How to grow summer corn for high yields? Detailed explanation of key cultivation techniques
How can summer corn be grown for high yields? Please explain the planting method in detail. The summer corn planting method can refer to the following: 1. Select excellent varieties. Such as: Jifeng 58, Xingkang No. 2, Jidan 31. 2. Seed treatment. Sun the seeds to promote after-ripening and improve seed vigor; treat seeds with chemicals, using a 100-fold solution of 1605 or methamidophos fertilizer, cover the seeds for 2-3 hours, dry them and sow; treat seeds with micronutrient fertilizer, boron, zinc, molybdenum, 2-4 grams per kilogram.
How can summer corn be grown for high yields? Please explain the planting method in detail
The summer corn planting method can refer to the following:
1. Select excellent varieties. Such as: Jifeng 58, Xingkang No. 2, Jidan 31.
2. Seed treatment. Sun the seeds to promote after-ripening and improve seed vigor; treat seeds with chemicals, using a 100-fold solution of 1605 or methamidophos fertilizer, cover the seeds for 2-3 hours, dry them and sow; treat seeds with micronutrient fertilizer, boron, zinc, molybdenum, 2-4 grams per kilogram.
3. Sowing. Summer corn should be sown early without delay, with sowing completed before June 25. The sowing rate depends on grain size, generally about 5 jin, with a sowing depth of 4-6 cm.
4. Seedling stage management.
1. Check and fill in seedlings: ensure full stands, uniform stands, and strong seedlings.
2. Timely thinning and final singling: thin seedlings at the 3-leaf stage, and final singling at the 4-5 leaf stage.
3. Reasonable dense planting. For early-maturing short-stalk varieties, leave about 5,000 plants per mu; for medium-maturing varieties, about 4,000 plants; for late-maturing varieties, 3,500-4,000 plants.
4. Strengthen water and fertilizer management to promote early seedling growth. The seedling stage of summer corn is short and development is fast, and field management is often delayed, so seedling stage management should be carried out early, with promotion as the main approach.
5. Ear stage management:
1. Topdressing. After corn begins jointing, stalk fertilizer should be applied in time at 8-10 kg (urea), and booting fertilizer at the large trumpet stage at 15-20 kg (urea).
2. Watering. If drought occurs at the jointing stage of summer corn, water in time to promote normal growth and development of summer corn; at the large trumpet stage, water in time to promote ear development. This period has the highest water requirement, so suitable water and fertilizer supply must be ensured to improve root water absorption capacity, increase leaf photosynthetic intensity, promote the massive occurrence of secondary roots, promote the normal growth and development of female and male ears, and ensure large ears and many grains.
3. Drain promptly in case of waterlogging. In the late growth period of corn, root vigor gradually weakens, and waterlogging will seriously affect corn growth; therefore, drainage and waterlogging prevention should be carried out in time.
6. Artificial supplementary pollination should be done well at the flowering stage. Generally, it can increase yield by 8-10%.
7. Detasseling. Detasseling is a simple and easy yield-increasing measure, generally increasing yield by about 10%. The suitable time for detasseling is when the tassel has just emerged from the top leaf but has not yet shed pollen. Except at the field edges and corners, detasseling should be carried out in the field by alternating rows and plants.
8. Harvest at the appropriate time. When more than 90% of the plants in the corn field have yellowed and loose husks, and the kernels have hardened so that a fingernail leaves no dent when pressed, harvest in time.
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