Data/hora: 16/06/2024 16:15:50

Provedor de dados: 	Ciência e Agrotecnologia	
País: 	Brazil	
Título: 	Alternative sources of potassium for maize cultivation	
Autores: 	Boldrin,Paulo Fernandes; Souto,Hugo Ferreira; Salles,Lenise Selaysim; Furtini Neto,Antonio Eduardo.	
Data: 	2019-01-01	
Ano: 	2019	
Palavras-chave: 	Zea mays; Phonolite; Calcined glauconite.	
Resumo: 	ABSTRACT Brazil is the largest importer of potassium (K) fertilizers in the world, importing about 95% of all the potassium consumed by its agriculture. Thus, new sources and technologies to increase K availability have been studied. This study aimed to evaluate the agronomic viability of the use of calcined glauconite and phonolite blended and granulated with two organic materials on maize growth in pots, using two soils of contrasting texture in a controlled environment. Were evaluated eight sources of potassium: phonolite; phonolite + poultry manure; phonolite + cattle manure; calcined glauconite; calcined glauconite + poultry manure; calcined glauconite + cattle manure; negative control (no K); and positive control (K - KCl), and two soils of contrasting texture. The experiment was carried out for 38 d. The following parameters were analyzed: plant height, stem diameter, shoot dry mass, leaf number, leaf contents of nitrogen (N), K and phosphorus (P), and the SPAD chlorophyll meter. In the sandy soil, the source consisting of phonolite + chicken manure was similar to KCl application regarding plant height, stem diameter and shoot dry mass. As for the clayey soil, when both rocks were blended with the organic wastes, they were similar to KCl for shoot dry mass. The use of pure granulated rocks, calcined glauconite and phonolite without blending with the organic residues is not efficient to provide available K to maize plants.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100247	
Editor: 	Editora da Universidade Federal de Lavras	
Relação: 	10.1590/1413-7054201943023619	
Formato: 	text/html	
Fonte: 	Ciência e Agrotecnologia  v.43 2019	
Fonte: 	info:eu-repo/semantics/openAccess