Corn sowing has the saying that "spring fights for the day, when the summer fights", it is necessary to broadcast early and shorten the sowing date. Seeding is too early, the temperature changes rapidly in spring, and the seeds are susceptible to freezing damage after seed germination and lose vitality, reducing the emergence rate. So, when is the spring maize in 2019 planted? Which varieties can produce high yields? Let’s take a look!

Sowing time

Sowing time of spring maize in Henan: The suitable sowing date is generally from late April to early May. When the soil surface layer is 5 to 10 cm deep and the temperature is between 10 ° C and 12 ° C, seeding can be carried out.

Shandong spring corn planting time: Shandong region generally grows spring corn in early April and harvests at the end of August.

Northeast spring corn planting time: planting time after Gu Yu (about April 20), before May 10, the harvest is after October 1st, before October 20th.

Sowing time of Hebei spring corn: sowing from late April to early May, harvesting in late August.

Anhui spring corn planting time: In order to prevent pests and diseases, it is recommended that spring corn should be planted early, usually in early April.

Which varieties can produce high yields?

Tieyan 31 corn seed iron research 31 corn ear cone type, short stem, stalk leaf, ear length 19.9 cm, ear row number 16 to 20 rows, cob red, grain orange yellow, grain type dentate type, hundred The grain weight was 34.4 g and the seed yield was 86.2%.

Hongshuo 787 corn variety Hongshuo 787 corn growth period takes about 127 days, the required accumulated temperature of 2750 °C. The plant height is 265 cm, the ear height is about 105 cm, the ear row number is 16-20 rows, the ear cone is cylindrical, the small thin axis is deep dentate type, the grain length is thick and thick, and the bulk density is high.

The advantages of Midland 178 Corn Species 178 Maize are strong buds, strong arching ability, drought resistance, anti-insect ability, anti-spot disease, resistance to bacterial wilt, stable yield and good adaptability.

Liaoji 939 corn seed Liaoji 939 corn belongs to artificial inoculation disease resistance (worm) identification, high resistance to stem rot, medium resistance to Curvularia leaf spot, silk smut, big spot disease and corn borer; field nature The onset of the disease, high anti-tumor smut, moderate gray spot resistance.

Shibin 992 corn seedling 992 corn seed ear type, in the eucalyptus leaves, the ear length is 19 cm, the cob is red, the grain is yellow, the 100-grain weight is 41.1 g, and the seed yield is as high as 80%.

Precautions

Do not blindly prematurely sow corn for proper early sowing, prolong the growth period, mature, and increase yield, but not the earlier the planting, the higher the yield. Spring corn is planted too early and is vulnerable to pests and diseases such as rough disease and underground pests.

The sowing depth should be appropriate regardless of the machine broadcast, hand point, corn sowing depth requires 3 to 5 cm, if the sensation is good, sowing 3 cm deep, sowing too deep will cause slow emergence, weak seedlings, if the watering is too large, then The emergence of seedlings is very poor, resulting in lack of seedlings.

Pay attention to the rational fertilization of spring sowing corn fertilization with base fertilizer, the base fertilizer is mainly farmyard manure, the topdressing fertilizer is mainly nitrogen, the spring corn needs to chase twice nitrogen fertilizer in the first season, and the small bell mouth period and the big bell mouth period are respectively chasing 15 kg of urea per mu.

In time, the water in the head is poured, and the water must be poured in time. Watering should be appropriate. After watering, the surface should not contain water. Flooding with large water can easily form water in the field, resulting in slow emergence of seedlings, yellow seedlings, and even serious shortage of seedlings.

The sowing amount should be uniform. Before seeding, after the seeds are poured into the planter, turn the seed wheel to see if the amount of each row is the same. If it is consistent, plant the seeds again to avoid inconsistency in the emergence of each row.

Prevention and control of red spiders and coarse-cured disease spring-sown corn is prone to red spider disease, and this winter's high temperature is very conducive to the wintering reproduction of red spiders. Prevention and control of red spiders should be based on prevention, choose avermectin + 哒螨 或者 or both of the compound preparations, spray control at the seedling stage (about 6 leaves) or red spiders, and spray again at the big bell stage This will control the harm of Starscream.

The key to prevention and treatment of corn rough disease is to control insects. Spray 10% of imidacloprid 20g + 2.5% high-efficiency chlorofluorocyanide 50ml per acre, spray once every 5 to 7 days, even spray 2~3 times. Pay attention to spraying the weeds on the edge of the field and the ground, not just spraying the corn plants.

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