In the process of onion planting, the old production area with production experience, the onion rate of onion is about 5%, and the inexperienced new production area, the onion rate of onion can reach more than 20%, seriously affecting the onion yield and quality, so benefit farmers The net small series of precautions to prevent and control the onion of the onion is for the reference of the majority of growers.

The reason for the early onset of onion is that after the seedlings have accumulated a certain amount of nutrients, the phenomenon of convulsions occurs under the conditions of long-term high temperature after continuous low temperature.

So how should the onion be uncooked first?

1. It is necessary to choose a variety that is strong in winter and not easy to twitch. The difference in winter strength between onion varieties is relatively large, so it can be said that variety selection is a shortcut to solve the problem of unripe onion.

2. Do not blindly plant early. The appropriate seeding period for the variety in a particular area should be indicated on the instructions for each variety and should be used as a reference. However, some people have said that the same variety was planted at the same time last year and this year. Why did it basically have no convulsions last year, and this year's convulsion rate reached 30%.

The reason is: First, the warmth of autumn and winter, especially the warm winter day, is long. During the winter, the onion seedlings can still grow slowly, causing the seedlings to be too large to meet the standard of low temperature induction. Second, the purity of the variety is low, especially the winter of the variety. Weakened and resistant to convulsions.

3. Seedbed management should promote the combination of control. Nitrogen fertilizer can not be applied too much, water should not be poured too much, otherwise the seedlings will grow too fast.

4. To produce a large onion, you can choose a seedling that is moderately sized. The key period of field water and fertilizer management is that the temperature in the spring will rise after the onion returns to green, and the fertilizer and water should not be lacking.

Finally, Hui Nongwang Xiaobian warm reminder: onion planting too early, too thin, or too much topdressing, too good nutritional conditions, will make the plants before the winter too large convulsions.

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