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苏玉糯 1号全年播期试验的结果指出 :平均温度与产量呈极显著的曲线回归关系 ,上半年全生育期平均温度 18℃ ,下半年吐丝收割历期平均温度 2 1.5℃ ,分别为春、秋玉米的产量高峰温度值 ;连续数日≥ 35℃的极端高温天气对正处于抽雄、吐丝阶段的玉米产量和品质影响极大 ,灌浆期遇到平均温度持续 <15℃的低温天气则不能达到正常收获标准。因此 ,在湖州地区 5月 2 6～ 6月2 7日为产量低值播种期 ,5月 2 1～ 6月 19日为不安全播种期 ,秋播最迟极限为 8月 3日 ,全年适宜播期为 2月 2 0日～ 5月 2 0日和 6月 2 8日～ 8月 3日 ,其中春玉米 3月 10日～ 15日、秋玉米 7月 15日～ 2 0日为最适播期
The results of Soybean No.1 sowing date showed that the average temperature and the yield showed a very significant curve regression. The average temperature in the first half of the whole growth period was 18 ℃, and the average temperature in the second half of the silking harvesting period was respectively 2.1.5 ℃ Is the peak and peak temperature of spring and autumn maize. The extremely hot weather ≥ 35 ℃ for several days has a great impact on the yield and quality of maize at the stage of tasseling and silking. During the filling stage, the average temperature is lower than 15 ℃ The weather can not meet the normal harvesting standards. Therefore, in Huzhou area from May 26 to June 27 low yield sowing period, May 21 ~ June 19 unsafe sowing time, autumn sowing the latest limit of August 3, the whole year The suitable sowing date is from February 20 to May 20 and from June 28 to August 3, of which the spring maize is the most from March 10 to 15 and the autumn maize from July 15 to February 20 Suitable sowing period