Data/hora: 26/09/2024 04:21:00

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