ınvestıgatıon of the leaf water potentıal changes of the fırst crop sweet sorghum ın dıfferent ırrıgatıon levels

This study was carried out in the experimental field of the Agricultural Structures and Irrigation Department of Çukurova University Faculty of Agriculture in 2018. In the research, the effects of different irrigation levels on leaf water potential and some plant growth parameters were investigated in the first crop sorghum plant. In the research, 4 different irrigation water levels, 100% irrigation (I1), 75% irrigation (I2), 50% irrigation (I3) and 25% irrigation (I4) and without irrigation (I0) were created during the plant development periods. In the study; irrigation waters were applied 414.2 mm (I1), 323.5 mm (I2), 232.9 mm (I3) and 142.2 mm (I4) into the treatments, with respectively. The dry matter yield were obtained ranged from 6020 to 3380 kg da-1, and the highest dry matter yield was obtained in the fully irrigation level. The leaf area index values were changed in the study ranged from 8.41 to 6.07 and the highest leaf area index value was obtained in the fully irrigation level. Height measurements of sorghum plant were ranged between 300 cm and 204.3 cm. Leaf water potential values as before irrigation were determined for the beginning, middle and end of period averaged measurements, respectively, for I1 treatment (-9 bar, -10.5 bar, -13 bar), for I2 treatment (-10 bar, -12.5 bar, 13.8bar ), for I3 treatment (-11 bar, -13 bar, -16 bar), for I4 treatment (-12 bar, -17 bar, -21 bar) and for I0 treatment (-14 bar, -19 bar, -24 bar).