Cabbage, also known as cabbage, cabbage, lotus, cabbage, cabbage, cruciferous genus, apical buds or axillary buds can form a variant of leaf ball, a biennial herb. Originating on the Mediterranean coast, it has been transmitted to China for more than 200 years and is now cultivated throughout the country.
(I) Cabbage spring cultivation techniques
1. Sowing seedlings choose good early maturing varieties that are precocious, disease resistant, and strong in winter. Most parts of northern China are planted in late January or early February in Yangshuo or planted in the greenhouse in early February. The seedlings are planted in Yangshuo and planted in the greenhouse in northeastern or northwestern China in early February.
Yangshuo will cover the film 1 week before sowing, and every 10m2 of Yangshuo seedling bed will be matured with high-quality horse dung and other organic fertilizers l00-150kg and compound fertilizer 1-1.5kg. Miao mattress soil and covered soil should be sprayed with carbendazim or thiophanate disinfectant. When the water is leaking, sprinkle a thin layer of fine soil and broadcast the dried seeds. 1 m2 seedbed species 5 ~ 8g, after sowing cover about lcm, cover surface film moisturizing, soil around the seedlings sealed insulation.
After the seedlings were removed, the plastic film was peeled off. After the seedlings were covered with thin soil once, the soil was kept warm and the ventilation was gradually reduced. The seedlings were seeded at 3 to 4 leaves. Seedlings have 4 to 5 leaves. When the stem is thicker than 0.5 cm, the night temperature of the seedbed should be less than 8 to 10°C, and the amount of ventilation should be 15 to 20°C during the day. Gradually strengthen ventilation and exercise seedlings from 7 to 10 days before planting, and 3 days before planting, the seedbed can be peeled off at night.
2. Planting spring cabbage to plant in winter, apply 5000kg of organic basal fertilizer per acre, turn to leveling, make flat mulch or plastic film mulching, and apply 48% trifluralin herbicide to prevent grass before spraying the film. Planting was carried out from the end of March to the beginning of April. Planting was carried out in the northern part of north China and northeast from late April to early May. The hole is planted, the hole is planted with water in the early stage of planting, and the water is poured or ditched when the plant is planted in the late stage. The planting density is 30 to 33 cm x 30 to 40 cm. Plastic film cover should be carried out before planting. Covering can also be done after planting, but it is more laborious.
3. Field management After pouring the seedlings, two or three times of continuous cultivating are performed to promote the growth of the root system. The seedlings will be grown for about 10 days and the soil will be watered when it is dry. At the beginning of the game, the outer leaves and the bulbs grow at the same time. The fertilizer needs more water. When the leaflet fists are large, they are topped with water and applied fertilizer. Each mus of urea is applied with 20 kg of urea or 50 kg of ammonium bicarbonate. Afterwards, the water is poured once every week for a total of 3 to 4 Secondary water, if necessary, watering with fertilizers in the middle of the ball to promote leaf ball growth and compaction.
4. The spring cabbage harvested should be harvested early, the leaf ball is basically solid, and the outer bulbs are harvested when shiny.
5. Pre-excessive convulsions and their prevention To prevent premature convulsions, special attention must be paid to the following points:
(1) Use a strong winter breed or hybrid generation.
(2) Grasp the appropriate sowing date, sowing early, and accepting the low temperature period at the seedling stage is usually the main reason for pre-convulsions.
(3) During the seedling raising period, the seedling temperature should be lower in the early stage of seedling growth to prevent the seedlings from growing too fast. After 3 to 4 leaves, the bed temperature should be appropriately increased to promote rapid seedling growth and prevent seedlings from feeling low temperature.
(4) Planting at a proper time, strengthening fertilizer and water management after planting, and promoting vegetative growth.
(5) Pre-convulsions can be prevented by the use of arch shelters or improved mulch films, etc., and protection from low temperatures during the early growth stage.
(b) Summer Cabbage Cultivation Techniques Summer Cabbage should use medium-maturing varieties that are heat-resistant, drought-tolerant and tolerant. Generally, seedlings are sowed in batches from late March to early May, and planted from May to June and harvested from July to September.
Summer Cabbage should pay attention to organic fertilizer, high ridge or sorghum in areas with high rainfall in summer, and flat ridges in areas with low rainfall, 3,000 kg of farmyard manure per acre, 50-60 kg of compound fertilizer, 20 kg of urea, and planting density of 3,000-3,500. Strain/acre. For the convenience of drainage, it is advisable to use ridge and furrow irrigation, and the irrigation time should be performed in the morning or early evening to avoid adverse effects of high temperature and humidity. Colonization should be done in the evening or on cloudy days to prevent sun exposure. Seedlings should be transplanted with earthworms and then transplanted with water after planting. When the sapling seedlings are topdressed, the cultivator l ~ 2 times. The water is poured into the ground, watered in the morning or evening, and well water poured after the heat. In the early and middle stages, the top dressings were topped once. There are many weeds in summer, and more cultivators and insect pests must be controlled. After the leaf ball matures, it is timely harvested to avoid cracking and rot.
(3) Autumn Cabbage Cultivation The cool weather after the autumn cabbage seedling stage is suitable for the growth of all cabbage varieties, and it is easy to obtain high yields. In regions where the frost-free period is long, early and mid-maturing varieties are often used. Seeds will be planted from mid-to-late June to mid-July in July. Seedlings will be exposed in the open season. Short-season frost-free areas use large-scale late-maturing cabbage, one-year cultivation, from late March to mid-April, Yangshuo nursery, from late May to mid-June. The high temperature, rain, and strong light during the seedling growth of young cabbage are extremely unfavorable for the growth of the seedlings. The shade nets are needed to cover the seedlings.
After the emergence, the shading nets were uncovered in time, and they were covered in sunny days at noon. After 10:00 in the morning and after 4 in the afternoon, the shade net should not be covered in cloudy weather. To be grown to 2~3 true leaves for one time, will grow too dense and keep a certain interval. A total of 2 to 3 occasional seedlings were planted, each time a small amount of water was poured after the seedlings. In case of drought, the water was sprayed every morning and evening, and a small amount of seedling fertilizer was applied to prevent the seedlings from aging.
After planting, the water is poured into a lotus seedling stage, and 20 kg of urea can be applied per acre in combination with watering to promote the growth of stems and leaves. The second time the first ball is topdressed, 25 kg of compound fertilizer is applied per mu, and thereafter 5 to 7 days are poured. Once in water, the leaf ball has a prosperous period of growth. The third time it is top-dressing, applying 20 kg of urea per acre will promote compaction of the leaf ball. Rainy weather drains moisture in time. After easing the seedlings to the ridge, about 2 or 3 times of cultivating and weeding are performed.
LED Batten Lights,LED Batten Lights Fitting,LED Batten Fittings
Ningbo Wellway Optoelectronic Technology Co.,Ltd , https://www.wellwayopto.com