Estimating nitrogen mineralizalion in a "cerrado" dark-red latosol by laboratory incubalion, and lhe effect of soil sample disturbance.

• Autor(a) principal: Klausner, Stuart D.
• Data de Publicação: 2014
• Outros Autores: Suhet, Allert Rosa, Duxbury, John M.
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Brasileira (Online)
• Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/13473
• topic: savanna; nitrogen analysis in soil.; savana; análise de nitrogênio no solo

Four dark-red latosols (Haplustox) were sampled at or near the "Centro de Pesquisa Agropecuária dos Cerrados - CPAC" - (Cerrados Agricultural Research Center), in Planaltina, DF, Brazil. A laboratory soil incubation study, at 35 ºC and 0.25 bar water tension, was conducted to evaluate the effect of soil disturbance on N mineralization and to determine the suitability of an incubation procedure for estimating N mineralization in the field. Mineralization rates ranged from 1.2 to 8.8kg N ha-1 wk-1 over a twelve-week period. The data suggested that as long as there is some degree of soil aggregation, soil disturbance had no effect on N mineralization. The amount of N mineralized during the incubation period in the laboratory showed a low correlation with the N mineralization in the field.