How to grow corn

To plant corn, the following methods can be adopted:

1. Reasonably dense planting

The suitable density of high-oil corn is 4,000 to 4,500 plants per acre. In order to reduce the number of empty stems and improve the uniformity of the population, the number of seedlings that emerge should be about twice the suitable planting density; at the 4 to 5-leaf stage, the number of seedlings should be 1.3 to 1.5 times the suitable planting density; the upper limit of the suitable planting density should be density. The silk spinning period can be combined with assisted pollination to assist in pollination of weak plants, which can eliminate empty stalks and ensure a uniform population.

2. Scientific fertilization

In order to promote plant growth and increase grain weight and oil content, nitrogen, phosphorus and potassium fertilizers should be added. Generally speaking, 1000-2000 kilograms of organic fertilizer per mu, 8 kilograms of phosphorus pentoxide, 8-10 kilograms of nitrogen, 1-2 kilograms of zinc sulfate, 2-3 grams of nitrogen fertilizer in the seedling stage, 5-7 days after jointing. Apply 10 to 12 kilograms of nitrogen fertilizer.

3. Chemical adjustment

High-oil corn plants are usually 2.5 to 2.8 meters tall. Controlling high resistance is one of the key measures for high oil corn yield. Generally speaking, 30 ml of corn can be sprayed per acre during a major flare, or the new growth regulator Vitalin can be sprayed per acre during a major flare.

4. Timely treatment of pests and diseases

High-oil corn has strong resistance to large spot disease, but the incidence of corn borer is higher. This prevention and control method can be used at the bellmouth stage, with 3 to 5kg of mites, 3kg of chlorpyrifos, and 2kg of carbofuran granules. In high-incidence areas, it can be applied to pistils again during the silking period, which can effectively reduce the loss of shoots and ensure high yields and harvests.

Extended information

Precautions for planting corn

1. Suitable sowing and reasonable dense planting

Sowing should be carried out according to the local climate. The temperature in the planting area of ​​Shangcai County has dropped sharply, and rainforest pests are serious. The main purpose of planting is to regulate the temperature to ensure that the corn can survive heavy rains. The premise is to mature early and avoid environmental factors for later growth in a timely manner. The most suitable planting distance for corn is 35-40cm between each plant, which gives corn seeds enough space to grow and the water and nutrients needed for growth.

2. Reasonable irrigation

After sowing, keep it moist to ensure the emergence of seedlings. After emergence, the surface soil should be kept moist, especially during the critical period of heading or water demand. If there is a lack of water or difficulty in dehydration, there will be less pollen and poor vitality. Therefore, sufficient water should be provided in time to ensure the water required for normal growth of corn. Corn is drought tolerant in the seedling stage. During this period, we should not give it too much water, which is not good for their growth. The rainfall in Henan Province is quite suitable. Generally speaking, there is no need to water corn seedlings during the normal rainy season, but if it is in summer, you may need to strengthen the management of corn fields because in summer. There are a lot of heavy rains in Henan Province. If you don't pay enough attention to the situation, flooding can occur. Therefore, growers should always pay attention to weather changes and take necessary measures to deal with rainy weather.

Reference: Baidu Encyclopedia of High-yield Cultivation Technology of Sweet Corn