Data/hora: 09/06/2024 09:37:20

Provedor de dados: 	Pesquisa Agropecuária Brasileira	
País: 	Brazil	
Título: 	Normal nutrient ranges and nutritional monitoring of 'Pêra' orange trees based on the CND method in different fruiting stages	
Autores: 	Dias,Jairo Rafael Machado; Wadt,Paulo Guilherme Salvador; Partelli,Fábio Luiz; Espindula,Marcelo Curitiba; Perez,Daniel Vidal; Souza,Fábio Régis; Bergamin,Anderson Cristian; Delarmelinda,Elaine Almeida.	
Data: 	2017-09-01	
Ano: 	2017	
Palavras-chave: 	Citrus limonia; Citrus sinensis; DRIS; Leaf sampling; Nutritional balance index; Reference population.	
Resumo: 	Abstract: The objective of this work was to determine reference values for evaluating the nutritional status of 'Pêra' orange trees in different fruiting stages, using the compositional nutrient diagnosis (CND) method. The study used 243 leaf samples from 81 plots, with samplings performed in plants bearing fruits with three and six months of age, and also in the main harvest (nine months). Plots with productivity higher than 30 Mg ha-1 were selected for the establishment of reference standards. Three normal ranges were evaluated for each nutrient in the reference population, comprehended by the confidence interval (CI) of the foliar content averages, by the mean±standard deviation (±SD), and by the mean±⅔SD. Regardless of the normal range of nutrients used, the leaf sampling periods interfered with the nutritional status of 'Pêra' orange tree. The normal ranges obtained from the criteria CI and ±⅔SD of the nutrient contents observed in the reference population frequently provided similar nutritional diagnoses. Zn, Ca, and Fe are the elements that most often limit the production of 'Pêra' orange in the state of Amazonas, Brazil.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000900776	
Editor: 	Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira	
Relação: 	10.1590/s0100-204x2017000900010	
Formato: 	text/html	
Fonte: 	Pesquisa Agropecuária Brasileira  v.52 n.9 2017	
Fonte: 	info:eu-repo/semantics/openAccess