University of Tabriz Water and Soil Science 2008-5133 28 4 1970 01 01 Effects of Irrigation with Treated Urban Wastewater on Yield and Some Growth Characteristics of Tomato and Corn in Greenhouse Condition Effects of Irrigation with Treated Urban Wastewater on Yield and Some Growth Characteristics of Tomato and Corn in Greenhouse Condition 19 29 8449 FA B Karimi Assist. Prof. of Water Sciences and Engineering Department, University of Kurdistan, Iran CH Abdi Former Student of Water Sciences and Engineering Department, University of Kurdistan, Iran Z Fathi Tileko Former Student of Water Sciences and Engineering Department, University of Kurdistan, Iran Journal Article 1970 01 01 The water scarcity is one of the crucial problems in arid and semi-arid regions such as Iran. Therefore, application of unconventional water, where suitable quality water supplies are not available, is increasing. One of these sources is treated urban wastewater (TUW), which can supply water and nutrient requirements of plants. Therefore, in this research, growth and yield of corn (<em>zea mays</em>-single cross 260) and tomato plants (<em>solanum lycopersicum</em> tiger) were evaluated using TUW under greenhouse conditions. The experiment was done as a randomized complete design with three replications. In this research, three treatment of irrigation water were applied including TUW, alternative TUW- water and water. The results showed that the application ofTUW had a significant effect on increase of the corn and tomato yields when compared to the treatment of water application. The highest and lowest impacts of TUW on tomato growth indices were related to leaf dry weight (28.6%) and stem diameter (6%), respectively. Similarly, these extreme amounts in the corn were related to the grain weight (28%) and corn diameter (10 %), respectively.So, considering the water scarcity, this method can play significant role in the sustainable development and decreasing the irrigation and fertilization costs. Thus, application of TUW as a new water resource can reduce commercial fertilizer usage due to containing rich nutrient elements (nitrogen, phosphorus and other macro and micro nutrients). The water scarcity is one of the crucial problems in arid and semi-arid regions such as Iran. Therefore, application of unconventional water, where suitable quality water supplies are not available, is increasing. One of these sources is treated urban wastewater (TUW), which can supply water and nutrient requirements of plants. Therefore, in this research, growth and yield of corn (<em>zea mays</em>-single cross 260) and tomato plants (<em>solanum lycopersicum</em> tiger) were evaluated using TUW under greenhouse conditions. The experiment was done as a randomized complete design with three replications. In this research, three treatment of irrigation water were applied including TUW, alternative TUW- water and water. The results showed that the application ofTUW had a significant effect on increase of the corn and tomato yields when compared to the treatment of water application. The highest and lowest impacts of TUW on tomato growth indices were related to leaf dry weight (28.6%) and stem diameter (6%), respectively. Similarly, these extreme amounts in the corn were related to the grain weight (28%) and corn diameter (10 %), respectively.So, considering the water scarcity, this method can play significant role in the sustainable development and decreasing the irrigation and fertilization costs. Thus, application of TUW as a new water resource can reduce commercial fertilizer usage due to containing rich nutrient elements (nitrogen, phosphorus and other macro and micro nutrients). https://water-soil.tabrizu.ac.ir/article_8449_0395a25e123c5b970af5f157d73a4af5.pdf