Abstract

A field experiment has been carried out in autumn – 2013 on corn (Zea mays L.) var. 5018 to study the effect of irrigation depth on some plant growth parameters. A surface drip irrigation system was used after field evaluation for the system at 50 Kpa pressure to determine the actual discharge of the emitters and some technical specifications of the system. The experiment included 13 treatments, namely, C100 as a control treatment, V20, V40, v60, V80 as a treatments that exposure to 20, 40, 60 and 80% moisture stress in compare with control at vegetation stage, while F20, F40, F60, F80 and GF20, GF40, GF60, GF80 are treatments that exposure to the same ratios of moisture stress at flowering and grain formation stages, respectively. The treatments were distributed according to Randomized Complete Block Deign (R.C.B.D.). Plant high, leaf area, depth and weight of roots were measured at the end of vegetative and flowering stages. The results showed that control treatment achieved the highest high of the plant reached to 174 and 185 cm. at the end of vegetative and flowering stages, respectively.
Also achieved a higher leaf area, reached to 5925 and 6060 cm2 at the same stages, respectively. In addition, V80 treatment achieved the highest weight rate of roots reached to 44 gm. Plant-1. It did not differ with control treatment. In the same time, consumptive use was 732 mm.season-1. In addition, vegetative growth stage was the more sensitive for moisture stress.