Effect of defficit irrigation and waste water on yield and yield components of corn and water use efficiency in Pakdasht area

One of the major challenges facing of agriculture in the present day is to produce more food, using less water. This research investigates the effects of deficit irrigation and urban wastewater treatment on biomass, grain yield, yield components and water use efficiency in single grain crosses 704 maize. The research was designed in a randomized complete block with two irrigation water types (well water (I) and wastewater (W)) and three level of irrigation treatments of 100 (D1), 75 (D2) and 55% (D1) water requirement in three replications, in research field of collage of abourihan, university of Tehran in Pakdasht city during the 2018. The results showd that, the highest plant biomass yield was 2.927 kg / m2 for full irrigation with wastewater and there was no significant difference between D1 and D2 treatments and only a decrease of 11.1% was observed. The highest Grain yield was observed 1.597 kg/m2 in full irrigation with wastewater treatment. The grain yield in W treatment was 10.65% higher than I treatments, but this difference was not different significant. The highest water use efficiency was obtained for treatment of 75% with wastewater and equal to 5.3 kg.m-3 of water