Water and fertilizer integration technology for drip irrigation under corn film

Membrane drip irrigation yield-increasing technology is the integration of advanced irrigation technology and fertilization technology. It not only exerts the effect of mulching cultivation to increase ground temperature and reduce evaporation between trees, but also realizes on-demand irrigation and fertilization of corn, and uniformly and continuously transports water and nutrients. The soil near the roots is absorbed by the root system to improve the utilization rate of water and fertilizer, and achieve the purpose of increasing production and increasing efficiency. The technical content mainly includes the cultivation of drip irrigation system and the cultivation and cultivation technology of corn under drip irrigation conditions.

Technical points:

Fine ground preparation

Before planting, the ridges are ridged and cultivated in wide and narrow rows. Generally, the narrow behavior is 40 to 50 cm and the width is 60 to 80 cm. The smashing machine is used for smashing or deep-spinning, and the depth of ploughing should reach 20 to 25 cm. Generally, 1000-2000 kg of high-quality agricultural fertilizer, 15-20 kg of diammonium phosphate, 5-10 kg of potassium sulfate or 30-40 kg of compound fertilizer are used as the base fertilizer. The landscreting operation of the whole land is completed once by the large-scale combined soil preparation machine, and the land preparation effect is good.

Laying drip irrigation pipes

According to the location of the water source and the shape of the land, the main pipeline laying methods are mainly independent and composite: the independent main pipeline laying method has the advantages of labor saving, material saving and simple operation, but it is not suitable for large-area operation; The laying of the composite main pipe can carry out large-area drip irrigation operations, requiring the water source to be close to the land, and the field has a fixed place for power supply. There are two types of branch pipes: direct connection method and indirect connection method. The direct connection method has low input cost but large water pressure loss, resulting in uneven soil moisture; the indirect connection method has the characteristics of flexibility and operability, but increases the control, connecting parts and other components, and the one-time input cost is increased. The speed and quality of drip irrigation with a distance between 50 and 70 meters is the best.

Scientific selection and reasonable densification

The mulching film is covered by drip irrigation, and the varieties with dense density and growth period are 7 to 10 days longer than the open varieties, and the effective accumulated temperature is 150 to 200 °C. Seed treatment is carried out in a conventional manner before sowing. Reasonable increase in planting density, the amount of seed used is 15% to 20% more than the common planting method.

Fine seeding

When the plough layer is 5 to 10 cm and the temperature is stable and passed through 8 ° C, it can be ploughed. With a film having a thickness of 0.01 mm, the width of the film is determined according to the width of the ridge. According to the seeding method, it can be divided into two types: membrane seeding and membrane seeding.

1. Sowing on the membrane: seeding with multi-purpose precision seeding machine under drip irrigation with corn film, spraying drip irrigation belt, spraying herbicide, covering the ground film, sowing, soiling and repressing operations, the operation sequence is drip irrigation belt → Spraying herbicides → covering the ground film → sowing → soiling → suppression.

2. Seeding under the membrane: mechanical sowing, semi-mechanical sowing and artificial sowing can be used. After the sowing, the herbicide is sprayed on the ridge by the machine, and the film should be coated in time after spraying. The soil on both sides of the mulch should be sufficient to press the soil on the membrane every 3 to 4 meters to prevent the wind from blowing up the membrane. Seeding under the membrane should pay attention to timely introduction of seedlings and seedlings: When the corn is generally seeded with 1 or 2 pieces, the seedlings are introduced in time, and the seedlings are covered with wet soil after the seedlings are introduced. After another 3 to 5 days, the seedlings will be taken out.

Strengthen field management

Under the drip irrigation of corn film, it is necessary to check whether the film is strict or not. If it is found that there is damage or soil pressure is not correct, it is necessary to use the soil pressure in time to prevent it from being blown away by the wind to ensure heat preservation. Drip irrigation according to the water requirement of corn crops.

1. Drip irrigation: After the equipment is installed and commissioned, it can be irrigated according to the soil moisture. Each hectigation is 1 hectare. The number of “zones” opened once is calculated according to the length of the capillary. The first working pressure is within 2 pressures, generally 10-12. Hours of irrigation, then you can switch to the next irrigation area.

2. Topdressing: According to the characteristics of corn required for water, the fertilizer is put into the fertiliser according to the proportion, fertilizing with water, preventing premature defamation and premature aging, and improving the utilization rate of water and fertilizer. The amount of fertilizer used in each irrigated area should be calculated, the fertilizer dissolved in a large container, and the solution poured into a fertiliser tank.

3. Chemical control: Due to high planting density, high temperature, sufficient water, and rapid growth of plants, in order to prevent the plant from growing too high and causing lodging, it should be controlled in the 6 to 8 piece leaf stage.

4. Appropriate late harvest: In order to fully mature the corn, reduce the water, and improve the quality, it can be harvested as appropriate according to the specific conditions at the time of harvest.

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