(es)

Florentino, Antonio Leite ; Dela Piccolla, Cristiano ; Lisboa, Izaias Pinheiro ; Lupp, Renata Mota ; Muraoka, Takashi ; Pavinato, Paulo Sergio

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION; v. 24, n. 3, p. 13-pg., 2024-06-27.

Resumo

Biochar is a soil conditioner that has the potential to remediate soil contaminated with cadmium (Cd). However, the effectiveness of biochar in soil remediation depends on a series of physical, chemical, and biological conditions. Similar to the effect of biochar, phosphate may also promote Cd immobilization in soil, and the vital role of phosphorus (P) in supporting plant growth and yield is well known. In this context, we aimed to evaluate rice (Oryza sativa L.) growth and the P and Cd contents in plant tissues under the combined application of biochar and phosphate as a strategy to mitigate the adverse effects of Cd on rice grown in contaminated soil. A pot experiment was carried out in a greenhouse in a completely randomized design, in a 2 x 2 x 2 factorial scheme, where P and Cd were applied in combination and individually to the soil with and without biochar of Eucalyptus. The combined application of biochar and P reduced Cd content in rice shoots. Higher pH was observed in soils treated with biochar, which might explain, together with the adsorptive capacity, the lower extraction of Cd in soils treated with biochar. However, an increase in P content in the tissue, number of tillers, and biomass production in rice was recorded only under P application. Our findings suggest that biochar and P combined application in Cd-contaminated soils can mitigate the adverse effects of Cd in rice tissues. (AU)

• Processo FAPESP: 22/01698-0 - Dinâmica e ciclagem de boro, cobre e zinco em ecossistema florestal integrada ao manejo de resíduos e às transformações de carbono: consequências para a sustentabilidade da produtividade florestal
• Beneficiário: Antonio Leite Florentino
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 23/12181-1 - Indicadores de saúde do solo integrados ao manejo de resíduos florestais em plantações de eucalipto
• Beneficiário: Antonio Leite Florentino
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 20/11865-6 - Desenvolvendo um fertilizante nitrogenado de eficiência aumentada
• Beneficiário: Izaias Pinheiro Lisboa
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado