The apportionment of water supply among growth stages had a big impact on the SOD activity, showing the highest sensitivity of A. truncatum to soil water stress at the early growth stage.

• 在土壤供水能力基本相同时，不同生长阶段供水量的分配汁元宝枫幼树SOD活性有较大影响。综合分析表明，生长前期供水与SOD活性呈正相关，生长后期和生长中期供水量与SOD活性呈负相关。