摘要
通过对典型霜冻年资料统计分析发现 :2 0世纪 90年代冬暖年是 80年代的 2倍 ,晚霜冻的发生频率是80年代的 1.88倍。冬季温暖、初春气温回升快、小麦拔节提前的年份 ,晚霜冻发生频率在 66.7%以上。适时播种 ,及灌水、烟熏、覆盖 。
with the data of typical late frost injury years, conclusion can be draw that in the past 10years the years winter tending warm is twice as 1980's and the frequency of late frost injury occurs is about 1.88 times than 1980's.when the winter warms, temperature becomes increase quickly in spring and wheat joints up earlier, the frequency that late frost injury happens is about 66.7%.
出处
《河南气象》
2002年第4期40-41,共2页
Meteorology Journal of Henan
