Two-color plastic film is a kind of multi-functional plastic film between black and white. The cultivation of corn with two-color plastic film not only has the functions of warming the white mulch and black mulch, protecting the rice, protecting the fertilizer, reducing pests, early maturation, and increasing the yield, but also has the functions of distance, labor reduction, etc. that are not available in white mulch and black mulch. It can well suppress the growth of weeds, better insulation and preservation performance, better standard planting, more coordinated nutrition space of individual plants, and higher photosynthetic efficiency of corn.
On February 25, Liu Xingcheng, senior agronomist of Agricultural Bureau of Nanjiang County, and Liu Xingcheng, head of the Agricultural Technology Station, held a meeting of the county's agricultural science and technology cadre's spring production technology training held in Heichi Village, Hongguang Township. He said that it is of great benefit to use two-color plastic film to cultivate corn. However, we must grasp the following six key technologies:
Optional plastic film
For corn cultivation, black and white bicolor membranes with a width of 2.1-2.3 ft. should be used. For the crops, short-cropping crops such as potatoes and peanuts should be used. The middle mulch film with black sides on both sides should be suitable; the intercropping of husks such as wheat and hummus should be suitable for the intercropping. Select the black mulch in the middle of the white. The width of black or white in the middle is narrower than that of corn, and it is generally maintained at 1.1 to 1.2 feet.
Fertilization
In the middle of the corn line, open a deep 20 to 30 cm fertilization ditch, generally more than 2000 kilograms of manure at the base fertilizer, 30 to 40 kilograms of standard nitrogen fertilizer, 30 kilograms of phosphate fertilizer, 10 kilograms of potash, 1.5 kilograms of zinc fertilizer, special compound fertilizer for corn Synergist 2 kg. The base fertilizer should be sufficient and white nests should not be allowed to grow.
The ditch
Open the wind upright and plow till it is harvested before harvesting. Remove residual roots, straw, stones and other debris, and smash the clods. In rain-saturated areas, the surface of the car is maintained at 1.5 to 1.8 feet, and the car is made of tile-back type. Corn is planted on the surface of the car. In areas with little rain, the surface of the car is maintained at 1.1 to 1.2 feet, and the surface of the car is made into a small ridge type. Corn is planted in both sides of the ditch.
Coating quality
The film must cover four levels: one is strict, the film stays close to the ground, leaving no gaps; the second one is tight, and the vertical and horizontal film is stretched moderately; three solids, the film is buried vertically in the soil and compacted, and the wind does not leak. Every 3 to 4 feet with a piece of soil pressure film; four wide, film pressure soil should not be too much, the film surface is not less than 1.5 feet, maximize the width of the mining surface.
Standardized transplanting
Along the black-and-white boundary line, the distance from the corn nest is 0.5 to 0.8 ft. Transplantation of corn: Small seedlings, single plant, orientation, grade transplanting, planting holes after transplanting seals, apply well rooting fertilizer; Direct seed corn implementation: nesting 2 to 3 seeds, sowing hole after sowing, two Ye Yixin to the three-leaf and one-year weak uniform to maintain strong strains.
Field management
After the film is covered, the mulch film should be inspected regularly. If damage is found, fine soil shall be used for timely sealing; corn seedlings shall be checked for seedlings 5 ​​to 7 days after transplanting, and the seedlings with 5 to 10 kilograms of urea shall be used in combination with seedlings for seedlings after survival. Replanting seedlings should be re-fertilized with “small stovesâ€; smashing and removing hoeing should be carried out; transplanting should be carried out for about 20 days after transplanting maize; at the same time, attacking manure application, prevention of drought and flooding, artificial pollination, and comprehensive control of diseases, pests and weeds must be maintained. Maize seedlings grow robustly.
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