1. Sowing date and variety are selected from batches from early February to late April, live or transplanted, and seedlings (commonly known as chicken or cabbage) are listed. Seeding should be selected before the end of March, such as late-maturing varieties, such as slow in April. Sowing after the end of March, more varieties of early maturity, such as high-foot white, short-foot white, etc., 1.2 to 1.5 kg per acre.
2. Selecting the ground should choose no loose waste soil, no excessive pesticide residues and toxic heavy metal loose soil, adopting narrow and deep ditch cultivation, the width of the raft is 1.5 meters, and the surface is required to be flat. Apply more ash and soil to improve soil temperature.
3. Seeding and planting spring cabbage is mostly listed on seedlings and partially colonized. After sowing, apply 40% to 50% of manure and manure, and then decide to water according to the weather and dry and wet conditions. When planting seedlings, the seedling age is 15 to 25 days, the row spacing is 16 cm, and the plant spacing is 6 to 10 cm. More intercropping with melons and legumes.
4. The cultivating and topdressing springs are rainy and the soil is easy to be knotted. The drainage should be cleared in time to prevent the soil area and reduce the groundwater level. For transplanting seedlings, timely shallow cultivating should be carried out to remove weeds in the field. After colonization, the manure is applied once every 3 to 4 days. Dry soil on sunny days, the number of top dressing should be diligent, the concentration should be small; after the rain, the soil is wet, the number of top dressing should be reduced, and the concentration can be appropriately increased. Before the seedlings are released, it is only necessary to select 1~2 times of mature manure from the sunny day after emergence. Pay attention to stop applying manure water more than 7 days before harvesting, and change the water or apply a small amount of urea or ammonium bicarbonate depending on the weather and lack of fertilizer.
5. Cultivation of spring cabbage in greenhouses can be made between melons and legumes in greenhouses. It can keep warm and avoid frost or avoid cold, which is beneficial to shorten the growth period, improve the morning market and improve quality.
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