夏玉米水分胁迫判别指标的研究

A Study on Diagnostic Indexes of Soil Water Stress of Summer Maize

通过定点实验 ,研究了夏玉米不同水分胁迫条件下叶水势、冠层温度的变化特征 ,结果表明 ,土壤水分胁迫使夏玉米的叶水势降低 ,冠层温度升高 ,冠气温差增大。通过与良好供水的田块对照表明 ,叶水势和冠层温度可以作为作物水分胁迫的判别指标。

The field experiments on the characters of leaf water potential and canopy temperature of summer maize were conducted. Due to the soil water stress the leaf water potential decreased, the canopy temperature increased and the differences between canopy temperature and atmospheric temperature enlarged. Compared with the croplands, which were supplied with sufficient water, the leaf water potential and canopy temperature could be used as the diagnostic index for the soil water stress of summer maize.