Spring Chinese Cabbage Cultivation Cultivation Spring Deficiency

Cabbage cultivation in protected areas can fill the spring shortage, with an average plant weight of 1.5 kilograms and an income of 5000 to 7,000 yuan per mu.
Selection of good varieties of low temperature resistant, resistant to early bolting, early maturing, resistance to soft rot disease varieties, common autumn and winter Chinese cabbage varieties are not suitable for spring off-season cultivation. At present, the better varieties used in production are Shengchun, Chunjiang, Jujin, and Spring and Autumn Period 54.
The proper sowing time shall be strictly controlled and the sowing time shall not be so long as to prevent the plants from passing vernalization under low temperature conditions, resulting in pre-convulsions. The general principle is to ensure that the average daily temperature during the growing season of spring cabbage is stable at more than 13°C, and planting can be advanced or delayed depending on the cultivation facilities and varieties. The greenhouse is covered with small sheds and covered with plastic film. It is broadcast live from the end of January to early February, and is harvested in the middle and late April. Sheds were planted in small sheds and covered with mulching. They were planted in mid-February, transplanted in early April, and harvested on the market in mid-May. Small sheds and mulch-covered mulching were planted and transplanted about one week earlier. The mulching film covers the live broadcast and is sown in late March and early April. It is harvested from the end of May to the beginning of June.
Seeding seedlings in early spring sowing heat preservation seedlings to prevent early convulsions. In the greenhouse, nutrition seedlings are planted, and 2 seeds are sown per seedling. The amount of seed used per mu is 50 g. After the real leaf grows, the seedlings will be settled, leaving a strong seedling for each pod. In the greenhouse, multiple layers cover the insulation, and when the cold wave comes, the non-woven or shade net and other materials are used to insulate the small arch shed. When the temperature of the shed is higher than 20°C during the daytime, ventilation and cooling are required to prevent leggy. Ventilation and hardening of seedlings were conducted according to the condition of seedlings before transplanting.
Timely planting seedlings are about 40 days old, with 6 to 7 leaves selected for sunny planting. Do 1 meter wide rake, 2 lines per pod, plant spacing 40 cm, 3000 cultivars per mu. Before planting, the mulch was covered with a plastic film. After planting, the urine was excreted and the membrane hole was sealed with mud. Broadcast 2 seeds per hole, cover the film after sowing, after 5 days or so, the film will be released immediately after emergence, the plastic film breaks with soil pressure, 10 days after emergence and time seedling Dingmiao. Greenhouses and small arch shelters and other facilities for cultivation, the growth of pre-incubation, after the growth of the film according to the level of temperature and remove film ventilation, daytime shelf temperature is maintained at 20 ~ 25 °C, at night around 15 °C. In the middle and late April, when the minimum temperature is above 15°C, all membranes will be removed for open cultivation.
Fertilizer management Spring cabbage has a short growing season. After planting, management is promoted and promoted. Basal fertilizer was applied before planting and 4,000 kg of organic fertilizer and 50 kg of superphosphate were applied per acre. During the growth period, urea or human excreta is applied in time according to the growth of the plant. In the ball stage, the ball fertilizer is applied again, and urea is applied to 10-12 kg per acre.
Prevention and control of pests and diseases mainly include viral diseases, downy mildew, soft rot, aphids, yellow striped hops, and diamondback moths. Prevention and treatment of diseases, selected sunny spraying chlorothalonil, metalaxyl, can be killed (77% copper hydroxide wettable powder) and other agents. It was found that the diseased plants of soft rot were eradicated in time to prevent the spread of pathogens with rainwater. Insects were imidacloprid, avermectin, carat (5% flupronil dispersible liquid).