Key points of potato cultivation techniques in large ridge

The technique of large ridge cultivation of potato is a comprehensive cultivation method of selecting virus-free seed potato 180kg/ ha, using 80~90cm big ridge cultivation, deep pine 30cm, changing single-layer potato into multi-layer dispersed potato, mixed application of agricultural fertilizer and chemical fertilizer, chemical control of diseases and insect pests, chemical weeding and artificial weeding.

1. Virus-free seed Shu Kexin 13 or Kexin 18 was selected for seed treatment. 30-40 days before sowing, put the seed potato out of the cellar and store it in a place above 10 ℃ to release the dormancy, trap the seed and accelerate germination. At the same time, select sick and rotten potatoes. 5-7 days before sowing, when the seed bud begins to germinate, cut the seed potato, prepare disinfectant (500 times liquid potassium permanganate, or 95% alcohol) and blade, when cutting the diseased potato, one is to eliminate the diseased potato, and the other is to immediately disinfect the blade. Soak in disinfectant for 3-5 seconds. The cut potato pieces are generally about 25g, and there are 1 to 2 bud holes in each piece. After cutting the potato pieces, the height of the pile can not exceed 20cm, the temperature is controlled at about 20 ℃, and the relative humidity is 85%.

2. Select the land with flat terrain, leeward to the sun, no stagnant water and good drainage.

3. Select stubble (1) corn stubble and Gramineae crops are the best, and (2) bean stubble is the second. (potatoes cannot be planted in plots where chlorosulfuron, micosalicylic acid, Pushite or two mixtures have been applied); (3) vegetable stubble, except cruciferae and eggplant fruits.

4. Soil preparation and deep ploughing of 30cm, application of farm manure 10000kg/ ha, and wide ridges of 80~90cm.

5. Fertilizing not only farm manure, but also urea 241kg/ hectare, diammonium 234kg/ hectare and potassium sulfate 560kg/ hectare.

6. Sowing can be done when the soil temperature is stable at 6-7 ℃. In Suileng County, it is the end of April and the beginning of May.

7. the cultivation density is 6.5 ~ 72000 plants per hectare.

8. Chemical weeding 99% Acetochlor 1500mil/ ha, or 70% Sekejin 600g/ ha, mixed with water 450kg, evenly sprayed 5-7 days after sowing, closed weeding.

9. Field management (1) before sowing seedlings, depending on the weather conditions, after covering the soil, it is necessary to cover the soil below; when the soil is too shallow and there is a cold current, drip a plough to cover the soil; (2) inspect the fields to replenish the seedlings. After emergence, it is found that there is a lack of seedlings, and make up the seedlings in time. (after sowing, the remaining seed potato blocks are buried in the ground as backup seedlings); (3) artificial weeding. Weeds are found to be artificially weeded in time; (4) subsoiling. Loosen the ridges and furrows in time before flowering, but do not go to the ridges as far as possible; (5) disease prevention. 5-7 days after flowering, the aboveground growth was controlled and Daizhuangsu was sprayed. At the same time, 72% DuPont Kelou or 72% Jinlei 500g were sprayed to prevent potato late blight; (6) insect control. Underground pests, mix 40~50kg/ hectares with 5% nail; aphids, use imidacloprid or mites to control 230g/ hectares when aphids occur; ladybugs, when ladybugs occur, spray with dichlorvos, Skynet, and death-bound 500mil.

10. Harvest the upper part of the plant at the right time when it begins to wilt, start harvesting, not too late.