鲜食玉米苏玉糯1号全年播期试验研究

Study on planting date of vegetable corn Suynuo 1 for all the year round:

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

The study of the planting date of vegetable corn (Suyunuo 1) for all the year round showed that the curve regression of the average temperature to the yielding was extremely significant.To achieve the highest yield,18℃ was discovered the best temperature during the whole growing period for the spring vegetable corn in the first half year,and 21.5℃ was disovered the best average temperature from the sprouting thrum to harvesting for autumn vegetable corn in the next half of the yeat.And if the highest temperature of continual days was above 35℃ during the sprouting stamen and thrum of corn,the yielding and quality would be reduced significantly,and the average temprature below 15℃ during grain filling period brought abnormal harvesting. So,in Huzhou,the planting dates from 26 May to 27 June got low yielding of vegetable corn.The suitable planting dates were from 20 Feb.to 20 May and from 28 June to 3 Aug.,during which the optimum planting dates were from 10 Mar.to 15 Mar.for the spring vegetable corn and from 15 July to 20 July for the autumn vegetable corn.