Evaluación de dos sustratos para la produccion de dos variedades de girasol (Helianthus annuus L.) en invernadero.

Abstract

This present investigation objective was to evaluate different substrates to produce sunflower (Helianthus annuus L.) in greenhouses for which pomina and rice husk were used with two sunflower varieties, Sunbright and Vincent Choice. Data evaluation was carried out in 12 experimental units comprising four treatments and three replications, with a total of 312 plants in the trial, evaluating 120 plants in total from all treatments, 10 plants were selected at random per treatment, the coefficient of variation was determined and expressed as a percentage. When the differences were significant for cultivars and/or substrates a LSD was used to separate averages at 5%. The data analyzed were the yield percentage, plant height, stem diameter, number of leaves at 30 and 60 days after transplanting, days to harvest and total number of stems cut, in order to find the benefit/cost ratio for each treatment. The results showed highly significant differences in the agronomic performance in favor of the Vincent Choice variety, likewise in the case of the most effective substrate for sunflower production was rice husk, the highest benefit/cost ratio presented the rice husk substrate plus the Vincent Choice variety with 2.46 and a profitability of 145.79%. It was recommended to cultivate sunflower of the Vincent Choice variety in the rice husk substrate to obtain stems and flowers of good quality and a better yield per hectare cultivated with a high benefit/cost ratio.