Estudio de densidades de poblacion para el cultivo del girasol en suelos pardos

The work was accomplished in the Agricultural Esperimental Station. "Alvaro Barba" of Las Villas Central University in a brown soil with differentiation of carbonates.There were studied four densities of population between 37000 and 71000 plants per hectare, in theree varieties of sunflower (Helianthus annus L.). It was used a bifactorail design and the field work was mounted in plots of five furrows and five meters of lengtheach one, four replications were used. There were evaaluated thirteen variables and the results were processed statically acording to the package SPSS-PC. In th results it is observed that some components of the yield, such as the diameter of the capitulum are affected when it is increased the density of population. On the contrary the grain yield is not affected by the increment of population density . The oil percentage does not vary when the population densities are changed.El trabajo se realizo en la Estacion Experimental Agricola "Alvaro Barba" de la Universidad central de las Villas,en un suelo pardo con diferenciacion de carbonatos .Se estudiaron cuatro densidades de poblacion en un rango que oscila entre 37000 y 71000 plantas por hectarea , en tres variedades de Girasol (Helianthus annus L).Se utilizo un diseño bifactorial y el trabajo de campo se monto en parcelas de cinco surcos y cinco metros de largo cada una, replicando cuatro veces.Se evaluaron trece variables y los resultados fueron procesados estadisticamente segun el paquete SPPS-PC.En los resultados se observo que algunos componentes del rendimiento ,como el diametro del capitulo ,se ven afectados cuando se incrementa la densidad de poblacion ,no siendo asi el rendimiento en grano .El porcentaje de aceite no varia con las densidades de poblacion