Effects of water deficit stress on agronomical traits of maize hybrids in Arak climate condition

In order to study Effects of water deficit stress on agronomical traits of maize hybrids in Arak climate condition an experiment was conducted in the research station of Islamic Azad University- Arak Branch, Iran in 2009. The experimental design was split plot based on randomized complete blocks design with three replication. The treatments composed of irrigation levels: %100, %75 and %50 crop water requirement plant and maize hybrids consisted of KSC500،KSC524, KSC700، KSCو 704 DSC370. Results showed that of water stress reduced grain yield. Decreasing yield grain belonged to decreasing kernel number per ear. In between hybrids, the highest grain yield obtained from early and medium maturity hybrids. Interactions effects of treatments showed that, in optimum condition of moisture and medium water stress, grain yield in KSC524 had high compared to other hybrids. The highest grain yield equal 8624. 22 Kg ha-1 obtained from KSC524 in condition of %100 crop water requirement plant and lowest grain yield equal 4072. 32 obtained from KSC700 along %50 r crop water requirements.