Role of Regular and Deficit Irrigation on Growth and Yield of Corn in Gypsiferous Soil

Abstract

Field experiment was carried out to determine the effect of regular and deficit irrigation on the growth and corn yield in a gypsifereous soil. at the experimental station of soil and water resources department, college of Agriculture, Tikrit university. located at 34°40 49 and 43° 38 40 longitude and 129m above sea level. The experiment was conducted with a split plot design. The main plots consist of three irrigation levels I1,I2 and I3(irrigation after 25, 50 and 75% after the available water depletion respectively). While sub plots consist of deficit irrigation treatment d0,d1, d2,d3,d3 and d4 (omitting two irrigations at (seedling , vegetative growth , flowering and grain maturity plant growth stages respectively. Corn seeds variety :Cadz were planted on 20/7/2013 for fall season and harvested at the end of growing season on 15/11/2013 highest of leaf area, dry mater, grain yield with (I1 d0) treatment was 581.33 cm2.plant , 6936.0 kg.ha-1 ,7166.70 kg.ha-1. consumptive water for (di) between 554.2 – 611.6 mm.. The highest dry mater of root 5425.41.0 kg.ha-1 with (I3 d2) treatment.