RICE (ORYZA SATIVA L.) YIELDS DEPENDING ON CULTIVARS AND QUALITY OF IRRIGATION WATER

Abstract

The goal of our study was to determine whether they are appropriate for utilization by the reuse for irrigation of rice. Field experiments were conducted during the period from 2012 to 2015 at the rice checks of the Institute of Rice of the NAAS of Ukraine. We studied the effect of the mixed water containing 25% of the effluent and drainage water diluted with the pure water of the Dnipro river on the grain yields of different rice cultivars, viz. Prestyzh, Serpnevyi, Ontario and Vikont. The results of the study proved the possibility of reuse of the mixed effluent and drainage water for irrigation of rice. There was no significant decrease in the crop productivity: yield losses averaged just to 4.45-5.43% depending on the cultivar. Besides, we established that the best yielding capacity in the experiments was provided by the middle-ripening rice cultivar Vikont with grain yields of 9.73-10.26 t/ha depending on the water quality used for its irrigation. We recommend reuse of the effluent and drainage water for irrigation of rice in the check systems to improve the environmental conditions of the Black Sea coastal areas.