Early spring potato cultivation methods include two small membranes covered with plastic sheds, thick sheds and mulching. Potatoes cultivated in these ways can be marketed 10 to 20 days earlier than conventional open-field cultivated potatoes. Regardless of the type of cover used for selection of improved varieties, the Dongnong 303 or Kexin No. 4 original species transferred from the northeast must be used. Self-retained species cannot be used, and self-cultivation cannot be used for many years. The varieties are aging and the species is severely degraded. Species. About 150 kilograms are used for the mu. Large potatoes can be cut and sowed. Each seed potato weighs 20 to 25 grams and 2 to 3 shoots. It is inconvenient to apply base fertilizer after applying the film, and the fertilizer should be applied before the film is coated. When ploughing, Mu uses 50 kg of sulfur-containing compound fertilizer (15% nitrogen, phosphorus, and potassium) to spread. After the soil preparation, the farmer organic fertilizer such as livestock manure or human excreta is more than 30, and the hole is deeper and larger. First use human excrement to acupuncture, then apply a pair of livestock manure, and then cover with a layer of soil to avoid direct contact of seed potatoes and fertilizers, affecting emergence. The rest of the fertilizer can be applied between the rows and then covered with soil so that the fertilizer can be continuously supplied, and no fertilizer is required afterwards. Chemical weeding shall be carried out before cover filming after chemical weeding and sowing of cover to prevent weeding. Mu 50% acetochlor 75 ml to 100 ml fine spray on the water field. When spraying, it is required that the soil be moist and the fields should be flat in order to enhance the weeding effect. Cover the thin nylon film carefully, cover with soil, and ensure that the seal does not leak before emergence. After emergence, the mulching film should be broken in time and the seedlings should be sealed with mud in order to increase the soil temperature. Covered by arch sheds, it should be ventilated and ventilated when exposed to high temperatures in sunny weather to prevent high temperatures from burning seedlings. Chemically regulate the potato from the initial flowering stage to the full flowering stage, with 30 ml Uniconazole water 48 kilograms evenly sprayed on the plants, can play a role in enhancing plant resistance, reducing disease, prevent leggy, early maturation and increase production. Generally can increase production by 10% to 15%. Diseases during the growth of disease-resistant pests and potatoes are mainly caused by late blight. When sporadic diseased plants are discovered, they should be removed in time. Then, Tiantian is sprayed with 25% of Rhodiola and 800 times of spray. Pests are mainly 28-star ladybugs and aphids. The 28-spot ladybug can be sprayed with 80% dichlorvos 500 times, and the aphid can be sprayed with 10% imidacloprid 2000 times.
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