The corn mulching and double row mulching cultivation technology adapts to Jiping Siping, Changchun, Liaoyuan, Songyuan and most of the high-yield counties (cities) in Heilongjiang. Maize big ridge double row mulching cultivation techniques can increase production by an average of 15%.

Second, the technical points

Laminated film

Film can be used with a width of 90-100 cm width, thickness 0.007-0.008 mm thin film, 60 kg per hectare, artificial or mechanical coating can be. When the film is covered, the film is flattened and stretched. It is affixed to the ridge surface. Both sides are compacted with soil. The width of the coating is about 60-70 cm. Covered with 1.0-1.5 cm intervals on the ridge

Press a soil to prevent the wind from peeling off the film.

2. Field management

(1) Shear hole induced seedlings

When maize emerges and the first true leaf is unfolded, it is necessary to cut the seedlings in time to induce seedlings, and then use seedlings with wet soil to seal the seedlings.

(2) Controlling corn mash

In accordance with local conditions, biological, physical and chemical control techniques such as Trichogramma, sex attractants, Beauveria bassiana, high-pressure mercury lamps, and chemical pesticide granules were integrated to prevent corn borer.

(3) Appropriate release film

The film can be removed from the end of June to the beginning of July, and the film must be cleaned to reduce white contamination.

(4) Dressing

In the big bell-mouth period, 300-400 kilograms of urea are used per hectare, and the method of applying fertilizer is applied to the ridge-side deep-fertilizer, and the top-dressing depth reaches 8-10 cm.

(5) promote cooked

Spraying plant growth regulators at the same time can also promote early maturation by removing the grasses in the fields and land, removing the non-functional leaves at the bottom of the plant, and drying the stalks and leaves.

Third, pay attention to matters

Apply to local conditions, pay attention to solve the residual film pollution.

Small data: Comparison of the number of plants in double rows and small ridges on large ridges

1. Comparison of the number of plants per acre (according to 22 cm of plant spacing): about 5,512 plants per mu for large and small ridges, about 4,664 plants per mu for small ridges, and 848 plants per acre for large- and double-row rows.

2. Comparison of area (according to acre): Two rows of large ridge plant 5.5 acres, equivalent to small ridge planting 6.5 acres, that is, a large ridge planting 5.5 acres is equivalent to a variety of small ridges more than 1 acre.

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