Season and time of open field nursery: Open field nursery can be carried out during the annual frost period, but mainly in early summer and summer and autumn.
Suitable vegetable types for open field breeding: including tomato, eggplant and cucumber cultivated in summer and autumn; Chinese cabbage, cabbage, broccoli, celery, lettuce, lettuce, onion, and leeks cultivated in autumn.
Seeding methods for open seedlings: leafy vegetables such as Chinese cabbage, kale, lettuce, celery, and lettuce are mainly spread. Solanum vegetables are spread or broadcast. Melons, beans such as cucumber, melon, melon, cowpea, etc. are generally used to point (point) broadcast. Spring open field seedlings should be planted after a sunny day (or warm weather after a cold current). Do not plant before heavy rain or during the cold wave.
Seedling age of open field nursery: The seedling age of open field is generally shorter, and the shorter seedling age is beneficial to seedlings and seedlings. Reference seedling age: rapeseed, cabbage 25--30 days, cabbage 19 days, cabbage 40 days, celery 60 days, melons within 20 days, solanes less than 40 days.
Intercropping and seedlings of open field nursery: usually in the presence of the first true leaf and 2 - 3 true leaves, each seedling is once, generally the seedling age is short, and the seedling age should be divided into 1 seedling. In case the seedlings are long. When seedlings are planted, it should be shallow and not deep.
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