Data/hora: 10/06/2024 00:12:37

Biblioteca(s): | Embrapa Cerrados.
Data corrente: | 25/02/2021
Data da última atualização: | 25/02/2021
Autoria: | OLIVEIRA, L. E. Z.; SOUSA, D. M. G. de; FIGUEIREDO, C. C.; NUNES, R. de S.; MALAQUIAS, J. V.
Afiliação: | DJALMA MARTINHAO GOMES DE SOUSA, CPAC; RAFAEL DE SOUZA NUNES, CPAC; JUACI VITORIA MALAQUIAS, CPAC.
Título: | Long-term phosphate fertilization strategies evaluation in a Brazilian Oxisol.
Ano de publicação: | 2020
Fonte/Imprenta: | Agronomy Journal, v. 112, n. 5, p. 4303-4320, 2020.
Páginas: | p. 4303-4320
Idioma: | Inglês
Conteúdo: | There are concerns related to the application of phosphate fertilizers to weathered soils that present low soil test phosphorus (STP) due to P adsorption in iron oxyhydroxides. Furthermore, long-term trials are needed to evaluate crop response to corrective P fertilization and its interaction with different maintenance P fertilization strategies in these soils. An experiment involving the combination of three initial corrective P fertilization schemes (control without P correction or with the application of 105 kg P ha&#8722;1 as triple superphosphate [TSP] or reactive rock phosphate [RRP]), four Pmaintenance strategies (a controlwithout the application of maintenance P, or 35 kg P ha&#8722;1 yr&#8722;1 as TSP, RRP, or a mix of both) and two application methods was cultivated during 16 yr at the Embrapa Cerrados experimental station in Planaltina, DF, Brazil. Corrective P fertilization promoted an early crop yield response. In contrast, high crop yields were only obtained in control treatments with no corrective P fertilization after soil P stocks were increased to a minimum level. With increasing P stocks, broadcast application resulted in slightly better yields. The required residual P stocks in soil to obtain high yields were estimated as equivalent to 113.6 and 205.2 kg P ha&#8722;1 for TSP and RRP, respectively. These values allow for STP contents to increase to critical levels, whose value for TSP of 4.1 mg kg&#8722;1 Mehlich-1 P is below that recommended for the region, possibly due to the contribution of organic P forms in the long-term no-tillage system
Thesagro: | Fertilizante Fosfatado; Rendimento; Solo; Tratamento do Solo.
Categoria do assunto: | --
Registro original: | Embrapa Cerrados (CPAC)
Exemplares: | CPAC - (36901-1) - UPC - AP - DD - DIGITAL -  - DIGITAL - DIS