Effect of Different Irrigation Water Levels on Yield and Quality Parameters of Fodder Beet

The study was carried out at Isparta University of Applied Sciences, Faculty of Agriculture, Agricultural Research and Application Farm in 2021, with aim of determining the effect of different irrigation water levels on the yield and quality parameters of fodder beet by the experiment of randomized complete block design with three replications. The study used Rota fodder beet variety. Applied irrigation water amounts were determined according to Penman-Montheith method by consıdering the total reference crop evapotranspiration (ETo) of ten days for five different ratios (S1: ETo×1.20, S2: ETo×0.90, S3: ETo×0.60, S4: ETo×0.30; S5: ETo×0.00). The irrigation method used was drip. Applied irrigation mounts ranged between 131.9 mm - 643.6 mm. Crop water consumption (ET) ranged between 337.1 mm - 782 mm. According to the subjects, fresh leaf yield varied 570 – 1788.1 kg da-1, fresh root yield varied 1865.7 – 7838.8 kg da-1, total fresh yield varied 2435.8 – 9626.9 kg da-1, leaf dry matter yield varied 134.1 – 255.5 kg da-1, root dry mater varied 469.9 – 1247.6 kg da-1, tuber length varied 12.2 cm – 25.4 cm, and tuber diameter varied 6.5 – 12.4 cm. The yield response factor (ky) was 1.04. The water use efficiency was 72.3 – 145.0 kg ha-1 mm-1, the irrigation water use efficiency was 111.7 – 157.5 kg ha-1 mm-1. The S2 irrigation treatment was the most appropriate irrigation program under adequate irrigation water conditions. In terms of irrigation deficit conditions, results indicated that there may apply irrigation water at 60% or 30% of reference evapotranspiration from S3 or S4 irrigation program.