Época de colheita de cultivares de trigo-mourisco (Fagopyrum esculentum Moench)

Abstract

Fagopyrum esculentum is a pseudocereal with high market value and low production cost. Brazil is an exporter and consumer of grains and rutin from this plant. However, there is a lack of studies aimed at the production of the species in many regions of the country. Thus, the objective of this study was to evaluate the production of flavonoids and agronomic attributes of F. esculentum cultivars as a function of harvest time. The experiment was conducted at the Institute of Agricultural Sciences of the Federal University of Minas Gerais, in pots in the greenhouse, in a completely randomized design, with four replicates. The treatments were eight harvest times (15, 30, 45, 60, 75, 90, 105 and 120 days after emergence) and two cultivars (‘IPR 92’ and ‘IPR 91’) in a factorial scheme (8 x 2). The data were subjected to variance and regression analyses. The ideal is to harvest F. esculentum between 71 and 86 days after emergence, aiming at grain and rutin production. ‘IPR 91’ is the earliest cultivar, has a lower total flavonoid content (8.75 mg g-1), rutin production (32.86 mg) and dry matter production (3.54 g) than ‘IPR 92’ (12.58 mg g-1, 42.68 mg, and 3.72 g, respectively).