不同玉米品种萌芽期及苗期抗旱性初步研究

Studies on Drought Resistance of the Different Hybrid in Seedling Emergence Stage and in Seedling Stage

对4个玉米杂交种辽单35、丹玉24、沈丹16、沈农87进行萌芽期和苗期的抗旱性研究。结果表明,不同杂交种在抗旱性上存在明显差异,在水分胁迫下,抗旱性强的杂交种仍然保持较高的发芽势和发芽率,苗期叶片气孔导度、蒸腾速率、光合速率下降的幅度较小。

The study on drought resistance of four hybrids in seedling emergence stage and in seedling stage showed that there were obvious drought resistance differences among the hybrids. The higher drought resistance hybrids kept high viability and percentage of germination, photosynthetic rate and transpire rate under water stress while the lower drought resistance hybrids were decreased seriously. The results showed that evaluation based on these indexes could reflect the drought resistance traits of maize in seedling emergence stage and seedling stage.