Data/hora: 05/06/2024 02:24:26

Biblioteca(s): | Embrapa Café.
Data corrente: | 11/03/2011
Data da última atualização: | 11/03/2011
Autoria: | ALVARENGA GARCIA, A. L.; GARCIA, A. W. R.; PADILHA, L.
Afiliação: | FUNDAÇÃO PROCAFÉ; FUNDAÇÃO PROCAFÉ; LILIAN PADILHA, SAPC.
Título: | Application of urea with urease inhibitor in young coffee plants.
Ano de publicação: | 2008
Fonte/Imprenta: | In: INTERNATIONAL CONFERENCE ON COFFEE SCIENCE, 22. 2008, Campinas, São Paulo, Brazil.
Idioma: | Inglês
Conteúdo: | The nitrogen is the most required nutrient by the coffee culture and its application is usually done in the form of urea. Although easy to handle, significant losses of N to atmosphere may occurs due to the transformation of urea in ammonium, as a consequence of urease action, an enzyme produced by soil microorganisms. This work aimed to evaluate NBPT efficiency, an urease inhibitor, in the reduction of N losses by volatilization. The work was carried out in a greenhouse using a factorial design comprised of three N doses in the form of urea, in the presence and absence of NBPT, applied in two times, and with two ways of irrigation: before and after fertilizer application. Three independent treatments were added: a control without N, and 7.2g of N in just one application with and without NBPT. Dry weight and mobilized N were evaluated four months after the treatments. It was found that the addition of NBPT to urea significantly increased dry weight and mobilized N per plant, and that the response was proportional to the N applied. No response was observed to the time of irrigation. In the treatments where N was applied in just one dose, plant death was observed in two days in absence of NBPT, or in six days, when NBPT was used, corroborating the idea that NBPT can delay N volatilization.
Palavras-Chave: | Coffee plant.
Thesaurus Nal: | Urea.
Categoria do assunto: | --
Registro original: | Embrapa Café (CNPCa)
Exemplares: | CNPCa - (164-1) - UPC - AA - DD -  -  -  - DIS