1986年5月3日青冈县出现罕见的高温,最高气温达27.1～31.1℃,而5月7日气温骤降,8～12日最低气温为-1.5～-2.9℃,最低地温为-1.8～-7.4℃。此次降温持续时间长、强度大,给已出苗的玉米造成严重冻害。为今后制定防御冻害措施和完善玉米栽培措施,我们在青冈县新合村进行了调查、试验与分析。 On May 3, 1986, there was a rare high temperature in Qinggang County, with the highest temperature reaching 27.1-31.1 ℃. On May 7, the temperature plummeted. The lowest temperature was from -1.5 to -2.9 ℃ on 8-12 and the lowest ground temperature was -1.8 ~ -7.4 ° C. The long duration of cooling, strength, to the corn has caused serious frost damage. In order to formulate defensive frost damage measures and improve maize cultivation measures in the future, we conducted a survey, trial and analysis in Xinhe Village, Qinggang County.