Plastic Film cultivation can increase yield Management points of plastic Film mulched Spring Maize

The cultivation of spring maize with plastic film mulching has the functions of increasing temperature, preserving soil moisture, preserving fertilizer, preserving whole seedlings, inhibiting the growth of weeds, reducing insect pests, promoting the growth and development of maize, early maturing and increasing yield. The key to the application of this technology is to strengthen field management, and several key points should be done:

Breaking membrane and releasing seedlings of Maize

1. Check the plastic film frequently. After sowing with plastic film, you should often check the plastic film and find that there is a damaged ventilation place, seal it with soil in time to prevent air leakage, cool down and run away moisture.

2. Breaking the membrane and releasing seedlings in time. The inspection was carried out 7-10 days after sowing, and it was found that after the corn seedlings were basically released, the seedlings should be released early or late in sunny days, preferably in cloudy days and not in windy days, requiring magnification not small, green not yellow, and timely membrane breaking. After releasing the seedlings, the seedling eyes should be sealed with wet soil in time.

3. Time and seedling setting. When the 3-4 leaves of maize seedlings are fully unfolded, the seedlings can be interleaved, and the late corn crowds shade each other and compete for nutrients. Complete the seedling setting at 5-6 leaves, and master to remove the seedlings, keep the seedlings evenly, keep all the seedlings, and keep the strong seedlings. Two seedlings can be retained to make up for the lack of seedlings, or soil blocks can be used for water transplanting to ensure that there are 45005000 seedlings per mu of compact corn and 3200003500 seedlings per mu of spreading leaves.

4. Squatting seedlings and breaking tillers. Squatting seedlings refers to fertile soil layer, sufficient bottom fertilizer and soil moisture to prevent seedling growth, control moisture, facilitate root system binding, squat seedlings should squat green not squat yellow, squat fertilizer do not squat, squat wet do not squat dry. Before and after jointing, maize plants protrude into tillers based on the axillary buds of leaf axils, which can not bear ears and consume nutrients in vain. They break off tillers in sunny weather to facilitate wound healing and reduce disease infection.

5. Scientific topdressing. According to the situation of seedlings, the technique of soil testing and formula fertilization was adopted to apply 15kg urea per mu when maize leaves were 6 to 9 leaves, so as to ensure the need of nitrogen fertilizer for maize at seedling stage. In the period of big trumpet mouth of maize, 20kg urea was applied per mu as ear fertilizer, deep topdressing on ridge side and topdressing depth 8~10cm.

6. comprehensive prevention and control of diseases and insect pests. The main diseases and insect pests of corn during the growing period are corn big spot, small leaf spot, corn borer, rust, aphids and so on. Timely and appropriate control can be made according to the occurrence of corn diseases and insect pests.

7. Remove the waste film in time and harvest it in time. After corn harvest, the waste plastic film in the field should be removed in time to protect the farmland ecological environment and purify the soil.