Preparation before sowing: 1. Promote germination. Seed volume: 150-180 kg / mu, paved with brick or wood cubes on the outdoor ground, and covered with canvas or straw curtains. Prepare potatoes 2 weeks before sowing. Indoors can be used for seed germination, the thickness is 3-4 layers, the temperature is maintained at 15-20 degrees, and it is turned once every 3-5 days. The seed length is 0.5-1.0 cm for seed cutting. Replay later. 2. Cut into pieces. 40-60 grams of potato chips are generally recommended. Sowing: When the ground temperature of 15 cm depth in the soil is maintained above 7 ° C for 3 days, it can be sown. Site preparation: It is advisable to open the trench to a depth of 12-15 cm. The seeding depth depends on the type of soil: 8-12 cm, which is the height of the potato block from the ridge. Sowing density: seed potato: the number of seeded plants is about 4,500 per acre; commercial potato: the number of seeded plants is about 3,300 per acre. Cultivation management: 1. Cultivation and soil cultivation: When cultivating the tops of young shoots, carry out one-time cultivation, shallow cultivation, shovel in time after the seedlings are raised, raise the ground temperature with less cultivation, shovel once during the growing period, and make two cultivations. Requirement of time for tilling: the third time of tilling and weeding with potato seedlings and budding stage combined with potato topdressing. 2. Weeding: After cultivating, spray with Jinduer + Sek. Spraying period: after emergence, the weeds were sprayed with Sec + Essence before 2-3 leaves. 3. Fertilization: During the lifetime, the fertilizer requirement at the seedling stage is less, accounting for about 25% of the total fertilizer requirement during the whole growth period, and the tuber formation to the tuber growth stage requires the most fertilizer, which accounts for more than 50% of the total fertilizer requirement during the whole growth period. During the starch accumulation period, the fertilizer requirement decreased again, accounting for about 25% of the total fertilizer requirement during the full growth period. Therefore, combined with the application of sufficient base fertilizer on cultivated land, the amount of nitrogen application accounts for about 80% of the total nutrients required during the full growth period, and all of the phosphorus and potassium. The base fertilizer should be mainly rotten farmhouse fertilizer, and the application rate per mu is 1-2 tons based on pure manure. When the base fertilizer is insufficient, it is concentratedly applied into the sowing ditch. When the seedlings grow to 20 cm, 25 kg of ammonium carbonate and 25 kg of superphosphate are poured on water per acre. 60 kg of 0.2% potassium dihydrogen phosphate solution was sprayed per acre during the tuber expansion period, spraying 2-3 times. 4. Water management: Each kilogram of dry matter produced by potato plants consumes about 708 liters of water. In the sandy soil, 1046-1228 liters of water are required. 75% of the potato root system is about 45 cm deep. Capacity The available water in the field should be about 75%, especially during the tuber formation and expansion period, the available water in the field must be maintained at 70% -80%. Disclaimer: Some articles on this website are transferred from the Internet. If you have third party legal rights, please inform this website to deal with them. phone Frozen Pud Red Shrimp,Red Shrimp,Frozen Shrimp,Melantho Shrimp Zhoushan Haiwang Seafood Co., Ltd. , https://www.haiwangseafoods.com