Integrated Technique of Water and Fertilizer for Drip Irrigation under

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Integrated Technique of Water and Fertilizer for Drip Irrigation under

Under-film drip irrigation technology is the integration of advanced irrigation technology and fertilization technology, which not only play a plastic film cultivation to improve ground temperature and reduce the role of evaporation between trees, but also to achieve corn on-demand irrigation, fertilization, moisture and nutrients continued to transport uniform To the roots near the soil, for root absorption, improve water use efficiency, to increase production efficiency purposes. The technology mainly includes laying drip irrigation system and drip irrigation under the conditions of corn yield and efficiency of cultivation techniques.

Technical Highlights:

Fine ground preparation facilities foot base fertilizer

Pre-planting ridge preparation, wide and narrow line of cultivation, the general narrow behavior of 40 to 50 cm wide line 60 to 80 cm. Stubble stubble stubble or deep tillage, plowing depth to reach 20 to 25 cm, so that the real under the virtual, no Ke Lu, clods, combined with the site preparation of foot base fertilizer, timely suppression, to be broadcast state. General investment in high-quality agricultural fertilizer per acre of 1000 to 2000 kg, 15 to 20 kg of DAP, 5 to 10 kg of potassium sulfate or 30 to 40 kg of compound fertilizer base fertilizer applied. Using a large-scale land preparation machine to complete a ridge preparation work, soil preparation effect.

Laying drip irrigation pipe

According to the water source location and the block shape, the main pipe laying method mainly has the independent type and the compound type two kinds: The independent main pipe way laying method has the labor saving, the province material, the ease of operation and so on, but does not suit the large area work; The laying of the compound main pipe can carry out large-area drip irrigation operation, requiring the water source and the plots to be close, and the field can be equipped with a fixed place for using the power supply. Branch of the laying of a direct connection method and the indirect connection method two. Indirect connection method has the characteristics of flexibility, maneuverability and so on, but increased the control, the connection piece and so on the part, the one-time investment cost enlarges. Branch distance between 50 to 70 meters in the drip irrigation operation speed and quality of the best.

Scientific selection of reasonable density

Plastic film mulching drip irrigation, optional dense type, growth period than the open varieties of 7 to 10 days long, the effective accumulated temperature of more than 150 ~ 200 ℃ varieties. Seed treatment was carried out before sowing in the conventional manner. Reasonable increase in planting density, with the amount of species than the average planting method 15% to 20%.

Fine sowing

When the plow layer 5 to 10 cm temperature stability by 8 ℃ when you can open plow sowing. With the thickness of 0.01 mm of plastic film, mulch width according to ridge width may be. By planting methods can be divided into seeding on the membrane and seeding under the film two.

1. Film seeding: the use of corn mulch drip irrigation precision multi-purpose planter seeding, drip irrigation with tape, spraying herbicides, mulching, sowing, cover soil, the repression operation once completed, the operating sequence is drip irrigation → spraying Herbicide → cover film → planting → cover soil → suppression.

2. Under the film sowing: mechanical sowing, semi-mechanical sowing and artificial sowing, etc., after sowing with a mechanical herbicide spraying on the ridge, after spraying to timely film. Plastic film on both sides of the soil to be enough, every 3 to 4 meters but also in the film on the pressure of some soil, to prevent wind blowing the big film. Membrane sowing should pay attention to the timely introduction of seedlings, cover Miao: When the general emergence of corn 1 to 2, the timely Jialong cited seedlings, seedlings after the introduction of wetlands with a hole to conceal seedlings. Over 3 to 5 days and then once, will be out of the seedlings out of late.

Strengthen field management

Corn mulch drip irrigation must often check the mulch film is tight and found to be damaged or soil pressure is not real, in a timely manner with earth pressure, to prevent the wind blown away, so that moisture preservation. In accordance with the laws of corn water requirement of timely drip irrigation.

1. Drip irrigation: equipment installation and debugging, according to soil moisture timely irrigation, each irrigation 1 hectare, according to the length of the capillary to open a "zone" number, the first working pressure in 2 pressure, generally 10 to 12 hours irrigation Through, then can be converted to the next irrigation area.

2. Top-dressing: According to the characteristics of corn water demand fertilizer, according to the proportion of fertilizer into fertilizer, with water fertilization, to prevent post-failure of premature aging, improve water use efficiency. Calculate the amount of fertilizer used in each irrigation area, dissolve the fertilizer in a large container, and pour the solution into the fertilizer tank.

3. Chemical control: due to planting density, high temperature, water foot, plant growth, in order to prevent excessive growth caused by plant lodging, 6 to 8 leaf stage to take chemical control.

4. Appropriate late harvest: in order to fully mature corn, reduce moisture, improve quality, in the harvest may be appropriate according to the specific circumstances of late harvest.

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