2. Sowing: Sowing in March in the south, April in the north, and early May in the cold area of Northeast China is appropriate. The row spacing is 70cm and the spacing between plants is 50cm. When potted, only 1 plant is left in each pot. The south can be broadcast directly in the open air, and the north is best to raise seedlings and transplant them in the protected area 1 month in advance.
3. Seedling transplanting: Apply the cooked farmyard manure into the seedbed, carefully dig it flat and water it. When sowing, the plant spacing is 8 cm. After sowing, cover the seeds with fine sand with the thickness of 1 cm, and make plastic arch shed on the seedbed for heat preservation and seedling raising.
Keeping the temperature in the border at 25 ~ 30℃ during the day and not lower than 65438 05℃ at night, seedlings can emerge in 5 days. After all the seedlings come out, open the shed at 9: 00 a.m. 9:00- 10/0 on sunny days to cool the air, and water less at the seedling stage to avoid lowering the temperature of the seedbed. The seedlings grow to three true leaves, and after a week without frost, choose sunny days to sow. Each seedling is watered with a big bowl of water, and the nest is sealed with fine soil after the water permeates. Try not to flood irrigation after planting, so as not to reduce the ground temperature and affect the growth of seedlings.
4. Management: Temperature has a great influence on the growth of seedlings. In case of low temperature in the north, plastic arch shed should be covered in time to keep warm. When the temperature is lower than 10℃ for a long time, there are few or no male flowers on melon seedlings; Long-term higher than 35℃ or too dry; There are few or no female flowers on the seedlings. There are few insects in early spring, so the first few female flowers should be artificially pollinated with clean brushes in sunny mornings. When large-scale plastic arch shed is cultivated, it is best to put bees in the shed to assist pollination.
5, fertilization: farmyard manure is better than cooked human livestock manure, when a small amount of potted plants are indoors; It is also ok to eat leftover steamed bread or discarded meat residue. Dig a nest and bury it at the place 10 ~ 15cm away from the root, and pay attention to a small amount for many times. The amount of fertilization should be appropriately increased in the fruiting period.
6, pest control: papaya stems and leaves have long and hard hair, pests are not easy to approach. Occasionally, aphids or cabbage caterpillars harm the leaves, and pesticide such as dichlorvos or mirex is used to spray the leaf water 1: 1000 times. When potted or cultivated in a small amount, cigarette butts can be soaked in tobacco water and sprayed with insect leaves.