The effect of planting date on yield and yield components of maize hybrids in Ahvaz

In order to investigate the effect of sowing date on yield and dry matter redistribution in maize hybrids in Ahvaz. This experiment in the form of split plots in the form of a randomized complete block design with three replications in the crop year 2020-2021, it was performed at the station of Khuzestan Agricultural and Natural Resources Research Center in the southwest of AhvazThe main factor of planting date was August 1, 10 and 20 and the sub-factor of hybrids SIMON, PL712, K.S.C703 and K.S.C704 (control),were evaluated in three replications. The results of analysis of variance showed the effect of sowing date on number of rows per ear, number of seeds per row, number of seeds per ear, 1000-seed weight, ear length, plant height, ear length, grain yield, harvest index, re-transfer rate, efficiency Remittance, current photosynthesis rate, current photosynthesis efficiency, remittance share and current photosynthesis share were significant. There was a statistically significant difference between the studied hybrids in number of seeds per ear row, 1000-seed weight, ear length, plant height, seed yield and harvest index. The results showed that PL712 cultivar had the highest yield of 9294.217 kg on the 20th of July. With a delay in the planting date and the encounter of the pollination period with more favorable climatic conditions, Among the hybrids studied, Performance traits and performance components increased.