What happened to the big and small corn seedlings?

Corn is a very popular food crop in our country. It is planted in most parts of our country, but many people often have the phenomenon of large and small seedlings when planting corn. The size of maize seedlings will affect the emergence uniformity of maize seedlings, which is very disadvantageous to the yield of corn and the planting benefit of growers. So what about the size of corn seedlings? The following editor will introduce to you, let's have a look!

1. Uneven soil moisture

When planting corn, if the weather is too dry and the soil is short of water. Then the soil moisture will be uneven, resulting in better soil moisture in places, seedling emergence is good, and the time will be earlier. On the contrary, in places where the soil moisture is relatively poor, the emergence of maize seedlings is not very ideal. Naturally, there is a phenomenon of large and small seedlings, so we should pay attention to maintain uniform soil moisture in the field after sowing. When sowing, you should properly irrigate the soil moisture at the bottom, and you can also pour through the water after sowing, mainly shallow irrigation, and keep the irrigation uniform.

2. The sowing depth is not suitable.

Before corn is sown, if the quality of soil preparation is relatively poor, it will lead to uneven soil. Then mechanical sowing will lead to deeper sowing in the high place and shallow sowing in the lower part, resulting in different sowing depths of corn seeds. When the soil moisture is better, the shallow seeds emerge earlier and faster, while the deeper seeds appear later. However, if the soil is too dry, the two conditions will be reversed, but if switched, there will still be large and small seedlings. Therefore, we should pay attention to the suppression work after sowing, ensure that the soil is flat, and control the sowing depth of each seed.

3. Seed problem

The seed problem is also a major problem leading to the size of maize seedlings. The quality of maize seeds has a direct effect on the emergence rate and seedling quality of maize. Before sowing, if there is no grading treatment of the seeds, resulting in different seed sizes, the big seeds will emerge early, while the small seeds will emerge late and form weak seedlings, resulting in the emergence of large and small seedlings in the seedling stage. In addition, if the seed is damaged, it is extremely vulnerable to the harm of bacteria, reduce its growth and development rate, easy to form weak seedlings, resulting in the phenomenon of large and small seedlings. Therefore, when purchasing seeds, we must pay attention to maintain the evenness of the seeds, do not select damaged seeds.

4. The time for setting seedlings is too late.

After the emergence of maize seedlings, in order to provide sufficient growth space for seedlings, we should do a good job of fixing seedlings. Ensure that each seedling grows normally and will not snatch fertilizer and water from each other. The time of seedling setting is very important, which should be carried out when the maize seedling grows to about 3 leaves, because the maize seedling is in a "weaning period" when the maize seedling is 3 leaves. At this time, the demand for light is relatively large. If the seedling fixing time is too late, then the impact on it is very great, and it is easy to appear the phenomenon of large and small seedlings.

The above is a brief introduction to the big and small corn seedlings. That's all for today's introduction. This article is for reference only. I hope it can help you all.