Compare diurnal variation of net photosynthetic rate of treatment B to that of check at 12:00, Sep.2, 2003, far more was increased, the increasing rate was 24.35%;

• 光合速率的日变化在12:00时B处理要远远大于对照；增加比例为24.；35%25; 穗位叶蒸腾速率B处理明显大于对照；2003年各坡度平均增加282