Data/hora: 12/06/2024 15:43:02

Provedor de dados: 	91	
País: 	Brazil	
Título: 	Water salinity, nitrogen and phosphorus on photochemical efficiency and growth of west indian cherry	
Autores: 	Sá,Francisco V. da S.; Gheyi,Hans R.; Lima,Geovani S. de; Paiva,Emanoela P. de; Moreira,Rômulo C. L.; Silva,Luderlândio de A.	
Data: 	2018-03-01	
Ano: 	2018	
Palavras-chave: 	Chlorophyll fluorescence; Saline stress; Fertilization; Malphigia emarginata.	
Resumo: 	ABSTRACT The objective of this study was to evaluate the interaction between water salinity and doses of nitrogen and phosphorus on chlorophyll a fluorescence and on the growth of West Indian Cherry (‘acerola’) plants in the initial growth stage. The research was carried out in a protected environment, in lysimeters filled with Regolithic Neosol of loamy clay texture and low initial phosphorus content. The experiment was conducted in a randomized block design, arranged in a factorial scheme with two factors, five levels of electrical conductivity of the irrigation water - ECw (0.6, 1.4, 2.2, 3.0 and 3.8 dS m-1) and four proportions of the recommendation of phosphorus/nitrogen - P/N (100:100, 140:100, 100:140 and 140:140% P/N of recommendation), with three replicates, and each plot consisted of one plant. Water salinity above 2.2 dS m-1 decreases the quantum efficiency of photosystem II and the growth of west indian cherry plants. Increase in nitrogen and/or phosphorus supply improves the energy stability of west indian cherry plants by reducing the effects of salt stress on the quantum efficiency of photosystem II. The increase of 40% in the nitrogen dose increased the chlorophyll a fluorescence, but did not influence the plant growth.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000300158	
Editor: 	Departamento de Engenharia Agrícola  - UFCG	
Relação: 	10.1590/1807-1929/agriambi.v22n3p158-163	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Engenharia Agrícola e Ambiental  v.22 n.3 2018	
Fonte: 	info:eu-repo/semantics/openAccess