İnvestigation effect of deficit irrigation technique on second crop sweet sorghum biomass and bioethanol yield

The study was carried out in 2017 in Çukurova University, Faculty of Agriculture, Department of Agricultural Structures and Irrigation. The aim of this study is to investigate the effects of different irrigation water levels (I100, I75, I50, I25) on the biomass and theoretical bioethanol yield of the sorghum plant during the plant development periods. In this research, irrigation water between 479.6 and 227.8 mm was applied to the experimental subjects. The dry matter yield obtained in the study ranged from 6007.4 to 3661.8 kg da-1, and the highest dry matter yield was obtained in the fully irrigation level. In this study, height measurements of sorghum plant ranged between 388.5 cm and 283 cm. Irrigation water usage efficiency (IWUE) was determined as 16.07 and 12.43 kg / da mm. WUE efficiencies are between 10.2 kg / damm and 9.4 kg / da mm. The yield reactor (ky) value obtained from the experiment subject was determined as 1.17. The biomass yield obtained from the study ranged from 8733 to 13300 kg da-1 and bioethanol yield ranged from 189 to 326 L da-1. In the study, no difference was observed in brix (%) values under different irrigation conditions, sugar yield was the highest value in terms of full irrigation, and I50 and I25 subjects were close to each other. Sugar yield varied between 612 and 354 kg da-1.