How to transplant onions

How to transplant onions? Please introduce in detail the transplanting of onions: timely planting onions and avoiding continuous cropping, applying high-quality rotten organic fertilizer 4000 / mu, diammonium phosphate 40 / 50kg, potassium sulfate 30kg / mu. The land is leveled into a border, and the width of the border depends on the width of the plastic film. Water before covering the film, spray 33% of the mu after the water seeps and apply 150 ml of herbicide. After covering the film, the plant spacing of 16 cm × 16 cm was punched before planting. The strong seedlings with age 55 Mel 60 days, plant diameter 5 mi 8 mm, plant height 20 cm and 4 true leaves of 3 mi were selected for planting. Generally, the suitable planting period is from November 1 to 10, and the planting depth is about 1 cm. Generally, 22000 ~ 24000 plants are planted per mu. Field management autumn sowing onion can survive the winter naturally after planting, pouring frozen water once before soil freezing, once turning green the next year, and applying quick-acting nitrogen fertilizer with water to promote the early development of seedlings. The number of times of watering the bulb during the expansion period increased, usually once every 10 days, to keep the land moist and stop water 10 days before harvest. The bulb expansion period is the key period of topdressing, with 15 kg urea, 20 kg potassium sulfate or 30 kg ternary compound fertilizer per mu. Note that the last topdressing should be more than 30 days from the harvest time. Disease and insect control onion is easy to be infected with downy mildew, purple spot and rust. Downy mildew and purple spot can be controlled by spraying 75% chlorothalonil 600 times or 25% metalaxyl 800 times per mu each time. Rust can be sprayed with 12.5% Wo Guo Li 20 grams plus 40 kg water per mu, once every 15 days, and sprayed 2 Mel 3 times in a row. Maggots can choose Tiannuojing 1kg plus fine soil 15Mel 20kg, mix well and sprinkle its rhizosphere to cover the soil. Thrips with onion can be sprayed with dimethoate 1500 times. Click to get more onion planting techniques click to get more vegetable planting techniques