Analysis of growth and yield of soybean cultivars in the dry season
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Abstract
With the objective of analyzing the growth and yield of soybean cultivars in the cold season, this work was developed in areas of the Scientific and Technological Base Unit, Los Palacios, Pinar del Río, belonging to the National Institute of Agricultural Sciences. Soybean cultivars Incasoy-1, Incasoy-24, Incasoy-27, DT-20, DT-26 and D-2101 were used, which were sown on a Hydromorphic Gley Nodular Ferruginous Petroferric soil, on two different years (January 2016 and 2017), corresponding to the cold season. A randomized block experimental design with six treatments (the cultivars) and four replications was used, and the total dry weight of the aerial part (g) and the leaf area (m2) were determined in each experimental plot. The growth dynamics of these variables was fitted to a second-degree polynomial exponential mathematical function, and the leaf area index (LAI) and the absolute growth rate (AGR) were calculated. Agricultural yield (t ha-1) was also determined, performing a confidence interval from the standard deviation on the obtained means, with a probability of 95 % confidence. The results showed influence of the sowing date on the different growth indicators, both in the maximum value reached by the variable, and in the moments in which it was achieved, while it was possible to infer that the greater the accumulation of biomass, a higher yield was reached, highlighting the cultivars DT-20 and DT-26.
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