What causes uneven corn seedlings? Latest cause analysis

Corn is a very popular food crop in our country. It is grown in most parts of our country, but many people often encounter the phenomenon of uneven corn seedlings when growing corn. Uneven corn seedlings affect the uniformity of corn seedling emergence and are very detrimental to corn yield and growers' planting returns. So what causes uneven corn seedlings? Below, the editor will explain it to everyone, let's take a look!

1. Uneven soil moisture

When planting corn, if the weather is too dry and the soil lacks water, then the soil moisture will be uneven as a result, so that in places with better soil moisture, seedling emergence is good and the time is also earlier. On the contrary, in places with poorer soil moisture, corn seedling emergence is not very ideal. Naturally, the phenomenon of uneven seedlings appears. Therefore, after sowing we should pay attention to maintaining uniform soil moisture in the field. When sowing, water once appropriately for bottom soil moisture, or water thoroughly after sowing, mainly with shallow irrigation, and keep watering uniform.

2. Unsuitable sowing depth

Before sowing corn, if the quality of land preparation is relatively poor, then the soil will be uneven in height. Then when mechanical sowing is carried out, it will cause deeper sowing in high places and shallow sowing in low places, resulting in inconsistent sowing depth of corn seeds. And when soil moisture is equally good, seeds sown shallower emerge early and quickly, while seeds sown deep do the opposite and emerge later. However, if the soil is too dry, the two situations will be reversed, but if reversed, the phenomenon of uneven seedlings will still appear. Therefore, after sowing we should pay attention to doing a good job of compaction, ensure the soil is level during land preparation, and control the sowing depth of each seed well.

3. Seed problems

Seed problems are also a main problem causing uneven corn seedlings. The quality of corn seeds has a direct impact on corn emergence speed and seedling quality. Before sowing, if we do not grade the seeds and this causes seeds to differ in size, then large seeds emerge early, while small seeds emerge late and form weak seedlings, thus causing uneven seedlings to appear at the corn seedling stage. In addition, if seeds are damaged, they are extremely susceptible to harm from pathogens, reducing their growth and development speed, and are prone to forming weak and small seedlings, thus causing the phenomenon of uneven seedlings. Therefore, when buying seeds we must pay attention to maintaining good seed uniformity and must not select damaged seeds.

4. Too late thinning and final singling

After corn emerges, in order to ensure sufficient growth space for the seedlings, we should do a good job of thinning and final singling. Ensure each seedling grows normally and does not compete with each other for fertilizer and water. The timing of thinning and final singling is very important. Thinning should generally be carried out when corn seedlings grow to about 3 leaves, because when corn seedlings have 3 leaves they are in a “weaning period” of the seedling, and at this time the demand for light is relatively great. If thinning and final singling are too late, then the impact on them is very great, and the phenomenon of uneven seedlings is extremely likely to appear.

The above is a brief introduction to what causes uneven corn seedlings. That is all for today's introduction. This article is for reference only, and I hope it can help everyone!