The experimental results showed that chlorophyll content and photosynthetic rate of irrigated sugarbeet seedlings were increased under the drouthy springtime, especially high photosynthesis of leaf was kept during growth anaphase.

• 摘要春季干旱条件下，苗期灌溉处理可以提高甜菜叶片叶绿素含量和光合速率，尤其对于生育后期保持叶片较高的光合能力有明显作用。