The cause of abnormal growth of onion

Onion, as one of the most common side dishes in daily life, is very rich in nutrients, including potassium, vitamin C and other substances. Can prevent cancer, help digestion and other effects, but in the onion growth process will occur a lot of diseases, of which abnormal growth is more common. So what is the cause of the abnormal growth of onions? Let's have a look!

1. Climatic reasons

Onion is a biennial crop of seedling type in early spring, and its seedlings are not sensitive to temperature until they grow to a certain extent. If there is cold air or a sharp drop in temperature before the seedlings have grown to this extent, the direction of seedling growth will shift from nutrition to reproduction. If the low temperature is too long, the onion will vernalize and then blossom. If the temperature is too low, it will show partial vernalization and then abnormal differentiation, leading to the phenomenon of multi-fruit.

2. Seed causes

The situation of soil is different from that of environment, which is generally caused by the inadaptability of seeds to the soil environment and other factors. Because the period of low temperature and the length of sunshine are different in each place. For example, some seeds with poor cold resistance are very sensitive to low temperature, and they will blossom when the temperature is slightly lower. Planting with strong cold resistance will not blossom until it grows to a certain extent, which is not as good as the adaptability of local seeds.

3. Improper sowing time

Onion is a spring greening plant, if sown in January or earlier will affect the growth rate of seedlings, resulting in too long time, the area is too large. Beyond the volume size of onion vernalization, it is easy to appear non-vernalization phenomenon, and finally lead to abnormal growth.

4. Malnutrition

Most of this is due to excessive irrigation and over-application of nitrogen fertilizer, which will also affect the oversize of onion seedlings and hinder the formation of bulbs. And bolting and flowering will occur in the low temperature season. But if the soil is too dry and too little nitrogen fertilizer will lead to an increase in the ratio of carbohydrates in onions, the time of growth and flowering will be earlier, leading to flowering.

5. Other factors

There are generally ground maggots in the field, which will seriously harm the growth of onions and cause the growth of stems to slow down. And if in the cultivation, the cultivation depth should be moderate, too deep and too shallow will directly affect the growth of the stem.

The above five are the main causes of abnormal growth of onions, because onions have strict requirements on a variety of factors. Too much or too little will affect the growth of onions. Therefore, in the daily maintenance, as long as pay attention to the management of onions, the amount of fertilizer and water on the line. If you want to know more about agriculture, please continue to follow the pro-agricultural network.