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近年来杂交稻的种植面积不断扩大,产量显著提高,并已成为提高水稻产量的一项重要措施。但由于杂交稻生育后期的抗寒性较差,适温幅度较窄,以及人们对低温危害其结实的规律性认识不足,未能采取积极有效的防御措施,在社、队和年际之间尤以晚季栽培的产量不稳定。连续几年来在参加“全区水稻两寒协作试验”的基础上,79年参加“全国杂交稻结实的低温冷害指标及其随纬度和高度的变化规律的探讨“联合试验,探索低温危害杂交晚稻结实的一些生理原因,鉴定低温危害结实的指标,为充分发挥杂交稻的增产潜力,合理利用有利的气候资源,进行防御和农业气象服务方面提供依据。
In recent years, the area under cultivation of hybrid rice has been continuously expanding, the yield has been significantly increased, and it has become an important measure to increase the yield of rice. However, due to the poor cold resistance and narrow temperate range of hybrid rice during late growth stage, as well as the lack of understanding of the regularity of low-temperature endangering its robustness, it failed to take active and effective defensive measures. Between the community, team and interannual Especially in late-season cultivation of unstable output. For several years, on the basis of participating in the experiment of “two cold co-operation of paddy in the whole region”, we participated in the joint experiment of “low temperature chilling injury index of hybrid rice in China and its variation with latitude and altitude” in 79 years to explore the hybrid rice with low temperature damage For some physiological reasons, to identify low temperature damage endangering indicators, to give full play to the yield potential of hybrid rice, rational use of favorable climatic resources, to provide the basis for defense and agrometeorological services.