Some farmers think that the sooner the corn is planted, the better, but this often results in poor corn emergence. Generally, corn seeds can germinate at 6 ° C to 7 ° C, but the germination will be slower. Therefore, when planting corn, the management of the seedlings is very important. Today, Xiaobian talks about how to manage the corn seedlings.

First, preparation before seedlings

1. Seed quality: select high-yield, high-resistance mid-late ripe maize hybrids, such as sc704, Zhengdan 958, etc., artificial grain selection, seed quality to water content less than 13%, purity more than 95%, clarity 98% Above, the germination rate is 95% or more, and the 1000-grain weight is 330 g or more.

2, need fertilizer water: total fertility total fertilization 60-70 kg, the ratio of nitrogen, phosphorus, potassium is 1:0.4-0.5:0.15-0.2. Drip 8-9 times during the whole growth period, each time dripping 40-45 square meters, the amount of irrigation water is 260-300 square meters.

Second, field management

1. Land selection: Choose cotton, wheat, sugar beet, tomato, oil sunflower, etc. The soil organic matter content is above 0.8%, the alkaline nitrogen is ≥50mg/kg, the available phosphorus is 8 mg/kg, and the soil salinity is less than 0.3%.

2, fertilization and land preparation: before the harvest of the first crop, irrigation water storage in autumn and winter, 100-120 square meters per mu. Full-layer fertilization, 500-1000 kg of organic matter per mu, no fertilization land, 100 kg of high-quality manure and 50 kg of oil residue before ploughing. Deep application of chemical fertilizer, 20% of nitrogen fertilizer and 80% of phosphate fertilizer are used for full-layer fertilization of base fertilizer. Turn into the tillage layer with the plough, the depth of the ploughing is more than 28 cm, the ploughing depth is consistent, the tumbling is even, and the fine ground is protected before winter.

3. Soil agent treatment: Spray herbicide before sowing. The herbicide is sprayed with a herbicide such as pendimethalin or acetochlor, and sprayed with a diagonally mixed soil. Herbicides are used interchangeably.

4, seed treatment: 2-3 days before treatment, with 50% phoxim emulsion, according to the amount of seeds 0.25% plus a small amount of water for seed dressing, prevention and control of ground tigers and other underground pests; with 25% powder rusting according to the amount used 0.4% or 0.5% copper sulfate seed dressing to control smut.

5. Site preparation before sowing: To ensure high quality, the quality of land preparation must meet the “six-character” standard of sputum, flat, loose, broken, clean and homogeneous, so as to ensure the quality of sowing and achieve a full seedling.

Third, the appropriate sowing

1. Appropriate early sowing: When the soil temperature of 5 cm is stable for 10 days at 10-12 °C, seeding can be started. Generally on April 5-20, the best on April 10-20.

2, seeding amount: precision seeding, 2.8-3.2 kg per mu.

3, seeding method: using 1.45 cm mulch, a double membrane, 60 + 30 cm wide and narrow line, or 1.2 cm mulch, a membrane and a tube, (20 + 45 + 20) + 60 cm wide narrow line. The plant spacing is 24 cm. On-demand on the film.

4, seeding quality: sowing depth 3-4 cm, requires broadcast straight, line spacing consistent, accurate line, uniform seed, uniform depth, good soil, strict suppression. The film is flat and the film is tight. The drip irrigation belt is shallowly buried.

The above is the pre-emergence management technology for planting corn. The early sowing of corn will be affected by the temperature in early spring. After the seeds are germinated, they are susceptible to freezing damage and loss of vitality, which will also reduce the emergence rate. Farmers can master the above-mentioned pre-plant management techniques, which is also the most important basis for planting corn. I hope the above can help farmers.

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Nuts are a group of cleistoses that have a hard skin and contain a single seed. It is the essence of plants, rich in nutrition, containing higher minerals, vitamins, oil and protein, eating more can promote growth and development, increase physical fitness. Common nuts include walnuts, peanuts, almonds, cashews, macadamia nuts, pistachio nuts and so on.

Nuts, Almonds,Walnuts,Pistachio nuts,Macadamia nuts

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