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| Barth,Gabriel; Otto,Rafael; Almeida,Risely Ferraz; Cardoso,Elke Jurandy Bran Nogueira; Cantarella,Heitor; Vitti,Godofredo Cesar. |
| ABSTRACT The use of nitrification inhibitors (NIs; dicyandiamide - DCD) is an alternative to reduce oxidation of ammonium (NH4+-N) to nitrate (NO3–-N) in the soil, reducing NO3–-N losses from fertilization practices. Based on the hypothesis that DCD reduces conversion of NH4+-N to NO3–-N in tropical soils and inhibits ammonia oxidizing microorganisms (AOM) abundance, soils from the Piracicaba region, São Paulo, with different textures (sand, loam and clay) were incubated with ammonium sulphate (AS) and DCD. Contents of NH4+-N, NO3–-N, soil pH, and AOM abundance were quantified periodically. Ammonium sulphate increased AOM abundance in all soils, but AS+DCD presented AOM abundances similar to the control. During 90 days of incubation, the effectiveness of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: DCD; Nitrogen losses; Ammonium sulphate; Fertilizer. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000401404 |
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| Gonzatto,Rogério; Stüker,Fernanda; Aita,Celso; Giacomini,Sandro José; Lüdtke,Roberto Carlos; Dessbesell,Alexandre; Giacomini,Diego Antonio; Pujol,Stefen Barbosa. |
| ABSTRACT: Inhibition of nitrification of ammoniacal nitrogen pig slurry after its application to the soil can mitigate nitrogen (N) losses by nitrate (NO3 -) denitrification and leaching, with economical and environmental benefits. However, the use of this strategy is incipient in Brazil and, therefore, requires further assessment. The aim of this study was to evaluate the efficiency of dicyandiamide (DCD) nitrification inhibitor in slowing the nitrification of ammoniacal N applied to the soil with pig slurry (PS). For this, incubation was performed in laboratory, where nitrification was assessed by NO3 - accumulation in the soil. Rates of 2.8, 5.7 and 11.3kg DCD ha-1 were compared, being applied to the soil during PS addition. Nitrification was inhibited... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogen oxidation; DCD; Nitrogen dynamics. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000500802 |
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| Aita,Celso; Tonetto,Felipe; Gonzatto,Rogerio; Pujol,Stefen Barbosa; Schirmann,Janquieli; Depoi,Juliano dos Santos; Mezzalira,Ana Paula; Hochscheid,Matheus; Zirbes,Emerson; Giacomini,Sandro José. |
| ABSTRACT: The impact on nitrous oxide (N2O) emissions caused by combining dairy slurry (DS) and urea to supply crops with nitrogen (N) is still not well characterized. The main objective of this study was to compare the differences between N2O emissions in the cases of exclusive use of urea and the combined use of DS and urea as N sources to no-tillage wheat and corn. We also compared N2O emissions between two DS application methods (surface-broadcast vs. injection), as well as the addition of dicyandiamide (DCD) to DS. The experiment was conducted under no-tillage and six treatments were applied at sowing as follows: no fertilization (control), surface-broadcast urea (urea-N), surface-broadcast DS (DSs), surface-broadcast DS with DCD (DSs + DCD),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dicyandiamide; DCD; Slurry injection in soil; No-tillage. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100517 |
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| Aita,Celso; Balem,Andressa; Pujol,Stefen Barbosa; Schirmann,Janquieli; Gonzatto,Rogério; Giacomini,Diego Antonio; Vargas,Patrícia Victória; Giacomini,Sandro José. |
| A rápida nitrificação do nitrogênio (N) amoniacal de fontes orgânicas e minerais no solo pode resultar em perdas de nitrato (NO3-) para o ambiente. Uma estratégia para a redução dessas perdas envolve o uso de inibidores de nitrificação. O objetivo do presente trabalho foi o de avaliar, em condições de laboratório, a eficiência da dicianodiamida (DCD), presente no produto Agrotain® Plus (AP), em inibir a nitrificação do N amoniacal de cama de aviário (CA) no solo. Foram avaliados cinco tratamentos, sendo um com CA incorporada ao solo, três com CA incorporada ao solo com AP, nas doses de 3,5, 7,0 e 14,0kg ha-1, além de um tratamento somente com solo. A nitrificação foi monitorada através da determinação periódica dos teores de NH4+ e NO3 no solo durante 69... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dinâmica do N; Lixiviação de NO3-; Desnitrificação; DCD. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000800008 |
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