It is time to plant spring corn. Careful farmers’ friends may notice that after the emergence of corn every year, there will always be cases where the size of the seedlings varies. The yield per plant of corn is high, and the lack of one plant is 150-300 grams. It is often said that "the spring is short of one seedling, the autumn is less than one kilogram of grain", and the lack of seedlings is 10%, and the yield is reduced by 60-80 kilograms. Therefore, it is guaranteed that the whole seedling is a prerequisite for high yield of corn. â€
Then the same piece of land, the same variety, at the same time sowing, why is the phenomenon that corn seedlings grow in size? Corn has large and small seedlings, which will affect the later production, so try to avoid this situation, these aspects should be remembered prison!
The emergence of corn-sized seedlings
Uneven soil moisture
When the weather is dry, it will cause uneven soil moisture. In this case, in a place with good sensation, the emergence of corn is early, in places where the sensation is poor, the emergence of corn is late, and the emergence of seedlings will lead to uneven growth of large and small seedlings. Therefore, when planting, we must pay attention to the soil. Lyrics, make plans in advance.
Seedlings are prone to empty rods, bald tips, and flower granules
Seeding in different shades
If the quality of the land preparation is poor, the soil will be uneven. When using mechanical sowing, the high places will be soaked deep, and the low places will be soaked; in addition, if there are too many fields in the field, they will be smashed during mechanical sowing. The impact of the seeding results in different shades. In the case of better sensation, the seedlings are planted late, and the seedlings are planted shallow early; in the dry weather, the seedlings are planted in the early morning, and the seedlings are planted in the evening, and the seedlings are formed.
Seeds are not graded or damaged
The quality of corn species will also affect the emergence of corn. Some corn seeds are not graded and selected, and the seed size is inconsistent. This will also lead to large seedlings, and small seeds will be weak, which will appear from the seedling stage. .
When the soil moisture is normal, the large grain grows into a large seedling, and the small grain grows into a small seedling, which leads to the emergence of large and small seedlings in the field.
The seed is broken. The damaged seeds are susceptible to infection, slow growth and growth, and easy to grow into weak seedlings, leading to large and small seedlings in the field.
Therefore, when purchasing seeds, it is necessary to observe the uniformity of the seeds and the damage rate of the seeds, so as to prevent the large-sized seedlings in the corn field from picking up the seeds.
Delay between time and seedling time
After the emergence of corn, it is necessary to timely seedlings and seedlings, to avoid crowding of seedlings, to compete with each other for competition, and to cultivate strong seedlings. The seedling work is generally carried out in the 3-4 leaf stage. Because the corn is in the “weaning period†before and after the 3-leaf stage, it is required to have good light conditions, which is conducive to the production of more nutrients and the supply of seedlings.
If the plants in the seedling stage are overcrowded and the roots of the plants are staggered, there will be competition for water and competition. Moreover, the leaves of the seedlings overlap each other, which not only affects photosynthesis, but also is prone to "mint shortage". Seedlings are generally carried out at 4-6 leaves. If the seedlings are not scheduled, the seedlings will be formed into small and weak seedlings, and finally the large and small seedlings will appear. So how to prevent corn size seedlings from appearing?
Measures to prevent corn size seedlings
1. Select a good variety with high purity and high germination rate, classify the seeds, sow the seeds with full grain, neat and uniform, and carry out the seed dressing.
2. Strictly control the quality of the land preparation, achieve high standard operation, and ensure that all seedlings and seedlings are broadcast.
3. Sowing at the right time. If you don't have time to pour water at the time of sowing, you can use shallow irrigation and irrigation to make the topping water after sowing. This is an important measure to protect the seedlings in dry areas.
4. Repression after sowing. After sowing, if the soil gap is large, the seeds are not easy to absorb water, affecting the whole seedlings of the corn, and the suppression after sowing can increase the contact between the seeds and the soil, and enhance the absorption of soil moisture by the seeds; it is beneficial to the increase of the water content of the lower layer and the moisture of the seed layer. The content is used to facilitate seed emergence.
5. Control the damage of insects, birds and beasts. After emergence, it is necessary to prevent underground pests in time to avoid shortage of seedlings.
6. If it is found that the seedlings are broken, etc., it is necessary to check the seedlings for replanting or transplanting.
7. If the fertilizer is applied, separate the seed fertilizers and prevent the burning of the seedlings.
8. If there is a large amount of rainfall before emergence after sowing, when forming the floor panel knot, it is necessary to carry out shallow cultivating in time and cut through the hard shell of the surface to help the seedlings unearth. But do not damage the young shoots when loosening the soil.
Is there a large and small seedling phenomenon in your home corn growth? The above problems must be avoided in advance!
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