Estimation of Production Function and Water Use Efficiency on Eggplant in Drip Irrigation and Nitrogen Fertilizer

Access to irrigation scheduling and water and nitrogen management effects on growth of eggplant, because it When can increase the yield of the proper management of water and fertilizer is needed. The present study was undertaken to investigate the possibility of reducing water consumption at eggplant plants using drip irrigation tape (Tape) and Appropriate amount of nitrogen fertilizer and its effect on crop yield and the production function and Crop coefficient (Kc) and Crop drought resistance factor (Ky), in a randomized complete block design with three replications in the city of Astaneh Ashrafiyeh in 2010 crop year. Main plots consisted of non-irrigated (dryland) and drip irrigation management, 60, 80 and 100% of crop water requirement and two minor amounts of nitrogen including zero, 90, 120 and 150 kg.N.ha-1 were applied. The results showed that Drip irrigation at 100% of crop water management with the application of 120 kg.N.ha-1 produced maximum yield was with 51.9 ton.ha-1. WUE values varied in the range of 4.20 to 11.42 kg/m3 in relation to nitrogen management and irrigation had a greater effect on yield. Crop coefficient obtained during the growing season varies for Eggplant was between 0.8 to 0.9 while resistance factor was Ky =1.06. The results showed that there were significant differences in plant height and length of the roots in irrigation management, and content management across the product nitrogen. But yield, number of leaves, length and width of the product and water use efficiency of eggplant were affected by the amount of irrigation water and fertilizer and their interactions.