How to save seeds by sowing corn in busy spring? What is the planting method of super high yield?

It is busy in spring again. The so-called plan for a year lies in spring. It is time for the seeds stored in the warehouse for several months to wake up. Today, Xiaobian will introduce to you how to save seeds for corn sowing. What is the super high yield cultivation method?

How does corn seed save seeds?

1. Do a good job of seed treatment

(1) Sun-drying seeds before sowing. It can increase the emergence rate by 15%~20%, early emergence by 1~2 days, and increase the yield by 64%. Before sowing, the seeds are spread out and dried around noon on sunny days for 4~5 hours every day for 2~3 days.

2. Soak seeds. Generally, cold soaking, warm blanching and human urine soaking three kinds. Cold water soaking time is about 12 hours, warm scalding ("two open and one cool" warm water, the initial temperature is about 56 ° C)6 hours, human urine soaking is to use 25 kilograms of human urine placed for about 7 days to mix with 25 kilograms of water, soaking for 12 hours. Soaking solution should be flush with seeds.

③ seed dressing. Seed dressing can be done with seed coating agent of 1% seed dosage. Seed dressing with biological agent Si-1 biological potassium fertilizer, 0.5 kg per mu, thick with 200 ml water, mix well with seeds. If the soil is zinc deficient, zinc sulfate can be used for seed dressing, with a dosage of 5 grams per kilogram of seed.

The suitable sowing time of interplanting maize in wheat field is 7~15 days before wheat harvest. The interplanting time of mid-ripening and late-ripening corn varieties or middle-low yield wheat fields should be early, early-ripening corn varieties or high-yield wheat fields should be late, and the interplanting time of plots with poor irrigation conditions should be mainly subject to moisture content. Unconditional interplanting of summer direct seeding corn, take the stubble sowing, the earlier the better.

2. Fine seeding

① The relative moisture content of soil should not be less than 70% when corn is sown.

(2) Precision ditching and sowing, according to the average row spacing of about 62 cm (large row planting, large row 80 cm, small row 45 cm), with a 5~6 cm deep sowing ditch or plough, with 18~20 cm plant spacing single seed, about 5500 plants per mu, and then covered with wet soil.

Seedling preparation and supplementary planting At the same time or later, according to 300~400 plants per mu, seedling is raised in the field head or nutrition pot. 5~6 leaves, seedlings with soil, and the upper leaves of high-foot seedlings cut off a third, the lack of seedlings broken ridge for replanting. Pay attention to watering and compaction when replanting.

II. What is the super-high-yield planting method?

1. Seed treatment: corn seeds exposed to sunlight absorb water quickly after sowing, germinate early, emerge neatly, seedling rate is high, and seedlings are strong.

2. Soaking and seed dressing: Soaking in clean water is mainly to supply water and promote germination. Soaking seeds with chemicals mainly include potassium dihydrogen phosphate and trace elements, but if the concentration of soaking seeds is too high or the soaking time is too long, the seeds are easy to be poisoned and suffer, reducing the germination rate. Seed dressing with pesticides can control pests and diseases. Seed coating is the coating of seeds with a drug. Coated seeds have the ability of disease resistance, insect resistance and promotion of rooting and germination after sowing, so they should be used for local diseases and insect pests.

3. Carefully prepare moisture: soil moisture is the key to affecting the quality of seed emergence. Good moisture content, flat land, easy to seed depth consistent, neat and uniform emergence. An important link of soil moisture preparation before sowing is the adjustment of soil moisture. Seasonal drought often occurs after wheat harvest in summer and interplanting summer corn areas of Huanghuai River, which makes the moisture content of corn worse when sowing.

4. Reasonable density: Reasonable density should consider the variety characteristics. Secondly, if the soil fertility and fertilizer amount are large and reasonable, the appropriate density will be large. In areas prone to drought and without irrigation conditions, planting density should be thin.

5. Calculation of seeding quantity: seed quantity (kg)= seeding density × number of seeds per hole × seed weight × area. We should focus on developing maize precision sowing technology and improving sowing quality.

6. Sowing depth: Sowing depth is generally 5-6cm. In the soil with better moisture content, it should be properly shallow, preferably 4-5cm. Loose sandy loam, should be appropriate deep sowing, 6-8cm is appropriate. If the soil moisture is large, it is not suitable for deep sowing, and the soil should be properly deep sowing.

7. After sowing suppression: after sowing soil cover, to appropriate suppression, drought to heavy suppression, and soil moisture too much, do not suppress.

8. Appropriate seed fertilizer: proper seed fertilizer can provide sufficient nutrients for seedling development, promote seedling growth and enhance resistance to adverse factors such as drought, low temperature and disease. Seed fertilizer includes small amounts of nitrogen, phosphorus, potassium and trace element fertilizers. The amount of seed fertilizer used should be controlled and the seed fertilizer isolated to avoid burning seedlings. Generally, 5-8kg diammonium phosphate is applied per mu, and the effect is good.