1. Seedling management
Strengthen management according to the growth characteristics of different watermelon varieties. Varieties with weak growth potential at the seedling stage, such as Yuyi 926 and Zaokang No. 2 watermelon, etc., must be applied with organic fertilizer and timely foliar top dressing; varieties with strong growth potential at the seedling stage, such as Taiwan Heibao and Yuyi 2000 The amount of nitrogen fertilizer at the seedling stage should be reduced. When applying the bottom fertilizer, the amount of nitrogen fertilizer should be reduced as much as possible. Instead, apply nitrogen fertilizer after sitting on the melon, and control the watermelon seedlings to increase the rate of sitting melon by proper water control.
2. Coordinate vegetative and reproductive growth
The watermelon flowering and sitting stage is a transition period from the transformation of vegetative growth to reproductive growth. Therefore, different measures should be taken in management to restrain the strong and weak. If the watermelon plant is overgrowing, the amount of nitrogen fertilizer should be reduced. After the extension of the vine to the second female flower, no more nitrogen fertilizer should be applied. At the same time, the amount of water should be reduced. Strict pruning and branching should be strict, strengthen management, and promote the shift of growth focus from vegetative growth to reproductive growth.
If there is a phenomenon of crazy seedlings, the branches should be trimmed in time to prevent the branches from overlapping, to ensure field ventilation and light transmission, and to control the growth of stems and leaves by pressing the vines, spraining the tops of the vines, curved vines, and inserting bamboo sticks into the roots of melon seedlings , To promote the distribution of nutrients to young melons. It can also be treated with ketamine immediately when there are signs of leggy, to control madness.
For watermelon plants with weak growth and small and small melons, top dressing should be done in time. Method: Open a hole for top dressing at 15-20 cm from the root of the watermelon plant, and use 1:10 fermented cake fertilizer water It can also be foliar sprayed Jian Zhi Bao, plant nutrition treasure or Chong Shi potassium fertilizer to enhance plant growth and promote flowering.
3. Conduct artificial auxiliary pollination to improve the sitting rate
During the opening of the second and third female flowers of the main watermelon, pick the blooming male flowers in the morning on a sunny day, peel off the petals, pinch the stalks and gently apply the pollen to the stigmas of the female flowers. All covered with pollen. In case of rain, you can wrap the female and male flowers that are open the next day in a paper bag the day before flowering. Remove the paper bag for artificial pollination when flowering the next day. If it rains 3 hours after artificial pollination, it needs to be supplemented.
4. Timely prevention of diseases and insects
Aphids and red spiders harm watermelon fields with serious damage, and the rate of sitting melons is obviously reduced.
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