Key points of Corn plastic Film mulching Technology

First, select improved varieties. Select high quality hybrid varieties. Second, land selection and land preparation. Select the land with good drainage and irrigation conditions with flat terrain, deep soil layer and medium fertility. before sowing, you should pick up all the stones, weeds and residual roots, and plough deeply and finely once, so as to reach the standard of deep, loose, fine, flat and clean. Third, apply sufficient base fertilizer. Base fertilizer should be based on organic fertilizer, nitrogen, phosphorus, potassium, generally can be applied human and animal manure 20ml 30 kilograms, urea 50 jin, ammonium bicarbonate 60 kg, potash fertilizer 50 jin. In the method of fertilization, to achieve the isolation of seed and fertilizer, we can first open a 5-inch wide and 4-inch deep fertilizer ditch in the center of the box, apply all kinds of fertilizers into the ditch in turn, and then cover the soil 2 inch thick. In order to avoid the underdeveloped root system and the inability to absorb fertilizer to cause old seedlings, it is necessary to use dilute dung water to fill the nest as a kind of fertilizer when sowing. Fourth, timely raising seedlings. Xiaochun reserved the site, the seedling stage can be selected after the "sting", before "the Spring Equinox", the sowing date of the winter fallow land can be appropriately advanced. Fifth, the way of raising seedlings. In order to increase temperature and heat preservation, complete seedling, full seedling and strong seedling, it is best to use plastic floppy disk to raise seedlings. The method is to prepare nutritious soil (not too thin) according to the method of conventional fertilizing field and raising seedlings, and use 40 plastic floppy disks with 100 holes per mu. Seed selection, seed drying and germination test are carried out before sowing. When sowing, put the nutrient soil into the floppy disk hole to ensure that the nutrient soil occupies 3/4 of the pore volume, then press the seeds into the hole, cover a layer of fine soil with 2 grains in each hole, and spray once with a sprayer. Other management is the same as that of conventional fertilizer pellet breeding. Sixth, reasonable close planting. No matter the wheat field or the winter fallow land, it should be sent for planting in wide and narrow rows. The methods of double-row, wrong nest, drilling, single plant, grading and directional transplantation were adopted in maize. Planting about 3500 plants per mu, row spacing 1.5ft, turning back to nest 5.5mi 6in. Seventh, the requirement of covering film. When corn seedlings grow to 2Mel 4 leaves, start transplanting, before transplanting, first apply sufficient base fertilizer, flatten the side of the box with 100 grams of methamidophos per mu plus 50 grams of methamidophos and 50 kg of water to prevent grass damage and soil silkworms, then straighten the plastic film to cover the side of the box, then take the soil to cover the side of the box, and then take the soil to punch the wooden stick with a slightly pointed edge of the film, then first fill the nest with clear fecal water, and then transplant the corn in the hole, and cover it with fine soil around the seedling. Eighth, strengthen management. To prevent people and animals from trampling, it is found that the exposed edge of the broken film should be filled with soil in time, and the film can be uncovered and combined with weeding when applying ear fertilizer in the big trumpet mouth period. 9. Look at the seedlings and apply fertilizer. In the corn growing period, if there is a phenomenon of de-fertilization, urea can be used per mu in the seedling stage. 5Mel 5kg of water is applied beside the root. Urea can be used per mu in the big trumpet period. 5 kg (or 35 kg of ammonium bicarbonate) was applied in the middle of two rows and four nests of corn and covered with mulch to improve fertilizer efficiency. 10. Other management. Grasp the branches, emasculate, artificial pollination and pest control, and then remove the residual film.