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张家口埧下地区,地势較高,气溫較低,冬春季干旱多风,海拔500—950米,年平均气溫4—10℃,日平均气温在零下的天数計120天左右,最低气溫零下23—35℃,无霜期150多天,是一年一作的杂粮区。 一九五八年大量引种碧螞1号小麦,四年来,大部分地区越冬死亡严重,播种面积逐年縮小。但据几年試验和調查,越冬死亡的主要原因是品种抗寒性差。为了扩展北部新冬麦区的冬麦面积,解决冻害的問題和选育抗寒品种,乃于一九六二年度与
Zhangjiakou Qiongxia area, high ground, the temperature is low, winter and spring arid windy, elevation 500-950 meters, the annual average temperature of 4-10 ℃, the average daily temperature below zero in days counted 120 days, the minimum temperature Minus 23-35 ℃, frost-free period of 150 days, is a year for the miscellaneous grains area. In 1958 a large number of introduced Bi Ma 1 wheat, four years, most areas overwinter death serious, sown area has been reduced year by year. However, according to several years of tests and surveys, the main cause of overwintering death is the poor cold tolerance of varieties. In order to expand the area of winter wheat in the new winter wheat area in the north, to solve the problem of frost damage and to breed cold-resistant varieties,