The results of the seedling experiments in phytotron and light growth incubator showed that relative conductivity of Zaoyou No.1 was the lowest and The Pn of Zaoyou No.1 was tiptop in heat-tolerance.

• 苗期耐高温试验结果农明：高温胁迫条件下，早优－号相对电导率最低，净光合速率最高，囚而比较耐热。