How to cultivate corn with plastic film?

How to cultivate corn with plastic film? Please instruct that plastic film mulching cultivation of corn has obvious effects on increasing temperature, preserving moisture and improving soil physical and chemical properties. Generally, it can increase the effective accumulated temperature of corn in the whole growth period by 200~300℃, advance maturity by 7~15 days, and increase yield by about 150 kg per mu. 1. Select hybrid seeds. Select suitable for dense planting, strong resistance, late not premature aging and high productivity of individual hybrid. Generally, varieties with 7~15 days longer growth period, or 150~300℃ more accumulated temperature and 1~2 more leaves than local open field corn varieties should be selected. Second, choose plastic film. 1. Film thickness and width. In the southern low temperature, low light, rainy and high humidity areas, plastic film with thickness of 0.005~0.007 mm and width of 600 mm can be selected. In the areas with more weeds in farmland, plastic film with thickness of 0.008~0.01 mm can be selected. 2. Amount of plastic film. The mulch film with thickness of 0.008 mm and width of 800 mm shall be used for 3.7~4 kg per mu; the mulch film with thickness of 0.006 mm and width of 800 mm shall be used for 3 kg per mu; and the mulch film with thickness of 0.006 mm and width of 600 mm shall be used for 2.5 kg per mu. Third, land selection and preparation. 1) Selection of land. Select the flat or gentle slope with deep soil layer, loose soil, medium fertility and high yield potential. It should not be planted on steep slopes, barren land and fields with serious soil erosion. 2. Cultivate and ridge. Before harvest should be ploughed in time, ploughing depth of 18~22 cm is appropriate, ploughing after timely rake soil moisture conservation. Ridging should be carried out according to the predetermined sowing row spacing, planting in wide and narrow rows, ridging in narrow rows, and covering 2 rows per ridge. Ridge width 40~50 cm, ridge height 7~10 cm. Ridging is best done continuously with mulching. 7~10 days after sowing, after the first leaf of seedlings emerges, the membrane is broken and seedlings are released in time. It is best to put seedlings in windless sunny days, do not put seedlings in hot weather or strong wind cooling days. The method of putting seedlings is to cut 1~2 cm holes in the plastic film above the seedlings with a knife, bamboo or iron wire hook, etc., lead the seedlings out of the film, and then seal the holes along the base of the seedlings with fine wet soil. Mulched corn grows fast in early stage, has large vegetative body and consumes more nutrients. In order to prevent possible lack of fertilizer and premature aging in late stage, topdressing in middle stage is very important. Future field management, such as pest control, artificial emasculation and auxiliary pollination, should be carried out earlier according to the growth period of maize. After corn harvest, timely pick up the waste film clean, centralized treatment. Click for more corn growing technology Click for more food crop growing technology