Long-term effect of biochar-based fertilizers application in tropical soil: Agronomic efficiency and phosphorus availability.

Autor: Carneiro JSDS; Federal University of Lavras, Soil Science Department, Lavras 37200-900, Minas Gerais, Brazil., Ribeiro ICA; Federal University of Lavras, Soil Science Department, Lavras 37200-900, Minas Gerais, Brazil., Nardis BO; Federal University of Lavras, Soil Science Department, Lavras 37200-900, Minas Gerais, Brazil., Barbosa CF; Federal University of Lavras, Soil Science Department, Lavras 37200-900, Minas Gerais, Brazil., Lustosa Filho JF; Federal University of Viçosa, Department of Soils, Viçosa 36570-900, Minas Gerais, Brazil., Melo LCA; Federal University of Lavras, Soil Science Department, Lavras 37200-900, Minas Gerais, Brazil. Electronic address: leonidas.melo@ufla.br.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2021 Mar 15; Vol. 760, pp. 143955. Date of Electronic Publication: 2020 Dec 09.
DOI: 10.1016/j.scitotenv.2020.143955
Abstrakt: Incorporation of phosphorus (P) into an organic matrix may be an effective strategy to increase plant P use efficiency in high P-fixing soils. The objective of this work was to evaluate the effect of biochar-based fertilizers (BBFs), produced from poultry litter (PLB) and coffee husk (CHB) enriched with phosphoric acid and magnesium oxide, in combination with triple superphosphate (TSP) on plant growth and soil P transformations. Treatments were prepared as: TSP, CHB, PLB, CHB + TSP [1:1], CHB + TSP [3:1], PLB + TSP [1:1] and PLB + TSP [3:1]; with numbers in brackets representing the proportion of BBF and TSP on a weight basis. Cultivations were: Mombasa grass, maize, and common bean interspersed with fallow periods. After cultivations, a sequential extraction procedure was employed to determine P distribution among different P pools. A kinetic study was performed and revealed that TSP released approximately 90% of total P, and BBFs less than 10% in the first hour. BBF alone or in combination with TSP presented higher or similar biomass yields, relative agronomic effectiveness, and P uptake when compared with TSP. As for the soil, BBFs increased non-labile P fractions, which can be due to pyrophosphate formed during pyrolysis. According to these results, BBFs could totally or partially replace conventional soluble P fertilizers without compromising crop yield either in the short and long-term.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2020 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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