عنوان مقاله [English]
The experiment was carried out as split plot based on randomized complete block design with three replications at Agricultural Research Station of Ardabil in the sweet corn (Hybrid Chase; the Seminis Company). The main plots were four levels of water deficit stress including irrigation after 70 (as control), 100, 130 and 160 mm evaporation from the class A pan, and the sub-plots were four levels of ascorbic acid as 0, 150, 200 and 250 ppm.
Results: Foliar application of ascorbic acid had a significant effect on grain yield, seed attributes, plant height, biomass, pigment contents and leaf area in corn plant under water deficit stress. Water deficit stress dressed grain yield, plant height, biomass, pigment contents and leaf area. The heights grain yield was achieved at 70 mm evaporation from the class A with foliar application of 150 and 250 ppm ascorbic acid. The heights pigment contents were achieved at 100 mm evaporation from the class A with foliar application of 150 ppm ascorbic acid, and also the heights leaf area of the corn plant was achieved at 100 mm evaporation from the class A with foliar application of 250 ppm ascorbic acid. High significant correlations were observed between grain yield and seed attributes, plant height, biomass and leaf area in the corn plant.
Conclusion: Although foliar application of ascorbic acid reduced water deficit stress effects, also and improved grain yield of corn plant.