First, planting time
1, spring planting and autumn harvest: raise seedlings in March-April, then plant in May-June, and finally harvest in10-1February. ?
2. Spring planting and winter harvest: seedling is raised in March-May, then planted in June-July, and finally harvested in 1 February to the following year1month.
3. Spring harvest of summer and autumn seeds: raise seedlings in May-September, then plant in September-11month, and finally harvest in May-July of the following year.
4. Winter planting and harvest in spring and summer: seedling will be raised in September-1October, and then planted in1-1February, and finally harvested in May-July of the following year.
Second, the planting method
1, land preparation and arable land: when planting green onions, choose plots close to water sources, which is convenient for watering. Before planting, you should plow deeply, at least 30 cm. Clean up the weeds and pests inside, which is convenient for management in the later stage. Ditching should be carried out after cultivated land, and the width of 1- 1.5 will do.
2. Planting method: There are three methods for planting green onions, namely seed propagation, ramet propagation and bulb propagation. Most of them are carried out by strip sowing or strip planting. Strip planting means that the distance between each plant is 5-8 cm, and the soil should be watered before planting, which can improve its survival rate.
3. Fertilization management: Young Chinese onion seedlings consume more nutrients during their growth, so not only base fertilizer should be applied, but also topdressing should be done in time. If thin branches and leaves are found, potash fertilizer should be applied in time to promote vigorous growth. In addition, pay attention to the high temperature and plenty of rain in summer, and drain it in time, so there can be no water in the soil. Weeds should be removed in time when they are found.
4. Reasonable watering: After the green onion is planted, it is necessary to promote rooting, control the watering times during the period, and drain water in time to prevent waterlogging after the rain to avoid causing rotten roots, yellow leaves and dead seedlings. After transplanting, if it encounters a rainy climate, it will lead to rotten roots and dead seedlings of green onions, so pay attention to timely drainage, and when it encounters high temperature and dry weather, water it to cool down.
5. Timely topdressing: After beginning of autumn, "attacking leaf fertilizer" should be topdressing, generally 20-25kg of calcium superphosphate and 0/500-2000 kg of decomposed farmyard manure can be applied per mu. After the Millennium, it is necessary to apply "attacking the tree fertilizer" twice in combination with watering, and urea 15-20kg and potassium sulfate 10- 15kg can be applied per mu each time.
6. Timely soil cultivation: The main purpose of soil cultivation is to soften leaf sheaths, prevent lodging, and improve the yield and quality of scallion. From beginning of autumn Festival to harvest, it is generally necessary to cultivate soil for three times. The first two times can be combined with intertillage, and the ridge soil will be put into the scallion ditch, and then the ditch will be filled up after the summer heat.