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Provedor de dados:  Rev. Bras. Ciênc. Solo
País:  Brazil
Título:  New methods to quantify NH3 volatilization from fertilized surface soil with urea
Autores:  Alves,Ana Carolina
Oliveira,Patrícia Perondi Anchão
Herling,Valdo Rodrigues
Trivelin,Paulo Cesar Ocheuze
Luz,Pedro Henrique de Cerqueira
Alves,Teresa Cristina
Rochetti,Ramon Cellin
Barioni Júnior,Waldomiro
Data:  2011-02-01
Ano:  2011
Palavras-chave:  Fertilizer-N
Ammonia absorber
NH3-N loss
Resumo:  Gaseous N losses from soil are considerable, resulting mostly from ammonia volatilization linked to agricultural activities such as pasture fertilization. The use of simple and accessible measurement methods of such losses is fundamental in the evaluation of the N cycle in agricultural systems. The purpose of this study was to evaluate quantification methods of NH3 volatilization from fertilized surface soil with urea, with minimal influence on the volatilization processes. The greenhouse experiment was arranged in a completely randomized design with 13 treatments and five replications, with the following treatments: (1) Polyurethane foam (density 20 kg m-3) with phosphoric acid solution absorber (foam absorber), installed 1, 5, 10 and 20 cm above the soil surface; (2) Paper filter with sulfuric acid solution absorber (paper absorber, 1, 5, 10 and 20 cm above the soil surface); (3) Sulfuric acid solution absorber (1, 5 and 10 cm above the soil surface); (4) Semi-open static collector; (5) 15N balance (control). The foam absorber placed 1 cm above the soil surface estimated the real daily rate of loss and accumulated loss of NH3N and proved efficient in capturing NH3 volatized from urea-treated soil. The estimates based on acid absorbers 1, 5 and 10 cm above the soil surface and paper absorbers 1 and 5 cm above the soil surface were only realistic for accumulated N-NH3 losses. Foam absorbers can be indicated to quantify accumulated and daily rates of NH3 volatilization losses similarly to an open static chamber, making calibration equations or correction factors unnecessary.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Sociedade Brasileira de Ciência do Solo
Relação:  10.1590/S0100-06832011000100012
Formato:  text/html
Fonte:  Revista Brasileira de Ciência do Solo v.35 n.1 2011
Direitos:  info:eu-repo/semantics/openAccess

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