上海郊区种植的晚熟花菜,在露地繁殖期间,特别是开花结荚期往往遇到连续阴雨,花枝容易腐烂折倒,造成种子欠收。如1983年4月中旬至6月下旬,总降雨量比常年同期增加了59%,其中6月份的雨量比常年同期增加了一倍。当年本市及周围地区的晚熟花菜种子大幅度歉收,造成花菜种子紧缺。但在温室、中型塑料薄膜棚内采种的早熟及部分中熟品种,由于不被雨淋,收量尚好。如原严轿 Late-maturing cauliflower plants planted in the suburbs of Shanghai often experience continuous overcast and rainy days during flowering, especially during flowering and podding. For example, from mid-April to late June 1983, total rainfall increased by 59% over the same period of previous year, with rainfall in June doubled from a year earlier. At that time, late-blooming cauliflower seeds in the city and the surrounding areas suffered a serious failure, resulting in a shortage of cauliflower seeds. However, in the greenhouse, medium-sized plastic film shed in the early maturing and some medium-maturing varieties, as not being rain, the yield is still good. As the original Yan car