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- W2956585997 abstract "O fosforo (P) e considerado um nutriente imovel no solo, pois o P liga-se fortemente ao Fe e Al. No entanto, foi observado em solos arenosos que o Fe e Al, mesmo em pequenas quantidades, influenciam a lixiviacao de P. Objetivou-se avaliar a perda de P em amostras de um Neossolo Regolitico adubado e nao adubado com esterco bovino curtido, e relacionar as perdas de P com as formas de Fe e Al. Foram coletadas quatro amostras de solo adubado e nao adubado com esterco bovino curtido na profundidade de 0 - 10 cm no municipio de Esperanca – PB. Apos a coleta foram feitas analises de fertilidade do solo, incluindo P em Mehlich – 1 e P em agua, Fe e Al extraido com Oxalato de amonio e Ditionito – citrato e bicarbonato. O ensaio de lixiviacao foi realizado atraves do metodo de deslocamento miscivel utilizando colunas acrilicas preenchidas com solo e uma solucao salina de KCl e CaCl2 a 0,001M para a lixiviacao. A area A2 teve o maior teor de Pw (14,45 mg kg -1) e Pext (54,50 mg kg -1), esta mesma area apresentou a maior perda de Plix (128,83 mg L-1). A correlacao entre Plix e as formas de Fe e Al foram nao significativas. O Plix teve maior correlacao com as formas mais cristalinas de Fe e Al. A maior perda de P foi observada ate 20 NVp.Palavras – chave: Deslocamento miscivel de P; Sorcao e Lixiviacao de P PHOSPHORUS LOSSES BY LEACHING IN NEOSSOLO REGOLITICO FERTILIZED WITH CURED CATTLE DUNG IN SEMI-ARID CONDITIONS ABSTRACT: Phosphorus (P) is considered an immobile nutrient in the soil, since P is strongly bound to Fe and Al. It was observed in sandy soils that Fe and Al, even in small amounts, influence the leaching of P. The objective was to evaluate P loss in samples of a Regolithic Neossol fertilized and not fertilized with tanned manure, and to relate P losses with the Fe and Al forms. Four samples of soil fertilized and not fertilized with tanned manure at depth of 0 - 10 cm in the municipality of Esperanca - PB. After collection, soil fertility analyzes were performed, including P in Mehlich - 1 and P in water, Fe and Al extracted with ammonium oxalate and Dithionite - citrate and bicarbonate. The leaching assay was performed by the miscible displacement method using soil-filled acrylic columns and a 0.001M KCl and CaCl2 saline solution for the leaching. The area A2 had the highest content of Pw (14.45 mg kg -1) and Pext (54.50 mg kg -1), this same area presented the highest loss of Plix (128.83 mg L-1). The correlation between Plix and the Fe and Al forms were not significant. Plix had a higher correlation with the more crystalline forms of Fe and Al. The greatest loss of P was observed up to 20 NVp.Keywords: Miscible displacement of P; P Sorption and Leaching." @default.
- W2956585997 created "2019-07-23" @default.
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- W2956585997 date "2018-07-06" @default.
- W2956585997 modified "2023-10-16" @default.
- W2956585997 title "PERDAS DE FÓSFORO POR LIXIVIAÇÃO EM NEOSSOLO REGOLÍTICO ADUBADO COM ESTERCO BOVINO CURTIDO EM CONDIÇOES SEMIARIDAS" @default.
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