Data/hora: 22/09/2024 05:17:44

Biblioteca(s): 	Embrapa Pesca e Aquicultura.	
Data corrente: 	17/11/2016	
Data da última atualização: 	30/10/2019	
Autoria: 	KROTH, P. L.; BORTOLON, L.; SCHLINDWEIN, J. A.; BORTOLON, E. S. O.	
Afiliação: 	PLINIO L. KROTH, UFRGS; LEANDRO BORTOLON, CNPASA; JAIRO A. SCHLINDWEIN, UNIVERSIDADE FEDERAL DE RONDÔNIA; ELISANDRA SOLANGE OLIVEIRA BORTOLON, CNPASA.	
Título: 	Ion exchange resin membrane sensitivity analysis of selected parameters for soil nutrient extraction.	
Ano de publicação: 	2016	
Fonte/Imprenta: 	Journal of Agricultural Science, Toronto, v. 8, n. 10, p. 189-203, 2016.	
ISSN: 	1916-9760	
DOI: 	10.5539/jas.v8n10p189	
Idioma: 	Inglês	
Conteúdo: 	The ion exchange resin method has received considerable attention as an alternative soil test method to evaluate plant available nutrients. This study sought to investigate the effect of changes to the resin standard method in the capacity of the resin to extract soil P, K, Ca, and Mg in soils with different texture. We tested the following modifications: soil grinding levels (< 2 mm; < 0.3 mm), shaking time (8 h; 16 h; 24 h), reciprocation level (12.5 rpm; 25 rpm; 50 rpm), solution and elution saturation concentration (0.25/0.25 mol L-1; 0.5/0.5 mol L-1; 1.0/1.0 mol L-1), soil:solution ratio (1:5 v:v; 1:10 v:v; 1:16 v:v; 1:25 v:v), room temperature (10 oC, 15 oC, 25 oC, 40 oC), and resin amount (1 n; 2 n). When one factor was changed all the others were kept the same as the standard procedure. We selected the five most representative soil orders used for crop production in Southern Brazil which have a wide range of clay, organic matter, Mehlich-1 extractable P and K, and KCl exchangeable Ca, and Mg contents. Results showed that modifications on the standard extraction procedure affected the amounts of soil P, K, Ca, and Mg extracted. Temperature was the main factor affecting the amount of P extracted from the soil with ion exchange membrane resin. Our results can be useful to other regions that might be interested in adopting the resin soil test method, allowing others to identify the impacts of similar method modifications on soil nutrient availability according to soil type, soil management, and temperature conditions.	
Thesagro: 	Análise do solo; Fósforo; Potássio; Resina.	
Thesaurus Nal: 	Phosphorus; Potassium; Resins; Soil analysis.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/150157/1/CNPASA-2016-jas.pdf	
Registro original: 	Embrapa Pesca e Aquicultura (CNPASA)	
Exemplares: 	CNPASA - (430-1) - UPC - AP - DD - CNPASA_AP35 -  - 2016.035 - DIS