New methods to quantify NH3 volatilization from fertilized surface soil with urea
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Data
2011-01-01
Autores
Aves, Ana Carolina
Anchao Oliveira, Patricia Perondi
Herling, Valdo Rodrigues
Ocheuze Trivelin, Paulo Cesar
de Cerqueira Luz, Pedro Henrique
Alves, Teresa Cristina
Rochetti, Ramon Cellin [UNESP]
Barioni Junior, Waldomiro
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Ciência do Solo
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) N-15 balance (control). The foam absorber placed 1 cm above the soil surface estimated the real daily rate of loss and accumulated loss of NH3-N and proved efficient in capturing NH3 volatized from urea-treated soil. The
Descrição
Palavras-chave
fertilizer-N, ammonia absorber, N-15, NH3-N loss
Como citar
Revista Brasileira de Ciência do Solo. Vicosa: Soc Brasileira de Ciência do Solo, v. 35, n. 1, p. 133-140, 2011.