Investigating of Cotton Yield under Irrigation with Urban Treated Wastewater (Case Study: Torbat-Heydarieh)

However, the limitations of water resources in arid and semi-arid regions can provide a reuse of treated wastewater and compensate for water scarcity in these areas, but it should be careful about its unhealthy and unproductive consumption, especially for irrigation of food plants such as vegetables. In order to investigate the effect of treated wastewater in Torbat Heidarieh urban wastewater treatment, a field experiment was conducted. The research was carried out in a completely randomized design with five irrigation water treatments and three replications. The treatments included well water (Control), treated wastewater, a volumetric composition of 50% of well water and 50% of treated wastewater, watering one among water and sewage, a volumetric composition of 33% of well water and 66% of treated wastewater (used by farmers in the area). Based on the results obtained from the mean square of traits, the effect of irrigation water type on cotton weight, kiel percent, seed index, number of boll, stem diameter and plant height was significant at 1% probability level. The results showed that the highest value for cotton weight, kiel percentage, seed index and number of bolls in T3 treatment with values ​​of 11.9 g, 76.3%, 0.65 and 13.3, and the lowest for cotton seed weight parameters, Kilogram percent, seed index and number of bolls were obtained in control treatment with 9.99 g, 59.4%, 52.2 and 9.3, respectively.