The effect of different irrigation levels on the efficiency and quality of watermeon growed with drip irrigation method

This study was carried out in the Harran Plain in 2022 using drip irrigation method in semi-arid climate conditions. The research was carried out in randomized blocks according to the divided plots experimental design, with 3 replications as 2 main and 4 sub-topics. In the study, two different irrigation intervals (D4: 4 days; D8: 8 days) were used as the main subject and 4 different irrigation levels (I1: 125%, I2: 100%, I3: 75%, I4: 50%) as the sub-topic. In the study, the yield and quality parameters of different irrigation intervals and irrigation levels on the plant were examined. During the research period, water was applied to D4 subjects a total of 16 times, 12 of which were on the subject, while water was applied to D8 subjects a total of 10 times, 6 of which were themed. While the amount of irrigation water applied to the trial subjects varied between 418 mm and 785.3 mm, the water consumption values of the subjects differed between 458.9 mm and 927.1 mm. While it is observed that the applied irrigation water has a positive effect on the examined physical parameters, it cannot be said that it has the same positive effect on the oil ratio. Highest seed yield (354.7 kg da-1), thousand grain weight (61.2 g da-1), yield per head (7.5 g tray-1), head diameter (23.7 cm), plant height (125.6 cm), crude oil yield (117.2 kg da-1) and 4 days irrigation interval, the irrigation level was 125% (D4-I1). The oil ratio (42.2%) with its highest value was obtained from the 8-day irrigation interval and the 50% irrigation level applied (D8-I4).