Cultivation techniques of Maize in greenhouse

Corn is a large crop planted in our country, which can be planted in the open air or in the greenhouse, so what is the cultivation technology of corn in the greenhouse?

1. Basic introduction of corn

Corn is an annual herb of Gramineae, native to Central and South America. It is an important food crop in the world, widely distributed in the United States, China, Brazil and other countries.

There are many types of corn varieties, including grain forage varieties, vegetable varieties (including waxy type, sweet type, corn shoot type), processing varieties (sweet corn, corn shoots), popcorn varieties (special popcorn varieties) and so on.

2. Cultivation techniques of Maize in greenhouse

1. Select the place

Select suitable land for corn growth and transportation, and ploughing deeply in time.

The depth of deep ploughing is generally 25cm to 30cm. After deep ploughing, you should rake and crush it with a disc rake or nail teeth in time. After the beginning of spring, we must seize the opportunity to rake the ground, cut off the soil capillaries, reduce water evaporation and lay a good foundation for sowing.

2. Sowing seeds

Select the appropriate sowing time and isolate it properly.

The intact seeds without mildew, disease and moth were selected before sowing, and then soaked in 0.2%-0.3% potassium dihydrogen phosphate solution for 7 hours for 10 hours. After absorbing enough water, the seeds were taken out and drained, moisturized and germinated at 20: 28 ℃, and sowed when the seeds were evenly exposed.

Isolation is the first thing to consider when growing sweet corn. Generally, time isolation and spatial isolation can be used. Time isolation requires that the sowing dates of other types of corn and sweet corn be staggered, with an interval of more than 30 days in spring and more than 20 days in summer. Spatial isolation requires that no other types of corn should be planted within 300 meters of sweet corn. The appropriate isolation method can be chosen according to the actual situation in production.

To grow sweet corn, just like growing vegetables, choose plots with loose soil and apply sufficient base fertilizer. Generally, 2000-3000 kg of organic fertilizer, 15 kg of urea, 50 kg of superphosphate and 5-10 kg of potassium sulphur were used as base fertilizer per mu.

3. Field management

During the period of maize growth, we should do a good job in the management of factors such as watering, checking seedling gaps, prevention and control of diseases and insect pests and so on.

1. Watering: watering should be carried out from the jointing stage, that is, after the end of squatting seedlings, and flood irrigation should not be carried out at the jointing stage, so as not to cause excessive stem growth, improve panicle position and reduce lodging resistance.

2. Check seedling deficiency: check seedling deficiency in time after seedling emergence. In direct seeding field, there are 2 seedlings per hole at 3 leaves and 1 plant per hole at 4 leaves. Interseedling and fixed seedlings adopt the principle of removing weak and strong, removing impurity and purity, 3500000 seedlings per mu.

3. Prevention and control of diseases and insect pests: according to the plant protection policy of "prevention first and comprehensive control", combined with different cultivation methods and sowing time of local sweet corn, the method of combining agricultural control with chemical control is adopted in the prevention and control technology. use little or no drugs as far as possible, give priority to the use of high-efficiency, low-toxic, low-residue pesticides, and promote the use of biological pesticides.