Avaliação de qualidade fisiológica de sementes de algodão colorido por meio de diferentes testes de vigor e germinação

Abstract

The success of crops depends directly on the “seeds” factor, which must have high quality. The objective of this work was to evaluate the physiological performance of cotton seeds of the cultivars BRS Jade and BRS Verde, submitted to different laboratory analyses. A completely randomized design with a 2 x 4 x 10 factorial scheme was used, in which there were two treatments, four replications and ten different laboratory analyzes studying vigor, viability and germination. The tests carried out were the weight of a thousand seeds (g), germination test (7 days), accelerated aging (40 °C/72 h), electrical conductivity (50 seeds/75 mL of water; 25 °C/24 h), moisture content (105 ± 3°C/24 h), first germination count (4 days), low temperature germination (7 days - 15º to 18º), Germination speed index (IVG - daily), first count emergency test (7 days), and emergency field test (14 days). In terms of vigor, the germination, low temperature germination, electrical conductivity and accelerated aging tests proved to be efficient in separating treatments. With the tests it was possible to analyze and differentiate the physiological quality of the treatments, in which BRS Jade presented to be the cultivar with the best physiological quality.