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The region of Vicosa in Brazil stands out for vegetable production. For success in this activity, the correct choice of cultivar with the correctly applied irrigation are necessary. As such, the aim of this study was to evaluate the agronomic performance of radish cultivars submitted to different irrigation depths. The radish crop was grown in a protected environment over three cycles, for periods of 38 to 40 days. The experimental design was of randomised complete blocks in split plots with five replications, comprising five irrigation depths (50, 75, 100, 125 and 150% of crop evapotranspiration-ETc) in the plots, with three radish cultivars in the subplots. (Hybrid no 25 - Sakata, Crunchy Royale - Sakata and Vip Crimson - Feltrin). A drip irrigation system was used, with the ETc obtained by means of the GESAI method. The following parameters were evaluated: root depth, plant water potential, leaf temperature, leaf weight, root diameter and length, number and weight of commercial and non-commercial roots, and water use efficiency. Since the experimental soil presented high water retention and availability, greater than 1.8 mm cm-1, an irrigation depth of 50% ETc is recommended, provided that the soil is at field capacity at the start of the cycle. When considering productivity and quality, the Crunchy Royale cultivar is recommended when cultivating the radish in Vicosa, Brazil.

Irrigation of radish cultivars in the region of Viçosa, Minas Gerais, Brazil