Effect of Using Wastewater from a Yeast Production Plant on Yield and Yield Components of Wheat in Qaramalek Area of Tabriz

In order to assessment the effects of wastewater of Iran-Mayeh company (yeast manufacture) on grain yield and some yield components of wheat، a factorial experiment based on randomized complete block design was conducted in three replications. The first factor comprised irrigation frequencies in 3 levels (I1= once one irrigation with given concentrations of wastewater، I2= two twice irrigations with given concentrations of wastewater and I3= irrigation in whole of plant growth period (three irrigations) with given concentrations of wastewater) and the second factor comprised of wastewater concentration in 6 levels (P0= well water (control)، P15=15% wastewater +85% well water، P30= 30% wastewater +70% well water، P45= 45% wastewater +55% well water، P60= 60% wastewater +40% well water and P100= 100% wastewater). Results indicated that the highest 1000 grain weight and fertile florets number per spike were observed at well water (control) and 100% waste water concentration treatments، respectively. Maximum grain yield and fertile tiller number were achieved in irrigation in whole of plant growth period (three irrigations) with given concentrations of wastewater. The irrigation in whole of plant growth period (three times) with determined concentrations of wastewater compared to once and twice irrigation with wastewater increased grain yield by 13. 6% and 5. 7%، respectively.