Film mulching cultivation of Spring Potato

When cultivating spring potato, selecting varieties, applying sufficient fertilizer, sowing at the right time, controlling diseases and insect pests, etc., can obtain a yield of 2000 kilograms per mu, and the commodity rate is more than 80 percent.

Virus-free seed potato is the best choice for selected varieties, such as Zhengshu 6, Dongnong 303, Jinyan 8, Zhongshu 3 and other varieties with early maturity and strong disease resistance.

Select the stubble and choose the semi-acidic sandy soil with deep soil layer and loose and fertile soil to plant. The previous crop should be Liliaceae, Cucurbitaceae vegetables, rice and soybeans, and try to avoid planting in the previous crop of eggplant fruits and peanuts, so as to reduce scab, cancer and the harm of golden needle insects and grubs.

The production of 1000 kg of potato requires 5 kg of pure nitrogen, 2 kg of phosphorus pentoxide and 11 kg of potassium oxide. The yield per mu is more than 2000 kg, and each mu needs to apply 2000 kg of rotten organic fertilizer, 10 kg of urea, 70 kg of sulfur-based compound fertilizer and 15 kg of potassium sulfate. If cultivated with plastic film mulching, the above fertilizers can be used as base fertilizers at one time.

20-25 days before sprouting, the seed potato is cut into pieces, the weight of the potato is about 40 grams, each potato has 1 sprout eye, and soak the seeds with 25% carbendazim 500 times solution for 10 minutes, remove and dry, pile the potato pieces in the leeward and sunny place after air-drying, pile 60-80 cm high, cover with 10 cm thick rice straw, and then cover with a layer of plastic film, sealed around the film. Sow seeds when buds are 0.5 cm long.

The suitable time for early sowing and film mulching cultivation is from late January to early February, and the open field cultivation can be postponed to the middle of February. Ten days before sowing, organic fertilizer, urea and potash fertilizer were spread and ploughed, and then compound fertilizer was applied to make ridges, with a ridge distance of 85 cm and a ridge height of 30 cm. Choose sunny sowing, sowing depth of more than 10 cm, seed consumption of 180,200kg per mu, basic seedlings of about 4500. After sowing, 100 ml of 50% Acetochlor per mu or 33% of field supplement 100 ml, 50 kg of water spray, 30 minutes after spraying film.

After properly pruning the seedlings, each plant leaves a strong main stem to grow, except for the plants on both sides of the plant, in order to increase the yield and increase the commodity rate.

The main diseases to control diseases and pests are late blight, black shank, scab and so on. Disease-resistant varieties and crop rotation should be selected for prevention. The main pests are grubs, ground tigers, aphids and so on. To control grubs, sprinkle 1.8 kg per mu with 3% insecticidal per mu before sowing; before budding in early April, use 50% phoxim 300 ml plus water 1500 kg 2000 kg per mu to water one by one. To control aphids, spray 15 grams of imidacloprid and 50 kilograms of water per mu from late April to early May, and use it again after 70 days.