黑河市属寒地稻作栽培区，经常出现低温冷害和早霜，对感温性强的水稻影响很大。该市水稻生产每年都有不同程度的低温冷害，而且大体上每隔三四年就出现一次周期性严重的低温，水稻易于贪青晚熟遭到减产。因此必须树立抗灾夺丰收的思想，各项增产措施都要立足于早熟高产。为保 Heihe City, a cold paddy cultivation area, often cold damage and early frost, a strong sense of temperature sensitive rice. Rice production in the city has varying degrees of chilling injury every year, and in general there is a cyclical low temperature every 3-4 years. Rice is liable to be cut off from late-blooming and late-maturing conditions. Therefore, we must establish a disaster-ridden harvest idea, and all stimulation measures must be based on early maturity and high yield. To protect