At present, it is at the peak of the pollination of Qiuyu watermelon in the areas of Linyi District of Changle City, Qingzhou City and Zibo City. Whether this period is managed properly or not is directly related to the level of watermelon yield and quality. The reporter believes that the following points must be carefully grasped in production:
First of all, time must be good. In particular, it is necessary to pollinate early after the cloudy days and the pollination time must be concentrated. Because of the lack of pollinating insects in the shed, watermelon fruit set usually requires artificial pollination, and the pollination period is relatively concentrated. In general, when the weather turns fine, the Corolla usually begins to loosen around 5am and pollen begins to crack at about 6am. Pollen is sprinkled and the corolla spreads out. At noon, the color of the corolla faded and began to close. From 8 to 10 am, it is the time when the stigma of female stigma and male pollen is most active. Therefore, it is the best time for artificial pollination at this time. In general, the completion time of artificial pollination of watermelon is 7 days, so that watermelon is concentrated in the fruit setting period, the management is convenient, the collection period is also concentrated, and the fruit size is uniform and the yield is high. If the pollination completion time exceeds 10 days, the melons are not neat and grow slowly, affecting the yield. In order to ensure pollination is completed within the appropriate pollination time, it is necessary to pay close attention to the employment of some people for pollination, and strive to end pollination by 11:00 a.m.
Second, pay attention to temperature management before and after pollination. The temperature for melon flowering is 25-32 degrees Celsius. If the temperature is higher than 32 degrees Celsius, the activity of watermelon pollen will decrease rapidly. After pollination, pollen tube development and completion of fertilization also require certain conditions. At this time, the temperature should not be too high. Therefore, during pollination, the temperature requirements in the shed are more stringent. It is best not to exceed 30 degrees Celsius during the day and not less than 15 degrees Celsius at night. This will be more conducive to pollination, sitting in the melon, increase the rate of sitting and reduce malformation. If the temperature in the shed reaches 30 degrees Celsius, timely ventilation will reduce the temperature inside the shed.
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