December has entered the cold winter. After the harvest of semi-hardy vegetables is completed, only a few cold-tolerant vegetables remain in the vegetable fields and winterize in the field in the form of seedlings. The main work in December is concentrated in greenhouses, hotbeds and multi-storied greenhouses.
I. Cultivation of eggplant seedlings planted in early spring in early spring Tomatoes, eggplants, and peppers are the main vegetables cultivated in early spring. They are generally used in greenhouses and hotbeds in mid-December, and can be used in Yangshuo or greenhouses in the southern part of the province. Cover seedlings to raise seedlings, seedling age of nearly 100 days, budding when planting. It can be planted in greenhouses in the middle of March, in the middle of the arch shed; the cultivation of open field mulch needs to be done after the frost in mid-April. If you use the shed plus grass cover cultivation generally can be harvested in late April.
Second, the cultivation of early-maturing cabbage, cauliflower seedlings in the middle and late December sowing seedlings in the greenhouse, in mid-February by 10 cm square seedlings. If the arch shed cultivation can be directly planted by the cultivation distance to the shed, can be harvested in mid-April; open film cultivation in early March colonization, harvest in mid-May. Early-maturing cabbage seedlings must not be blindly advanced. Otherwise, due to the excessively prosperous and oversized seedlings of the seedlings, with the requirement of vernalization conditions, the “pre-existing pumping†phenomenon will occur. Early-maturing cabbage varieties can be selected 8398, Gan 12; Cauliflower can be used, white stone.
Third, the protection of the area to delay the celery to strengthen the cold insulation shed celery into the December growth rate has been slow. Most tree types have reached the harvesting standard and can be flexibly controlled according to market prices. If you want to postpone further, you must pay attention to cold protection. The north of Yubei need to cover the grassland outside the shed to protect against the cold, and the south of Henan Province also needs to cover 2-3 layers around the shed outside the shed. Because the cold resistance of the grown celery is reduced, if the temperature of -3°C appears in the shed, the petioles of the plant will be cracked, lodged and destroyed.
Fourth, solar greenhouse vegetables into the cold-maintenance management phase of the winter grass raft plus a layer of rain film can increase room temperature 1.5-2 °C. The exposing time can be postponed to 9 o'clock and the closing time can be advanced to 4.30 p.m. Insulation is the mainstay, and ventilation is generally not used. At noondays, the membrane can be removed for short periods of time. Slow winter growth, low temperature, low water demand. Do not pour as little or as little as possible. If watering is required, only small water can be poured from under the mulch, and the water can not be poured. Fertilizer does not need to chase. Due to less ventilation and humidity, we must pay attention to the inspection of the disease. Once the onset of the disease occurs, it should be sprayed promptly.
Fifth, do a good job in the shed cold pepper work cold pepper minimum temperature requirements above 7 °C, if there is no cold grass only two layers of film, it is difficult to resist the low temperature in December. If it is damaged by low temperature for a long time, the leaves will fall off and the fruit will become soft and lose its commercial character. It is hoped that the growers will decide the harvest time according to their own insulation conditions, and do not blindly postpone the delay if the conditions are not met.
6. Fill the frozen water with onions, garlic and winter cabbage, cauliflower, etc., which are wintered in the fields. If the drought is short of water, it can generally be used to fill frozen water in mid-December to protect the seedlings from overwintering and prevent dead seedlings. In particular, winter cabbage and cauliflower are resistant to a low temperature of -15°C for a short time when the soil moisture is sufficient. If the water shortage occurs again, the outer leaves will fall off and fall off, seriously affecting the yield of leaf and flower bulbs.
Seventh, the arched shed and leeks boxes began to buckle through the low temperature of the top of the leeks. At this point, the dry leaves above the ground to clean, open 10 cm deep ditch in the root, Mushi chicken manure 500 kilograms, and with 800 times the liquid phoxim phosphorus ditch ditch irrigation, then seal the ditch, stuffy killing. After three days, the water was flushed with water and the soil was loosened every few months. The grasshoppers are stamped at night, and the first knife can be harvested before the Spring Festival. If the single-layered film is covered, it is generally delayed by half a month than the cover grass.
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