2. Sow and raise seedlings in the open field from April to June in summer, choose high potential land, plough 2 meters, deeply turn over decomposed manure, and level the border. Soak the seeds for 3 hours, and sow after the seeds are dry. Water the bottom of the seedbed, spread the seeds on the border, cover them with seed mud and pour enough water. In case of high temperature and drought, cover the border with sunshade net, and uncover the net in the morning and evening after all the seedlings are planted. The fertilizer and water in the seedbed should be moderate and not too dry.
3. Sow in the shed from July to September in autumn. Accelerating germination requires soaking seeds. The method is to wrap the seeds in gauze and soak them for 3-4 hours, then take them out and put them in the refrigerator 10- 15 hours. When 75% germinates, it can be planted. It is best to use a small arch shed or greenhouse for sowing seedlings in autumn. Pay attention to soil moisture after emergence, don't get too wet, remove weeds in time and ensure smooth drainage.
1. Soil preparation: Before planting, apply 3500 ~ 4000 kg of decomposed organic fertilizer, 20 ~ 25 kg of phosphate fertilizer, 40 ~ 50 kg of nitrogen fertilizer, 0/0 ~/5 kg of potassium fertilizer/kloc-0, and 0/~ 65435 of border width.
2. intertillage weeding: after slowly planting seedlings, apply a small amount of available nitrogen fertilizer 1 ~ 2 times in combination with watering. Generally, 5 kg of urea or ammonium sulfate is applied per mu to promote plant growth and development. In the future, we should always keep the soil moist and intertillage and weed in time.
3. Close the shed in time: Youmaicai is a fast-growing leafy vegetable, and the suitable growth temperature is 18 ~ 25℃. Close the shed when the temperature is lower than 12℃ at night, and adjust the temperature and relative humidity in the shed in time after closing the shed. Generally, the relative temperature in the shed is less than 90%.
4. Rational topdressing: During the cultivation of oilseed vegetables, it should be kept clean and hygienic, and 0.3% potassium dihydrogen phosphate and urea solution should be sprayed on the leaves for 3 ~ 4 times in the early and middle growth stages. Topdressing 2 ~ 3 times in the whole growth period, and applying 5 ~ 10 kg of urea or ammonium sulfate 10 kg per mu.
5. Pest control: The pests of oilseed vegetables are mainly aphids, and 40% dimethoate EC can be sprayed 800 times. The main diseases are downy mildew and soft rot, which are controlled by spraying 70% mancozeb wettable powder 300 ~ 500 times and 0.02% agricultural streptomycin respectively.
6. Timely harvesting: When the number of leaves of the oil wheat vegetable reaches 30-34, the plant height is 45-48 cm, and the spreading degree is 60-69 cm, it can be harvested once at a distance of 2-3 cm from the ground. After harvesting, the old leaves and diseased leaves will be removed, so as to supply the winter market in time.