I. Cultivation period: the winter small arch shed period can be from october to early november。
Intensity of seedlings and seedlings: cultivation density of cabbage seedlings in winter is generally between 1,000 and 1,500 plants per square metre, with an acreage of about 2 to 3 kg. The cabbage requires 10-15 square metres of seedbed per acre of field。
Iii. Preparation of seedbeds: selection of fertile soil, protection from the wind to the sun, and creation of suitable seedbeds adapted to local conditions. The average bed size is suitable at 1. 2-1. 5 m, with a . 5-0. 8 m wide ditch being dug between the bed and the bed levelled。
The small arch sheds are constructed: they are usually 1. 2-1. 5 metres wide, with an altitude of 0. 8-1 metres and an arch shed space of approximately 0. 5 metres. The mackerel is used for arches ranging from 1 to 1. 2 metres, and the bamboo blade is inserted at the same altitude as the bamboo blade from the ground, which is appropriate for the maximum distance from the ground at 0. 9-1 metres。
V. The method of seeding: before seeding, the seedbed shall be filled with sufficient water, until the water is dried up, then the seed shall be sowed with fine soil or sand, then covered with approximately 0. 5 cm of fine soil, then taped with bamboo, covered with film, and sealed with dirt. Be careful to tighten, press and hold the membrane to both ends and sides while preventing the wind from breaking。
Seed seedling management: normally three to five days before seeding occurs, with timely ventilation after seeding, timely watering in the event of drought, wetting of bed surfaces, and protection against weeds and pests in a timely manner, with appropriate shade if the sun is too strong after seeding. If the leaves are found to be yellow and green, 0. 2 per cent of potassium phosphate can be sprayed in the clear sky in pursuit of fertilizer. Pre-planting standards are met. When winter temperatures are low, no ventilation is required to prevent or mitigate freezing in the event of cold temperatures
