杂交中稻头季稻花期阴雨下产量与再生稻产量的关系

摘要

In order to determine the remedial function of ratooning rice for rain disaster,20 approved middle -season hy-brid rice varieties were used to study the main crop rice yield under continuous overcast and raining during flowering stage and its relation with yield of ratooning rice under nitrogen application or no nitrogen application.The results showed that there were significant difference between the yields of main crop and ratooning crop with or without nitrogen application. There was significantly negative correlation between the yields of main crop rice and ratooning rice.The yields of main crop and ratooning rice were significantly increased by nitrogen application.The varieties with higher yield under no nitrogen application were more increased under nitrogen application.The yield of ratooning rice can serve as the supplement of the main crop rice in continuous overcast and raining days during flowering stage.This study provided the theoretical basis and technical support for the anti reverse technology of middle -season hybrid rice and ratooning rice.%为探明蓄留再生稻对水稻抽穗开花期遭遇阴雨灾害的补救作用，以20个通过审定的杂交中稻品种为材料，在头季稻抽穗开花期遇连续阴雨情况下，研究施氮和不施氮条件下头季稻产量与再生稻产量间的关系。结果表明：在施氮与不施氮条件下，不同水稻品种头季稻产量和再生稻产量均存在极显著差异；杂交中稻品种间再生稻产量与头季稻产量均呈极显著负相关；施氮后头季稻产量和再生稻产量均显著提高，而且在不施氮条件下产量高的品种，其在施氮后产量提高程度更大。再生稻产量可作为头季稻抽穗开花期受阴雨天气影响所致减产的产量补充，为水稻（中稻＋再生稻）抗逆减损提供理论依据和技术支持。