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采用人工授粉研究了瓠瓜杂种一代的制种种术，结果表明：每株瓠瓜上以选留３个种瓜，在上午８∶００前后进行人工授粉，所生产的杂种一代种子产量最高，质量最好。
The results showed that three kinds of melon seeds were selected on each cucumber and artificial pollination was carried out around 8:00 am. The yield of the hybrid seed was the highest, the quality the best.