Data/hora: 03/06/2024 03:45:06

Provedor de dados: 	90	
País: 	Brazil	
Título: 	Acid Ammonium Citrate as P Extractor for Fertilizers of Varying Solubility	
Autores: 	Santos,Wedisson Oliveira; Mattiello,Edson Marcio; Barreto,Matheus Sampaio Carneiro; Cantarutti,Reinaldo Bertola.	
Data: 	2019-01-01	
Ano: 	2019	
Palavras-chave: 	Phosphorus fertilizers; Citric acid; Ammonium neutral citrate.	
Resumo: 	ABSTRACT: There are several globally accepted methods to chemically characterize P-fertilizers, but not all are suitable to predict the agronomic efficiency of the P sources in terms of plant nutrition. Our aim was to investigate the performance of P extractors for fertilizers, investigating the consistency of different methods for P sources of varying properties and the related plant responses. The experiment was carried out in a greenhouse, using corn as a model plant. Phosphorus values extractable in water, 2 % citric acid, 2 % formic acid, ammonium neutral citrate + water, and acid ammonium citrate were evaluated for eight P fertilizers of varied solubility and correlated with P uptake by corn. The extractors citric acid and formic acid recovered no predictive amounts of P from crystalline apatite sources (Araxá and Patos phosphate rocks, PRs). However, they showed a satisfactory performance for Bayóvar PR and partially acidulated PRs but extracted low amounts of P from soluble P sources such as superphosphates. Neutral ammonium citrate + water extractors could accurately predict the efficiency of soluble P sources but underestimated the performance of Bayóvar (a reactive PR). In contrast, the extractor acid ammonium citrate, AAC, (pH 3) accurately predicted the agronomic efficiency of all P fertilizers. We therefore suggest AAC as an effective predictor of the agronomic effectiveness of any inorganic phosphorus sources.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100503	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/18069657rbcs20180072	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.43 2019	
Fonte: 	info:eu-repo/semantics/openAccess