Data/hora: 03/06/2024 11:17:16

Biblioteca(s): | Embrapa Solos.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 1
Data corrente: | 04/12/2018
Data da última atualização: | 17/04/2019
Autoria: | FRAZÃO, J. J.; BENITES, V. de M.; RIBEIRO, J. V. S.; PIEROBON, V. M.; LAVRES, J.
Afiliação: | JOAQUIM JOSÉ FRAZÃO, USP/CENA; VINICIUS DE MELO BENITES, CNPS; JOÃO VICTOR SCHIAVON RIBEIRO, USP/ESALQ; VITOR MATEUS PIEROBON, USP/ESALQ; JOSÉ LAVRES, USP/CENA.
Título: | Agronomic effectiveness of a granular poultry litter-derived organomineral phosphate fertilizer in tropical soils: soil phosphorus fractionation and plant responses.
Ano de publicação: | 2019
Fonte/Imprenta: | Geoderma, v. 337, p. 582-593, Mar. 2019.
DOI: | 10.1016/j.geoderma.2018.10.003
Idioma: | Inglês
Conteúdo: | Production of organomineral phosphate fertilizers (OMF) from poultry litter (PL) has been suggested to reduce the dependence on phosphorus (P) reserves. Here, we compared a granular PL-derived OMF to triple superphosphate (TSP) in two contrasting tropical soils (Oxisol and Entisol) by using isotope dilution with 32P. Our study aimed to gain insight into soil P fractionation, and P availability to maize plants achieved by P fertilization (0, 25, 50, 75 and 100 mg kg-1 of soil), in order to investigate the agronomic effectiveness of OMF. Despite u-XRF maps revealing that the mixture of PL and TSP as OMF resulted in P hot spots disseminated in a lowconcentration background, whereas for the TSP treatment higher P concentration was uniformly distributed in the granules, there was no difference in maize yield and fertilizer P recovery (%R) between P sources in both soils. In the Oxisol, there was no difference between fertilizers in any of the soil P pools, but larger readily phytoavailable P and smaller moderately labile P fractions were obtained with OMF. In the Entisol, the labile P pool was larger with TSP. Nevertheless, acid and alkaline phosphatase activity and microbial biomass were affected by P rate and P source. The results show that OMF is an effective substitute for conventional phosphate fertilizers, since OMF promotes P recovery, plant P uptake and biomass yields compared to those obtained with TSP.
Palavras-Chave: | Fertilizante de liberação lenta; Fração de fósforo no solo.
Thesagro: | Diluição Isotópica; Oxisol; Zea Mays.
Thesaurus Nal: | Entisols; Oxisols.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
Registro original: | Embrapa Solos (CNPS)
Exemplares: | CNPS - (20028-1) - UPC - AP - DD -  -  - 2018.00317 - DIS