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1994年10月至1995年2月,我市出现了历史罕见的持续高温,小麦拔节期显著提前,10月15～25日播种小麦,翌年元月上旬至2月上中旬相继进入拔节期,比常年安全拔节期提早1个月以上,抗寒性明显下降,冬春四次寒潮,致使大面积小麦在不同时段造成严重冻害死穗,主茎幼穗平均冻死56.4％。据此,我们采用大面积调查与定位试验相结合方法,进行系统研究,探明了受冻小麦的生育特点,提出了综防补救技术。
From October 1994 to February 1995, there was a rare and sustained high temperature in our city. The wheat jointed stage was significantly advanced. Wheat was sowed from October 15 to 25, and jointed jointing stage from early January to next January, The perennial annual jointing stage was more than one month earlier, and the cold resistance decreased obviously. Four cold spells in winter and spring resulted in severe frostbite and dead spike in large area wheat at different time periods. The average frostbite death of main stems was 56.4%. Accordingly, we use a large area survey and positioning test combination of methods to conduct a systematic study to identify the characteristics of the bearing of frozen wheat, put forward a comprehensive anti-remedial technology.