YIELD AND QUALITY OF SOME MAIZE HYBRIDS (Zea mays L.) UNDER DIFFERENT PLANTING DATES

For optimal maize yield, selecting the appropriate planting date based on a region's climatic conditions is crucial. This is especially true when considering the varying needs of different maize hybrids. To better understand the relationship between planting dates and yield for various maize hybrids, a study was conducted in Jiroft during 2018 and 2019. This research examined ten maize hybrids across three distinct planting dates.The findings revealed that delaying the planting date reduced yield components, SPAD, GDD, oil percentage, and overall oil yield.Interestingly, the amino acid content increased with delayed planting. Among the hybrids, the 703 variant achieved its peak grain yield on July 18. In contrast, the lowest yield was recorded on August 1, marking a substantial 30.07% reduction in grain yield. These results underscore the significance of timely planting in maximizing both the yield and quality attributes of maize hybrids.