First, choose fertile soil, deep soil, loose, good air permeability, slightly acidic sandy loam, soil with irrigation and drainage facilities, and former crops without soil of solanaceous crops or potatoes participating in rotation.
Second, soil preparation and fertilization should be carried out before the sowing and cultivating. The plough depth should reach 20 cm. Combine turning ground with 2,000 kg/mu of organic fertilizer. According to the local soil conditions, more than 20 kilograms of compound fertilizer (nitrogen, phosphorus, potassium ratio of 1:0.5:2) was applied to meet the fertilizer demand of the potato during the whole growth period.
Third, germination 30-40 days before sowing germination, first planted pitted potatoes, strict selection of seed potato, remove bad potatoes. The seed potatoes are sown in the scattered light and kept at 15-20°C. After the short shoots are directly picked up, the seeds are sown. No matter whether it is sown in whole or in pieces, the germination should be carried out before sowing to ensure the whole seedlings. Promote premature, increase production and income.
Fourth, timely sowing timely sowing refers to the soil 10 cm deep when the ground temperature reaches 7-8 °C sowing.
1. Promote planting with small whole potatoes to increase the number of tubers and achieve high yields.
2, cut the potato cuts can not be too small, generally should be about 30 grams, divided the top buds, give full play to the advantages of the top buds. To disinfect the knife, prepare 2-3 knives and put it in a 75% alcohol or 0.2% potassium permanganate disinfecting solution. When you cut the diseased potato, use a disinfected knife to reduce the disease. spread.
3, seed dressing with ash and chlorothalonil and other fungicides for seed dressing, prompting the cutting of the knife's knife as soon as possible to heal, reduce the bad species, increase potassium, prevent disease.
4, sowing according to seed potato size, land temperature and humidity, land texture and other factors determined, general sowing depth of about 10 centimeters, after the suppression of soil, soil thickness of 15 cm or less.
5, the density according to the type of species, natural conditions, seeding and other factors to determine, generally 4500-5000 strains / mu is appropriate.
6. When pest control sowing, it will be sprayed into the ground and kill granules 4 kg/mu to prevent underground pests such as tigers and earthworms.
7. Pre-emergence weed control can use dole or acetochlor 150 ml/mu. Spray within one week after sowing.
V. Field Management
1. Timely cultivating soil The first cultivating soil should be carried out about 30 days after sowing, mainly in loose soil, and combined with topdressing at the same time if necessary. The second time the seedlings are carried out up to 15-20 cm.
2, coated potato. Immediately after emergence, the seedlings should be broken and the membranes should be placed. The membranes should be sealed with soil. When the seedling height is 10 cm, the membranes are removed and the soil is cultivated for the first time. Weeding and loose soil are the main factors, and a small amount of soil is applied to the roots.
3, timely irrigation and drainage.
4, control plant leggy (1) control through cultivation measures, can be appropriate to reduce the amount of nitrogen fertilizer, increase the amount of phosphorus, potassium fertilizer. (2) spray plant growth regulator - paclobutrazol.
5. Pest Control Aphids and 28 Ladybirds can be sprayed with agents such as tiger stalks; prevention of fungal diseases such as early and late blights can alternately use 100 g/mu for Dasheng, and 100 g/mu for antivirus.
6, timely harvest According to the growth and market demand and output value, weather conditions timely harvest, after harvest to prevent the sun for a long time and turn green.
The Netherlands 15 virus-free potatoes, the average individual weight 0.5 kg, mu yield up to 5,000 kilos.
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