Cultivation techniques of Potato in Winter

1. Preparation before sowing: in mid-February, prepare agricultural materials such as seed potatoes, pesticides, chemical fertilizers and agricultural films. Put the seed potatoes in the room at about 12 degrees Celsius to sprout.

2. Cut a good seed potato: make sure that each seed potato has at least 1 color 2 bud eyes and weighs about 30 grams. The chopped seed potato pieces were mixed with medicine. The formula of the powder is to add 250 grams of 70% methyl topiramate wettable powder with 50 kg of fossil powder.

3. timely early sowing: generally sowing from late January to early February, with row spacing of 90 cm, plant spacing of 12 cm, sowing amount of 150kg per mu, and planting density of 5000 to 5200 plants per mu. Apply foot fertilizer per mu: 50 kg of potassium sulfate compound fertilizer, 20 kg of potassium sulfate and 20 kg of urea. Cover the film in time after sowing.

4. Field management:

(1) timely film matting. Potatoes usually start to emerge 30 days after sowing. At this time, special personnel should be sent to inspect the seedlings in the field and find that the covered agricultural film will be scratched in time when the seedlings are unearthed. If the film is not scratched in time, it is easy to cause the seedlings in the film to burn due to high temperature. Take off all the agricultural film in time after about 80% of the seedlings in the whole field are unearthed.

(2) cultivate the soil by ploughing. After emergence, the potato is ploughed for the first time when it grows to about 8mi 10cm. The most suitable height of soil cultivation is 4ml / 5cm of exposed seedlings. In the budding stage, the second interploughing was carried out.

(3) topdressing and watering. In the first intertillage, 20 kg of ammonium sulfate was applied per mu. In addition, seedling protection water, budding water and potato swelling water should be poured in time.

(4) timely prevention and control of diseases and insect pests. In the middle and last ten days of April, the underground pests were controlled in time, and downy mildew was sprayed to prevent potato late blight. Timely control of aphids from the end of May to the beginning of June.