Evaluación de tres reguladores de acidez en el cultivo de girasol (Helianthus annuus) a campo abierto en la parroquia Nuevo Paraíso-Orellana

Abstract

In Francisco de Orellana canton producers are unaware of soil acidity (low pH), affecting plant growth therefore, the aim this research was to evaluate three acidity regulators in sunflower crop (Helianthus annuus) to establish agronomic recommendations in Nuevo Paraíso parish in Francisco de Orellana canton. The design used was an A x B factorial arrangement, where factor A (acidity regulator) has 3 levels (calcium hydroxide, calcium carbonate and calcium silicate) and factor B (regulator dose) has 2 levels (200 g/m2 and 400 g/m2). The above factor levels are combined and 6 treatments are obtained with their respective 3 replicates; experimental phase consists six plants selected at random for each replicate giving eighteen plants per treatment, data were evaluated after 45 days. In the tabulation, the variance analysis was carried out with the Info Stat program with confidence level of 95 %. The variables pH was evaluated, which turned out to be more efficient with the treatment T2 calcium hydroxide with a dose 400g/m2 giving a value of (7,75), in the same way the treatment T2 showed better results in the variables: height of the plant (140,50cm) and stem diameter (2,00cm), in the leaves variable number (33,61 units) it showed better results with the treatment T6 calcium silicate with a dose of 400g/m2. Electrical conductivity was not significant with both treatments. It is concluded the most efficient acidity regulator is calcium hydroxide with a dose of 400 g/m2, however, given the cost of regulators, treatment T3 Calcium carbonate with a dose 200 g/m2 is recommended.