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以32个杂交水稻组合的种子为材料,研究了淹水时间对这些组合萌发状态种子出苗情况的影响。结果发现,淹水时间在24~72小时,各组合种子的出苗率和正常苗率都基本稳定,淹水超过72小时后,所有组合正常苗率都急剧下降;淹水108小时后,32个组合的平均正常苗率降至12.5%,其中只有2个组合在30%以上,有16个组合低于10%。可见,对于萌发状态的杂交水稻种子,淹水在72小时内,出苗率和正常苗率一般不会受到明显的影响,但此后随
Using the seeds of 32 hybrid rice combinations as materials, the effect of flooding time on seedling emergence of these combinations was studied. The results showed that the flooding time ranged from 24 to 72 hours. The seed germination rate and normal seedling rate of all the combinations were basically stable. After 72 hours of flooding, the normal seedling rate of all the combinations dropped sharply. After 108 hours of flooding, 32 The average normal shoot rate of the combination dropped to 12.5%, of which only 2 combined at 30% and 16 combined at less than 10%. It can be seen that for the hybrid rice seed germinated in the state of flooding within 72 hours, the emergence rate and the normal seedling rate generally will not be significantly affected, but then with