Spring cabbage has strong adaptability, easy cultivation and early marketing. It plays an important role in the supply of early spring vegetables. In order to fight for early maturity and high yield, the use of arch shed covering measures should be focused on the following techniques.
First, select excellent varieties
It is suitable for early-maturing varieties suitable for close planting. It is strong in cold resistance, firm in ball, good in quality and difficult to twitch. Such as "Zhonggan 11", "Lugan 1", "Zhonggan 12" and other varieties.
Second, timely cultivation of strong seedlings
1. The problem of sowing date is that the obvious problem of spring cabbage production is uncooked convulsions, because cabbage is a green body vernalization crop. If the seeding is too early, the seedlings grow too large, and when the low temperature condition is encountered, the vernalization stage is completed, causing early convulsions, so Sowing should be done at the appropriate time. Generally, in the middle and late December to the first half of January, the seedlings can be raised by using Yangshuo or the solar greenhouse. The specific time can be arranged according to the actual situation.
2. Before the seedbed is ready to be planted, the seedling bed should be applied to the large-circle manure or soil-fertilizer, and sterilized and disinfected with carbendazim.
3. Seed treatment and seeding selection of full seeds, soaking in warm water at 18 ° C for 2 h, and then maintaining 15 ~ 18 ° C germination. In the sunny morning, the bottom water is poured. After the water seepage, the germinated seeds are evenly spread on the surface of the glutinous rice. The soil is covered with 1cm, the seeding amount per m2 is 4g, and the seedbed area per 667m2 is 5m2.
4. The seedbed management should not be ventilated before emergence. The temperature should be kept at 20~25°C during the day and 10~16°C at night. After the seedlings are out, they are properly ventilated. During the daytime, the temperature is 18-20 °C, and the nighttime is 10-12 °C. After 5 true leaves of the seedlings, the temperature can not be lower than 10 °C to prevent the seedlings from passing through the vernalization stage. 8 days before planting, ventilation can be increased to carry out low temperature training of seedlings.
Third, fine land preparation, early shed
Choose loose and fertile, slightly acidic or neutral soil close to the water source. Before winter, apply 5,000 to 7500kg of rotted manure per 667m2, deep turn 20cm, make a flat of 1m or 1.5m wide, and bake the ground for 25 days before planting.
Fourth, reasonable close planting
After the spring frost, the ground temperature is stable above 5 °C, the temperature can not be lower than 9 °C before planting, plastic film arch shed cover cultivation, from the end of February to the beginning of March, choose sunny day morning planting. Protect the bandits when moving seedlings. After the planing, the water is poured and the soil is covered with water. It is also possible to first ditch, then plant the seedlings along the ditch, and then pour the clear water, planting 5000-6000 plants per 667m2.
V. Strengthening field management
1. After temperature management, it is necessary to pay attention to cold insulation, and strengthen the management around the improvement of temperature conditions. From 4 pm to 9 am, the grass should be covered with scorpions. During the period of 7 to 10 days during the slow seedling period, the shed temperature is generally not increased. 25 to 27 ° C during the day, 11 to 15 ° C during the night; after the slow seedlings, the seedlings are cooled, about 7 to 10 days, 15 to 20 ° C during the day and 12 to 14 ° C during the night. When the temperature in the shed before the growth exceeds 20 °C, the wind begins to be released. When the minimum temperature in the shed is stable above 10 °C, the small arch shed in the shed is removed.
2. The first top dressing is carried out about 15 days after the planting of water and fertilizer management, 15kg of ammonium sulfate per 667m2, and watering. After the appropriate control of water seedlings, when the ball begins to conceal, the seedlings are finished, and the second top dressing is carried out, 30 kg of diammonium phosphate per 667 m2, or 800 kg of manure and manure with water. After that, water is poured once every 7 days, but watering should be stopped a few days before harvest to facilitate transportation.
Sixth, harvest
In order to win the morning market, the market will be available one after another when the leafball is tight. Generally, it is harvested once every 3 to 4 days, and then harvested once every 1 to 2 days.
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