Data/hora: 10/06/2024 02:24:51

Provedor de dados: 	90	
País: 	Brazil	
Título: 	Flooded rice yield as affected by levels of water salinity in different stages of its cycle	
Autores: 	Fraga,Thiago Isquierdo; Carmona,Felipe de Campos; Anghinoni,Ibanor; Genro Junior,Silvio Aymone; Marcolin,Elio.	
Data: 	2010-02-01	
Ano: 	2010	
Palavras-chave: 	Yield components; Spikelet sterility; Oryza sativa.	
Resumo: 	Losses of productivity of flooded rice in the State of Rio Grande do Sul, Brazil, may occur in the Coastal Plains and in the Southern region due to the use of saline water from coastal rivers, ponds and the Laguna dos Patos lagoon, and the sensibility of the plants are variable according to its stage of development. The purpose of this research was to evaluate the production of rice grains and its components, spikelet sterility and the phenological development of rice at different levels of salinity in different periods of its cycle. The experiment was conducted in a greenhouse, in pots filled with 11 dm³ of an Albaqualf. The levels of salinity were 0.3 (control), 0.75, 1.5, 3.0 and 4.5 dS m-1 kept in the water layer by adding a salt solution of sodium chloride, except for the control, in different periods of rice development: tillering initiation to panicle initiation; tillering initiation to full flowering; tillering initiation to physiological maturity; panicle initiation to full flowering; panicle initiation to physiological maturity and full flowering to physiological maturity. The number of panicles per pot, the number of spikelets per panicle, the 1,000-kernel weight, the spikelet sterility, the grain yield and phenology were evaluated. All characteristics were negatively affected, in a quadratic manner, with increased salinity in all periods of rice development. Among the yield components evaluated, the one most closely related to grain yields of rice was the spikelet sterility.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000100018	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/S0100-06832010000100018	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.34 n.1 2010	
Fonte: 	info:eu-repo/semantics/openAccess