Potatoes are one of the important winter crops in our city. In recent years, early-maturing and high-yielding cultivation techniques such as mulching films have been applied to greatly increase the yield and benefits. The main cultivation techniques are as follows: 1. Select high-quality, early-maturing, high-yielding and good-quality seeds: The varieties with early potato tuber, uniform tuber, and good quality should be selected, such as the Heilongjiang early maturing varieties “Kexin No. 4†and “Dongnong 303â€. 2, timely early sowing, reasonable close planting: plastic film cultivation in late January sowing is appropriate, double film coverage can be appropriate early, choose sunny sowing, 4500-5000 per mu. Promote germination sowing, germination time is 15-20 days before sowing, until the buds grow 1-2 cm when cutting, each piece of 20-25 grams, with 1-2 buds, after wound healing can be the next species. 3. Apply base fertilizer and increase phosphorus and potassium fertilizers: The cultivation of plastic film requires base fertilizer to account for more than 95% of the total amount of fertilizer. Basal fertilizer is mainly organic fertilizer. It is best to use decomposed pig manure and chicken manure to increase soil temperature and apply more potassium fertilizer. , Note that seed potatoes do not come into direct contact with the fertilizer. In the late stage of growth, foliar spray of 1-2 "potassium dihydrogen phosphates" and "Green Fenwei" can be sprayed, and paclobutrazol can also be sprayed at the time of seal line. 4, plastic film coverage, meticulous management: plastic film covered with significant insulation, moisturizing, fertilizer conservation, to maintain the effect of loose soil. The main points are: 1 Determine the width of the diaphragm by 80-85% of the width of the film. 2 meticulous soil preparation, to reach the loess soil loose soil, lotus root into a round shape, the whole growth period requires fertilizer as a base fertilizer once applied. 3 Before sowing, after spraying, the selective pre-emergence herbicides such as “acetochlor†and “prometryn†were sprayed, and the concentration was slightly lower than that of open field cultivation. 4 cover film to be flattened and compacted, and the edges of the membrane are compacted with mud. Before covering the mulch, the soil should be moistened to facilitate emergence and herbicide herbicides. 5 3-4 days after emergence, open the hole to break the membrane and put the seedlings, then use a small mud to seal the hole.
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