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小麦的抗寒性是指对低温的忍耐性。冬小麦一般能忍受零下15—20℃的低温。我省中北部晚熟冬麦区一月份平均气温为零下4—8℃,绝对最低气温零下20—30℃。中南部中熟冬麦区一月份平均气温为0—3℃,绝对最低气温零下15—20℃。所以在一般年份,中南部小麦可安全越冬,而北部则常常发生冻害。据坝县农科所调查:在冬春气温稳定的8年中,小麦越冬死苗率6.6—10.1%。
Cold hardiness of wheat is tolerance to low temperature. Winter wheat generally tolerates temperatures down to minus 15-20 ° C. The average temperature of late winter ripe winter wheat in central and northern part of our province is minus 4-8 ℃ in January, and the absolute minimum temperature is minus 20-30 ℃. In mid-southern mid-maturing winter wheat district in January the average temperature of 0-3 ℃, the absolute minimum temperature minus 15-20 ℃. Therefore, in general years, wheat in central and southern China can winter safely, while frost damage frequently occurs in northern China. According to the dam County Agricultural Investigation: winter and spring temperatures stable in the past 8 years, winter wheat seedling rate of 6.6-10.1%.