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针对我县地处川东地区,3月中旬低温寒潮频繁,杂交水稻制种父本播种难以提早,而7月下旬阴雨天气频率较大、伏旱较多,严重影响母本异交结实的气候特点。1990年我县杂交水稻制种试行了一期父本地膜增温育秧,取得良好效果。86亩 D 优63制种田平均亩产215.8公斤,比常规的两期父本露地育秧亩产171.7公斤增产25.7%。它具有以下四方面优点:
For my county is located in eastern Sichuan region, mid-March cold and frequent cold, hybrid rice seedparent sowing is difficult to early, but in late July, more frequent rainy weather, more drought, severely affected the male parent of the climatic characteristics of the climatic . In 1990, a trial of hybrid rice seed production was conducted in our county to increase the seedling temperature and achieve good results. The average yield per mu of 215 mu of 86 mu D 63 farming system is 215.8 kilograms, which is 171.7 kilograms more than that of the conventional two parent sowing and transplanting rice varieties, an increase of 25.7%. It has the following four advantages: