杂交水稻制种最佳期的确定

针对杂交水稻制种对晴、雨天气敏感反应，根据建阳市（１９６１－１９９６年）降水资料，分析降水分布规律，采用历年６－９月逐日、各候连阴雨天气概率分布规律和连续１０天内遇阴雨天概率分布谷期，确定闽北地区杂交水稻制种的最佳期。

The Settle of the Best Period in Hybrid Rice Breeding

In view of the male and female rice being sensitive to the clear and rainy weather in hybrid rice breeding , the continuous overcast or rainy weather that lasting 3 days or more is studied in terms of probability distribution by using the rainfall data ( 1 9 6 1 - 1 9 9 6 ) of Jianyang city. And the probability of occurance of overcast or rainy weather mentioned above during a period of ten days is also studied similarly The best period of hybrid rice breeding in Northern Fujian is then settled .