The Effect of Deficit Irrigation on Product of Sorghum (Sorghum bicolor L.)

Abstract

This research was conducted in Western Zahed station in Tartous during the agricultural season (2019), to study the impact of deficit irrigation in Sorghum plant productivity by using three water treatments: full irrigation, 75% of full irrigation, and 60% of full irrigation, the experiment was designed by full random sectors method, drip irrigation method was used.

Watering process happened when soil moisture reached to 80% of field capacity, and continued until 100% of field capacity in the full irrigation treatment, 75% of full irrigation, and 60% of full irrigation treatments were provided in 75% and 60% of water that the full irrigation treatment was provided in, respectively.

The highest productivity was achieved in the full irrigation and 75% treatments with average 1.367 tons/h, and 1.300 tons/h, respectively, with no

significant differences, while the treatment 60% achieved an increase in the water use efficiency by 44.86%, compared to the full irrigation treatment.