Data/hora: 12/06/2024 02:37:40

Biblioteca(s): | Embrapa Amazônia Oriental.
Data corrente: | 27/10/2020
Data da última atualização: | 17/11/2020
Autoria: | BRASIL, E. C.; DANTAS, R. C. R.; SILVA JÚNIOR, M. L. da; GAMA, M. A. P.
Afiliação: | EDILSON CARVALHO BRASIL, CPATU; RUBIA CARLA RIBEIRO DANTAS, UFRA; MÁRIO LOPES DA SILVA JÚNIOR, UFRA; MARCOS ANDRÉ PIEDADE GAMA, UFRA.
Título: | Phosphorus fraction in a yellow latosol cropped under no-tilage system in the brazilian Amazon.
Ano de publicação: | 2020
Fonte/Imprenta: | Journal of Agricultural Studies, v. 8, n. 3, p. 484-504, 2020.
DOI: | https://doi.org/10.5296/jas.v8i3.16668
Idioma: | Inglês
Conteúdo: | Phosphorus (P) deficiency is one of the main factors that limits productivity in Brazilian soils. However, soil management under no-tillage system (NT) may alter the availability of P in the soil. The objective of this study was to evaluate the dynamics ofP fractions in a dystrophic Yellow Latosol, cropped under no-tillage for a long period of time in the Amazon Biome. The study was conducted on a farm located in the municipality of Paragominas, southeastern Pará. This experiment evaluated plots cultivatedin plots at nine (NT9), 11 (NT11) and 13 (NT13) years of no-tillage system adoption, in one plot under conventional cultivation system (CS) and a surrounding area under native forest (NF) at depths of 0-10, 10-20, 20-30 and 30-40 cm. The soil samples weresubjected to P chemical fractionation to determine the different ractions. The soil management systems showed differential capacity of P accumulation. In the areas under no-tillage, P is accumulated in the toplayer and drastically reduced with depth, while in CS, this reduction is less pronounced. In the 0-20 cm depth layer during the adopted period of the no-tillage system, it was observed an increase in the content of inorganic phosphorus extracted by resin and 0.5 M NaHCO3(PiAERand PiBIC) and organicphosphorus extracted by 0.5 M NaHCO3(PoBIC), fractions considered as available for Biomass. Regardless of the year of adoption, the no-tillage system was superior to CS and NF. This was also observed for the inorganic and organic fractions extracted by NaOH 0.1M(PiHid-0.1and PoHid-0.1)and inorganic fraction extracted by HCl 1M (PiHCl).
Palavras-Chave: | Yellow Latosol.
Thesagro: | Fósforo; Latossolo Amarelo; Plantio Direto; Profundidade.
Thesaurus Nal: | No-tillage; Phosphorus; Soil depth.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/217109/1/Phosphorus-Fraction-in-a-Yellow-Latosol-Cropped-Under-No-tilage-System-in-the-Brazilian-Amazon.pdf
Registro original: | Embrapa Amazônia Oriental (CPATU)
Exemplares: | CPATU - (56585-1) - UPC - AP - DD -  -  -  - DIS