How to Plant Early Spring Watermelons in a Greenhouse
The editor will tell you about the topic of planting early spring watermelons in a greenhouse and the management techniques of flowers and plants, followed by detailed content sharing.
Watermelons are native to the African region and are a type of tropical fruit. They are widely cultivated in China, which is known as the world's largest watermelon producing area. Watermelons prefer a warm and dry growing environment and are not cold-tolerant. The temperature required for the development of the root system is about 24°C-30°C. It is important to pay attention to the supply of water and nutrients during the planting process. Next, let's understand the management techniques of early spring watermelons in a greenhouse from aspects such as grafting strong seedlings, timely planting, careful management, fruit management, and disease prevention and treatment.
1. Grafting Strong Seedlings
Using grafting technology can not only effectively prevent and control the wilt disease of watermelons during growth but also significantly improve the survival rate of watermelons, ensuring the quality and yield of the later fruits. Generally, "upturning seedlings" should be carried out before grafting and planting, starting from the 3rd to 4th leaves of the watermelon seedlings, which can increase the adaptability of the watermelon seeds.
2. Timely Planting
When planting, attention should be paid to weather changes to ensure that there are 3-5 days of sunny weather after planting, which is conducive to seedling recovery. The greenhouse should be covered 15-20 days before planting. When planting, water should be poured into the holes first, and the depth should be 2 centimeters higher than the ground.
3. Management After Planting
Within three days after planting, ensure that the temperature in the greenhouse is between 30°C-35°C, which is beneficial for seedling recovery. Watering should be done about one week after planting. Keep the temperature at 20°C-28°C during the growth period of the watermelons, with a nighttime temperature of 15°C-20°C. After the vines grow, spray methyl thiophanate or metalaxyl-manganese zinc solution once.
4. Fruit Management
When the main vine of the watermelon reaches 20 nodes, artificial pollination should begin, usually before noon. Remove the male flowers and separate the petals, then evenly apply the pollen to the stigma of the female flowers. When the young fruit is the size of an egg, start thinning the fruit. During this period, control the amount of watering and maintain the greenhouse temperature. Water should be poured about 20-25 days after pollination.
5. Disease Prevention and Treatment
When the leaves of the watermelon turn yellow or the growth is not good, it is necessary to check if there are any diseases or pests. If there are, timely treatment is needed to avoid low yield or death. When sudden collapse disease occurs, spray 600 times the concentration of 75% chlorothalonil wettable powder solution. When anthracnose occurs, promptly remove the infected leaves and then spray an appropriate amount of 800 times the concentration of 75% chlorothalonil wettable powder solution.
The above introduction on how to plant early spring watermelons in a greenhouse and the management techniques of early spring watermelons in a greenhouse are for everyone to learn and understand!