Combining biosolid and mineral sources of phosphorus and potassium in organomineral fertilizers influences the dynamics and efficiency of nutrient release

Netto-Ferreira, Julia Barra; Gabetto, Fernanda Palmeira; Araújo, Ana Carolina Muniz de; Dias, Ricardo de Castro; Sobrinho, Nelson Moura Brasil do Amaral; Zonta, Everaldo

doi:10.1007/s10653-023-01555-2

Cited by 2 publications

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“…Para mitigar a dependência de importações e reduzir impactos ambientais, têm sido buscadas alternativas para o uso mais eficiente de fertilizantes, como o aproveitamento de resíduos orgânicos. Nesse contexto, os fertilizantes organominerais (FOM) têm se destacado como opção promissora, pois combinam adubos minerais e orgânicos para promover liberação gradual e sustentável de nutrientes para as plantas Borges et al, 2019;Barra et al, 2023). Essa abordagem tem demonstrado benefícios agronômicos, como melhor desenvolvimento radicular, elevação da capacidade de troca de cátions (CTC), retenção de água no solo, alteração da comunidade microbiana e redução da acidificação do solo, além de apresentar melhoria da agregação e estrutura do solo Abd Elmageed & Semida, 2015;.…”

Section: Introductionunclassified

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Dinâmica do potássio e resposta do milho à fertilização com fonte organomineral em solo franco-arenoso

Oliveira

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Potassium dynamics and corn response to fertilization with an organomineral source in sandy loam soilBrazil has high external dependence on potassic fertilizers, which leaves the country's agricultural production sensitive to supply and demand shocks for this input. Given this scenario, alternative sources of potassium (K), such as organomineral fertilizers (OMF), have been increasingly used in Brazilian agriculture. However, there are few detailed studies regarding the dynamics of K in the soil and the response of plants to OMFs. The objectives of this study were: (i) to quantify the release of K from a OMF and evaluate its influence on chemical, physical and microbiological attributes of a sandy loam soil, (ii) to evaluate whether the use of OMF influences the communities of soil bacteria and fungi compared to KCl and (iii) compare the effects of rates of a K source OMF based on the critical level (CL) of K for corn (Zea mays) compared to KCl. OMF released K more slowly over time, which can be beneficial to plants as it provides a constant supply of nutrients. K leaching in the OMFfertilized soil was slower in the column experiment than in the KCl-fertilized soil. OMF treatment stimulated greater microbial activity, but reduced the richness and diversity of bacteria and fungi in the soil. For corn plants, the soil fertilized with OMF had equivalent or superior efficacy to KCl, especially in rates suitable for the crop. Furthermore, rates above the CL of K in the soil did not result in yield gains. Therefore, this study highlights the potential of OMF as a viable alternative for Brazilian agriculture, which can contribute to the safety and sustainability of agricultural production.

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Section: Introductionunclassified

“…Ao liberarem lentamente os nutrientes no solo, os FOM podem ajudar a diminuir a lixiviação dos elementos, além de fornecerem matéria orgânica (MO). Solos arenosos dependem fortemente desse aporte orgânico para melhorar sua CTC e a retenção de nutrientes, principalmente K Barra et al, 2023).…”

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Dinâmica do potássio e resposta do milho à fertilização com fonte organomineral em solo franco-arenoso

Oliveira

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Granulated fertilizers are more efficient in reducing potassium leaching losses than combining biosolids with inorganic sources

Netto-Ferreira,

Gabetto,

Araujo

et al. 2024

Revista Brasileira De Ciência Do Solo

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Widespread use of soluble mineral fertilizers derived from non-renewable sources has raised concerns about environmental impacts, energy expenditures, and sustainability. Combining biosolid and mineral sources of phosphorus and potassium to produce organomineral fertilizers (OMF) can be used as an alternative nutrient source while reducing the environmental impact of sewage residues. As this approach simultaneously provides nutrients and incorporates organic matter, we hypothesized the presence of an organic source (biosolid) granulated with mineral sources of potassium (K) and phosphorus (P) would reduce leaching due to the benefits of the organic source and the slower release caused by granulation. Our goal was to evaluate the effect of different OMFs on the leaching losses of nutrients. Two forms of isolated N, P, and K sources (granulated and non-granulated), five OMFs with different NPK proportions (1-2-0, 1-4-0, 1-0-2, 1-2-2, 1-2-4), and a control (unfertilized) were evaluated over ten weeks in a leaching column experiment. Non-granulated potassium sulfate exhibited the highest K leaching and did not differ from OMFs with K in their formulation (granulated PS, 1-0-2, 1-2-2, and 1-4-2). Planned contrasts showed that granulation was particularly effective at reducing K leaching, resulting in a 70 % reduction compared to non-granulated PS. While formulation and granulation showed a trend of potential benefits in reducing N-(NO 3 - + NO 2 - ) leaching, the effect was not statistically significant. Interaction between fertilizer treatments and leaching events was marginally significant for NH 4 + leaching, indicating temporal variations of OMFs in nutrient dynamics may be influenced by mineralization. As granulation modulated how OMFs affected nutrient leaching dynamics, this highlights the importance of the physical characteristics of fertilizers for effective nutrient management.

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Combining biosolid and mineral sources of phosphorus and potassium in organomineral fertilizers influences the dynamics and efficiency of nutrient release

Cited by 2 publications

References 28 publications

Dinâmica do potássio e resposta do milho à fertilização com fonte organomineral em solo franco-arenoso

Dinâmica do potássio e resposta do milho à fertilização com fonte organomineral em solo franco-arenoso

Granulated fertilizers are more efficient in reducing potassium leaching losses than combining biosolids with inorganic sources

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