What are the precautions for thinning and final thinning of corn seedlings?
Thinning and final thinning of corn during the seedling stage are beneficial to its later growth, but the timing of thinning and final thinning must be grasped well; if thinning is done too late, it will not have the corresponding effect. Below, follow us to take a look at the precautions for thinning and final thinning of corn.
1. Thin and final-thin seedlings early at the right time
Corn thinning is generally carried out at the 3-4 leaf stage. At this time, the nutrients carried by the corn kernel are basically used up. If the seedlings are too crowded, the root systems between the seedlings intertwine with each other, and they will compete severely for water and fertilizer, while the leaves overlap and crowd each other. This will not only affect photosynthesis, but also cause the seedlings to reduce yield due to insufficient nutrition during growth. In addition, for fields with poor soil moisture and relatively severe pest damage, thinning and final thinning can be appropriately delayed to prevent dead seedlings and missing seedlings, but it should not be later than the 6-leaf stage at the latest; if too late, it will affect the individual root development of the plants and is also extremely unfavorable to seedling growth. Therefore, timely thinning and final thinning can both prevent seedling crowding and mutual shading, save soil nutrients and water, and also help cultivate strong seedlings.
2. Select or discard according to the seedling stage
Thinning and final thinning are not done casually; the principle of "remove the weak and keep the strong, thin the dense and keep the sparse, keep uniform and strong seedlings" must be grasped. For short seedlings, dense-leaf seedlings, seedlings that are thick at the bottom and thin at the top and incomplete, seedlings damaged by pests and diseases, and miscellaneous seedlings with obvious differences should be removed in time to avoid unnecessary waste. Select and keep strong seedlings that are uniform in size, even in plant growth, flat at the base of the stem, and free of pests and diseases, so as to ensure the quality of the seedlings.
3. Pay attention to the weather
Thinning and final thinning should both be carried out on a sunny afternoon, because seedlings damaged by pests and diseases and those with poor growth are very likely to wilt in the afternoon after being exposed to the midday sun, making it convenient to eliminate them. In short, scientific thinning and final thinning of corn can not only reduce labor and labor intensity and achieve twice the result with half the effort, but also promote corn growth and development and achieve the goal of increasing yield and income.
4. Pay attention to density
Thinning is meant to ensure density. For missing hills and broken rows, seedlings can be appropriately kept in adjacent hills (rows), but the paired seedlings should be as consistent in size as possible, and the same applies during final thinning. Planting too densely is not conducive to corn growth, and in the later stage it will also cause the field to become closed and shaded, which is extremely unfavorable to increasing yield.
The above is an introduction to the precautions for thinning and final thinning of corn seedlings. We hope it can help you. To learn more related knowledge, please continue to follow us.