How to Save Seeds When Sowing Corn During the Busy Spring Season? Detailed Explanation of Super High-Yield Planting Methods

It is once again the busy spring season. As the saying goes, the whole year's work depends on a good start in spring. The seeds that have been stored away in the warehouse for months over winter are ready to awaken. Today, the editor will introduce to you: How to save seeds when sowing corn? What are the super high-yield planting methods?

1. How to Save Seeds When Sowing Corn?

1. Do a good job of seed treatment

① Sun the seeds before sowing. This can increase the emergence rate by 15%-20%, advance emergence by 1-2 days, and increase yield by 64%. Before sowing, choose a sunny day around noon to spread the seeds out to dry. Sun them for 4-5 hours each day for 2-3 consecutive days.

② Soak the seeds. Generally, three methods are used: cold soaking, hot soaking, and human urine soaking. Cold water soaking time is about 12 hours; hot soaking (“two parts boiling water and one part cold water” warm water, initial temperature about 56°C) for 6 hours; human urine soaking uses about 25 kg of human urine that has been left standing for about 7 days mixed with 25 kg of water, soaking the seeds for 12 hours. When soaking, the soaking liquid should be level with the seeds.

③ Chemical seed dressing. For chemical seed dressing, use a seed coating agent at 1% of the seed weight. For dressing with the biological microbial agent Si-1 biological potassium fertilizer, use 0.5 kg per mu, mix with 200 ml of water into a paste, add the seeds and mix well. If the soil is deficient in zinc, use zinc sulfate for seed dressing at 5 grams per kg of seed.

Timely sowing: The suitable sowing period for interplanting corn in wheat fields is 7-15 days before wheat harvest. For medium-maturing and late-maturing corn varieties or medium-to-low yield wheat fields, earlier is better; for early-maturing corn varieties or high-yield wheat fields, later is better. For plots with poor irrigation conditions, the interplanting time mainly depends on soil moisture. For summer direct-seeded corn that cannot be interplanted, adopt stubble-adjacent sowing, and the earlier the better.

2. Fine sowing

① Sufficient and uniform soil moisture: When sowing corn, the relative soil water content should not be less than 70%.

② Open furrows for precision dibbling. With an average row spacing of about 62 cm (for wide-narrow row planting, the wide row is 80 cm and the narrow row is 45 cm), use a hoe or plow to open a sowing furrow 5-6 cm deep, sow single seeds at a plant spacing of 18-20 cm, about 5,500 plants per mu, then cover with moist soil and firm it.

Raise seedlings for replanting: At the same time as or slightly after sowing in the field, raise seedlings at the field edge or in nutritional pots at 300-400 plants per mu. At the 5-6 leaf stage, lift the seedlings with soil, cut off one-third of the upper leaves of leggy seedlings, and replant in areas with missing seedlings or broken rows. When replanting, pay attention to watering, filling soil, and firming.

2. What Are the Super High-Yield Planting Methods?

1. Seed treatment: Corn seeds that have been sunned absorb water quickly after sowing, germinate early, emerge neatly, have a high emergence rate, and produce sturdy seedlings.

2. Seed soaking and dressing: Soaking seeds in clean water mainly supplies moisture and promotes germination. Chemical soaking mainly uses potassium dihydrogen phosphate and trace elements, but if the soaking concentration is too high or the soaking time is too long, the seeds are prone to poisoning and damage, reducing the germination rate. Dressing seeds with pesticides can prevent and control pests and diseases. Seed coating is wrapping a layer of chemicals around the seeds. Coated seeds have the ability to resist disease, resist pests, and promote rooting and germination after sowing. Use the right chemicals according to local pests and diseases.

3. Carefully prepare soil moisture: Soil moisture is the key to affecting the quality of seed emergence. With good moisture and level land, sowing depth is easy to keep consistent, and seedlings emerge neatly and evenly. An important part of preparing soil moisture before sowing is adjusting soil water content. In the Huang-Huai summer corn and interplanted summer corn regions, seasonal drought often occurs after wheat harvest, worsening soil moisture at corn sowing time; therefore, in production, yellow water irrigation at wheat maturity is often used to supplement subsoil moisture.

4. Reasonable dense planting: Reasonable density should consider variety characteristics. Secondly, if soil fertility is high and fertilization is ample and reasonable, the suitable density is greater. In areas prone to drought and without irrigation conditions, planting density should be thinner.

5. Calculation of sowing rate: Seed amount (kg) = sowing density × number of seeds per hole × grain weight × area. Focus should be placed on developing precision corn sowing technology and improving sowing quality.

6. Sowing depth: Sowing depth is generally 5-6 cm. In clay soil with good moisture, sow shallower, 4-5 cm. In loose sandy loam, sow deeper, 6-8 cm. If soil moisture is high, do not sow deep; if the soil is dry, sow appropriately deep.

7. Pressing after sowing: After covering with soil after sowing, press appropriately. In drought, press heavily; when there is too much soil moisture, do not press.

8. Appropriate application of seed fertilizer: Applying an appropriate amount of seed fertilizer can supply sufficient nutrients to seedlings, promote growth during the seedling stage, and enhance resistance to drought, low temperature, disease, and other adverse factors. Seed fertilizer includes small amounts of nitrogen fertilizer, phosphate fertilizer, potassium fertilizer, and trace element fertilizers. When using seed fertilizer, control the amount and separate it from the seeds to avoid burning the seedlings. Generally, applying 5-8 kg of diammonium phosphate per mu gives good results.