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采用大田试验研究了强降雨致洪涝灾害条件下不同品种水稻发生倒伏的差异,及施肥和栽培密度对淹水后水稻倒伏的影响,以期为洪涝灾害条件下防治水稻倒伏提供依据,同时丰富水稻抗倒栽培的研究内容。结果表明,所试18个水稻品种中只有4个未发生倒伏,其中1个为常规稻,3个为杂交稻,水稻耐涝抗倒性与水稻品种的类型无明显相关性。淹水后不施肥处理水稻基本无倒伏现象发生,施肥处理水稻的倒伏率则显著增加,灌浆期平均倒伏率为26.7%,成熟期平均倒伏率为61.1%。洪涝灾害条件下,密植增加了水稻的倒伏。研究结果为了解淹水条件下的水稻倒伏提供了参考依据,实际生产中应强调良法与品种的特性相结合。
Field trials were conducted to study the differences in rice lodging under different rainfall-induced flooding conditions and the effects of fertilization and planting density on the rice lodging after flooding, in order to provide a basis for preventing and controlling rice lodging under flood conditions and to enrich rice resistance Inverted cultivation research content. The results showed that only 4 out of 18 rice cultivars were not lodging. Among them, 1 was conventional rice and 3 was hybrid rice. There was no significant correlation between waterlogging resistance and rice type. After flooding, the basic no-lodging phenomenon of rice without fertilization occurred. The lodging rate of fertilized rice increased significantly. The average lodging rate at grain filling stage was 26.7% and the average lodging rate at maturity was 61.1%. Under flood and flood conditions, close planting increases the lodging of rice. The results provide a reference for understanding the lodging of rice under flooding conditions, and the actual production should emphasize the combination of good law and variety characteristics.