How to prevent onion bolting?

How to prevent onion bolting? Also ask experienced netizens to help introduce the method onions in the production process, there is often the phenomenon of bolting. Once bolting occurs, it will have a great impact on the yield and quality of onion, so the planting network has sorted out three methods to prevent onion bolting, which are listed in detail below for netizens' reference. Method 1. Select the appropriate sowing date: sowing is not only the key measure to prevent onion bolting, but also the key to high yield. Generally, the timely sowing time is from late September to early October, which can avoid the defects of large seedling growth, false stem diameter more than 0.6 cm and bolting rate because of early sowing (early September). It can also avoid the situation of small seedling growth, small bulb and low yield due to sowing too late (sowing in late October). Method 2. Select the appropriate calibration period: onions are generally better planted from November to December, and strong seedlings are selected. The planted strong seedlings grow rapidly after the Spring Festival, the bulb expands quickly, the bolting rate is low, and the yield is high; if the large seedlings are planted, the growth during the overwintering period is large, the reproductive growth is exuberant after the Spring Festival, the bolting rate is very high, and the yield is low; while the planted seedlings, because of the lack of growth, the bulb is small and the yield is low. Method 3. Fertilizer and water management of onion: no topdressing was applied during the overwintering period of onion, and fertilizer was applied three times after the Spring Festival, that is, the first time in the middle of March, the second time in the middle of April and the third time in the first ten days of May. Urea 15kg / mu and potassium sulfate 5kg / mu were applied each time to promote its vegetative growth, inhibit reproductive growth and reduce bolting rate. In addition, when bolting occurs in the field, bolting should be done in time to reduce yield loss. Sowing methods of onions how to plant onions with high yield click to get more onion planting techniques click to get more vegetable planting techniques