( 5 ) varying trend of leaf water potential differs in different seasons . leaf water potential changes significantly with temperature . the speed of leaf water potential rising with temperature in heavy saline is faster than that of in light saline （ 5 ）油葵叶水势各生育阶段变化趋势不同，随温度变化显著，多数阶段叶水势都随温度升降呈现相同变化，含盐高的小区叶水势升降速度高于低含盐区叶水势低于低含盐区，可以反映土壤水分胁迫和盐分胁迫。
