Potato is one of the important winter crops in our city. In recent years, early-maturing and high-yield cultivation techniques such as mulching have been applied to greatly increase the yield and efficiency. The main technical points of cultivation are:
1. Selection of high-quality early-maturing and high-yield varieties: varieties with early potato, uniform potato and good quality, such as Heilongjiang early-maturing varieties “Kingxin No.4†and “Dongnong 303â€.
2, timely early sowing, reasonable close planting: mulching cultivation is appropriate in late January, double film coverage can be appropriate early, choose sunny sowing, 4500-5000 per acre. Advocate germination sowing, germination time is 15-20 days before sowing, when the bud length is 1-2 cm, dicing, each piece 20-25 grams, with 1-2 buds, can be planted after the wound is healed.
3, the application of base fertilizer, increase the application of phosphorus and potassium fertilizer: the cultivation of plastic film requires more than 95% of the total fertilization amount, the base fertilizer is mainly organic fertilizer, it is best to use the decomposed pig manure, chicken manure, etc. to increase soil temperature, apply more potash Note that the seed potato should not be in direct contact with the fertilizer. In the later stage of growth, foliar fertilizers such as “potassium dihydrogen phosphate†and “green Fenwei†can be sprayed on the foliar surface, and paclobutrazol can also be sprayed at the time of sealing, and the effect of increasing the yield is obvious.
4, plastic film cover, meticulous management: the film cover has significant insulation, moisturizing, fertilizer, and maintain the effect of loose soil. The main points are: 1 Determine the width of the ridge according to 80-85% of the width of the mulch film. 2 Carefully tidying up the soil, reaching the fine soil pine of the flat soil, and smashing into a circular arc shape, and the fertilizer is applied as a base fertilizer at the whole growth period. 3 After sowing, spray the selective pre-emergence herbicides such as acetochlor and chlorpyrifos before the cover film, and the concentration is slightly lower than that of the open field cultivation. 4 Cover the mulch film to be flattened and compacted, and the surrounding film edge is compacted with mud. Before covering the mulch, the soil should be moistened to facilitate emergence and herbicide weeding. 5 3 to 4 days after emergence, open the small hole to break the membrane and put the seedlings, and then seal the small holes with fine mud.
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