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高纬寒地是指种稻的纬度高(北纬50°以上),水稻生育期的月平均温度为16～21℃之间,总积温在1900～2100℃,属于黑龙江省北部寒冷种稻区。本区栽培水稻特点多为手撒直播法,管理粗放,草荒较重,有的年份因低温冷害的影响,稻的产量不高。为提高插秧效率和经济效益,1986年在黑龙江
High latitude refers to the high latitudes of rice latitude (latitude more than 50 °), the average growth temperature of rice during the period of between 16 ~ 21 ℃, the total accumulated temperature 1900 ~ 2100 ℃, belonging to northern Heilongjiang Province cold rice region. The characteristics of cultivated rice in this area are mostly hand-and-seed broadcast method, extensive management and heavy grassland waste. In some years, the yield of rice is not high due to the effects of chilling injury. To improve the efficiency and economic efficiency of transplanting, in 1986 in Heilongjiang