Application of SWRT Technique to Reduce Stress and Water supply

Abstract

The increasing of temperature with reduction of rainfall in dry season led to reduce water areas which cause reduce the cultivation areas in Iraq and other countries. Effecting of drought causing negative action on crop productivity. The irrigation water shortage will impact on crops by stress of water as well water decreasing will increase salt concentration that will increase the salt stress cause influence on yield of crops. This research will study of stress by decreasing of water (deficit irrigation) on production of okra crops with both use subsurface water retention techniques (SWRT) and without use SWRT, then estimation differences after that calculate affection of salt on crop. The research was done in Babylon governorate in Al-Hindiya Barrage. The treatments A1 used drip irrigation system with SWRT technique and used deficit irrigation in some times, while A2 used trickle irrigation without SWRT and use deficit irrigation in some times. The results of treatment A1 showed the amount of applying water reduced to 7% than A2. Whereas the number of irrigations of A1 equal to A2. The yield of crop of A1 was more than of A2 by 15 %. The actual yield of A1 was impacted by water stress and salt were 0.01 kg/m2 and 0.011 kg/m2 respectively. The actual yield of A2 which impacted by water stress and salt were 0.079 kg/m2 and 0.085 kg/m2, respectively. The yield in A1 with SWRT and without stress and the yield of A2 without SWRT and without stress showed percent of increasing of 2.3%. The SWRT technique helps to stress resistance and drought resistance by using okra of loam soil.