论文部分内容阅读
每年9月中下旬的长江流域双季稻产区,由于受北方南下冷空气影响,使正处于抽穗扬花期的晚稻遭受危害,造成生殖生长受阻,包颈严重,开花不畅,扬花授粉不能正常进行,空壳率增加,千粒重减轻,产量降低。双季晚稻特别是杂交晚稻空壳率的高低,直接受抽穗扬花期间温度高低的制约,它正常抽穗扬花灌浆的最低临界
Due to the influence of the cold air in the south of the north, the late rice in the mid-to-late September of each year in the Yangtze River valley of the Yangtze River basin is harmed by the cold air in the south of the north, which hinders the growth of reproductive growth, severely packs neck, poor flowering and pollination of flowering flowers The shell rate was increased, the grain weight was reduced and the yield was reduced. The double-late late rice, especially the hybrid late rice shell height ratio, is directly affected by the temperature during flowering and flowering constraints, it is the normal heading flowering grouting minimum threshold