Data/hora: 09/06/2024 11:30:40

Provedor de dados: 	Revista Ciência Agronômica (RCA)	
País: 	Brazil	
Título: 	Effect of fertilisation with urea on development in the ornamental bromeliad Aechmea fasciata	
Autores: 	Giampaoli,Patricia; Santos,Daniela Soares dos; Mollo,Luciana; Kanashiro,Shoey; Tavares,Armando Reis.	
Data: 	2017-10-01	
Ano: 	2017	
Palavras-chave: 	Bromeliaceae; Nitrogen; Mineral nutrition; Chlorophyll.	
Resumo: 	ABSTRACT The aim of this study was to evaluate the effect of urea fertiliser on the bromeliad, Aechmea fasciata. Plants were submitted to weekly treatments with a solution of 0.0, 0.5, 1.0, 1.5 or 2.0 g urea L-1. After 210 days of the experiment, biometric variables of growth and development of the root and shoot systems were analysed, together with foliar levels of chlorophyll a and b, and of carotenoids. The experimental design was of randomised blocks with four replications; eight plants were used per plot. The data were submitted to regression analysis. The highest values for chlorophyll a and carotenoid content were obtained at a concentration of 1.23 g L-1 urea, and for chlorophyll b at a concentration 1.75 g L-1 urea. Plants of A. fasciata submitted to a solution with no nitrogen showed marked chlorosis of the leaves and reduced growth and development. The mean value for the maximum levels of photosynthetic pigments was 1.40 g L-1 urea, and this can be used as an indicator of the nutritional status of nitrogen in the species. From the results, an application of 1.46 g L-1 urea to the tank in A. fasciata is recommended, as this gave the greatest accumulation of total dry weight and an increase in the number of leaves.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000400657	
Editor: 	Universidade Federal do Ceará	
Relação: 	10.5935/1806-6690.20170076	
Formato: 	text/html	
Fonte: 	Revista Ciência Agronômica  v.48 n.4 2017	
Fonte: 	info:eu-repo/semantics/openAccess