Effect of Tape Irrigation Levels on Yield and Quality of Tomato in North of Khouzestan Province

     The goal of this research was evaluation of tape irrigation levels, 100%, 70% and 40%  water requirement (T_100, T₇₀ and T₄₀₎   and furrow irrigation (F) on the yield and water use efficiency (WUE) of summer tomato. The experiment was conducted in a randomized completely block design with four treatment and three replication for two years in Safiabad Agricultural Research Center. The resuls showed that the highest yield was in T₁₀₀ and T₇₀ with 54.6 and 53.4 t.ha^-1 in yield, respectively and increasing yield was 25% higher than Furrow irrigation. T₄₀ treatment with the lowest yield (42.9 t.ha^-1) had a significant difference at 1% with T₇₀ and T₁₀₀. Water use efficiency(WUE) was highest in T₄₀ (11.4 t.ha^-1) but there was no significant difference between it and T₇₀ treatment. In a general manner average of  WUE in all tape irrigation levels were about 2.3 times furrow irrigation. So T₇₀ treatment was proposed for Khouzestan climate conditions. No significant difference was between irrigation levels on tomato quality characteristics including Acidity, Scorbic acid and Sitric acid but severe deficit irrigation level (T40 treatment) was caused to increase Brix. Although soil salinity was not significant difference between irrigation levels, but it  was significant for soil depth, So that average of soil salinity in 0-30 cm was 1.4 dsm^-1 which it was 38% higher than 30-60 cm soil layer.