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Agronomic effectiveness of a granular poultry litter-derived organomineral phosphate fertilizer in tropical soils: Soil phosphorus fractionation and plant responses

Texto completo
Autor(es):
Frazao, Joaquim Jose [1] ; Benites, Vinicius de Melo [2] ; Schiavon Ribeiro, Joao Victor [3] ; Pierobon, Vitor Mateus [3] ; Lavres, Jose [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Ctr Nucl Energy Agr, Lab Plant Nutr, Ave Centenario 303, BR-13400970 Piracicaba, SP - Brazil
[2] EMBRAPA Soils, Rua Jardim Bot 1024, BR-22460000 Rio De Janeiro, RJ - Brazil
[3] Univ Sao Paulo, Luiz de Queiroz Coll AgricHlt, Ave Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Geoderma; v. 337, p. 582-593, MAR 1 2019.
Citações Web of Science: 0
Resumo

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 P-32. 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 mu-XRF maps revealing that the mixture of PL and TSP as OMF resulted in P hot spots disseminated in a low concentration 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. (AU)

Processo FAPESP: 15/19121-8 - EMU concedido no processo 2015/05942-0: sistema de microfluorescência de Raios X
Beneficiário:Hudson Wallace Pereira de Carvalho
Linha de fomento: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
Processo FAPESP: 13/22173-4 - Métodos isotópicos (32P), bioquímicos e fisiológicos na avaliação agronômica de fertilizantes organominerais granulados pelas culturas do milho e da soja
Beneficiário:Joaquim José Frazão
Linha de fomento: Bolsas no Brasil - Doutorado