A study was conducted at Sumé County, State of Paraiba, Brazil, aiming to determine the effects of five water levels (daily irrigations with 20, 40, 60, 80 and 100 % of the Class A Evaporation Pan) on the seed germination of two carrot cultivars (Tropical and Brasília). The experimental plots were planted according to local recommendations and irrigated with manual irrigators. The statistical layout was a factorial randomized block design (5x2) with three replicates. The effect of the water levels on the seed germination was statistically significant, at the 1% level of probability, and the regression curve obtained was y = - 15.82 + 1.0542x - 0.005621x². The highest germination was obtained with the water management that replaced daily 80 and 100% of the water daily evaporated from Class A evaporation pan. The lowest germination was found when the irrigation replaced only 20% of the pan evaporation. No effect was observed for the cultivar treatment, blocks and for interaction. To obtain the best germination for both cultivars, when cropped in this region, it is recommended to irrigate daily with a water level equivalent to 80% of the Class A pan evaporation.
irrigation; evaporation; germination; Daucus carota L
