First, onion should be controlled in the late stage of nursery watering, such as excessive watering, soil moisture, seedlings, although it appears to be strong, but the high water content, is not conducive to seedlings after the seedlings.
Second, about 10 days before planting onion, use 1 kg of 50% potassium dihydrogen phosphate and 50 kg of water to spray the seedlings in the seedbed evenly, or apply 500 g of potassium dihydrogen phosphate every 20 m2, which is conducive to the transplanting of seedlings. After the early hair roots, frost damage
Thirdly, plant rooting agents can be used to raise seedlings from the seedbed and trap the seedlings together to pick up the prepared rooting agent mucilage, so that the onion root is fully contacted with the rooting agent, which is advantageous for the early rooting of the onion, and also prevents Dead onions, rotten noodles and other phenomena.
Fourth, methods can be taken to remove the onion leaves from the seedbed. This method is suitable for early spring colonization. Most of the seedlings planted in early spring are nurseries in protective greenhouses. The stems of these seedlings are not thick and long and have a feeling of top-heavy and shallow roots. Two methods can be used to shorten the time for seedlings to grow: one is not required to transport directly. If the seedlings are planted, the onion seedlings may be graded, and the upper leaves may be cut from the uppermost one centimeter above the scissors with the scissors; the other is the seedlings that cannot be timely planted after the seedlings are lifted. In the seedbed, the upper leaves of the seedlings are cut off. The specific method is to cut off the upper leaves of the seedlings with a scissors or an electric knife about 10 days before the raising, as long as the innermost heart is not damaged. This will not only be beneficial to easing seedlings, but also conducive to rooting.
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