Careful farmer friends may notice that corn grows in different sizes during the growth process. The productivity of a single plant of corn is high. If one plant is lacked, the yield is 150-300 grams, and the shortage of seedlings is 10%. The yield per mu is reduced by 60-80 kg. Therefore, to ensure that the whole seedling is a prerequisite for high yield of corn. So why do the corn seedlings grow in different sizes on the same land, the same variety, and sowing seeds at the same time?
Reasons for the appearance of small and large seedlings
Uneven soil moisture When the weather is dry, it can cause uneven soil moisture. In the places with better soil moisture, the corn emerges early, and in the areas with poor soil moisture, the corn emerges late, and the emergence of the corn will also cause uneven growth of small and large seedlings. .
The depth of sowing varies. If the quality of the land preparation is poor, the soil will have unevenness. When using mechanical sowing, the depth will be sowed in the high places and shallow in the low places; Due to the influence of Shijiazhuang, the planting depth varies. In the case of good soil moisture, the late seedling emergence is late, and the shallow seedling emerges early; in dry weather, the deep seedling emergence is early, and the shallow seedling emergence is late, and large and small seedlings are also formed.
If the seeds are not graded or the quality of the damaged corn seeds is affected, the emergence of corn will also be affected. Some corn seeds are not graded and selected, and the size of the seeds is inconsistent. There appeared small and large seedlings.
Measures to prevent the emergence of small and large seedlings
1. Select good seeds with high purity and high germination rate, classify the seeds, sow with large, neat and consistent seeds with large grains, and perform seed dressing with medicine.
2. Strictly control the quality of site planting and achieve high-standard operations to ensure that all seedlings and all seedlings are sown.
3. If it is too late to soak the bottom water during sowing, the topping water after sowing requires shallow irrigation and even irrigation. This is an important measure to maintain seedlings in arid areas.
4. Suppression after sowing can increase the contact between seeds and soil, and strengthen the absorption of soil moisture by seeds; it is conducive to the increase of soil moisture in the lower layer and improves the moisture content of the sowing layer, so as to facilitate the emergence of seeds.
5. Prevent emergent pests in time after emergence to avoid lack of seedlings.
6. If it is found that there is a lack of seedlings and ridges, etc., the seedlings should be checked and replanted or transplanted in time.
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