Grape interplanting autumn potato cultivation techniques are particular about
Before the planting, the soil is deep-turned and deep-sown. The depth of ploughing is 20-30 cm. In the large row, 1 m is used as a rake, and the soil is finely crushed and the screed is leveled.
The use of improved varieties, timely sowing autumn potato growth period is short, generally about 120 days, high yield, good disease resistance, should be based on cooperation 88. The best season for autumn potato planting is from late August to early September.
Seeds of potato chips cut into 40-50 g and 1-2 pieces of potato chips in 1-2 days before sowing. If cutting into diseased potato, soak the knife in 0.5% potassium permanganate solution for a few seconds. Continue. Cuts are sterilized with plant ash. If the whole potato sowing does not require disinfection.
Reasonable dense planting, applying enough base fertilizer to plant seeding, planting specifications: spacing 0.30.3 meters, about 1700 sowing per acre. The seeding rate is determined by the size of the seed potato, which generally requires 90-100 kilograms per acre.
After the autumn potato covers the rice straw, it is difficult to topdress and the base fertilizer should be applied. In general, the application of organic fertilizer is 1000-1500kg, 45% of nitrogen, phosphorus and potassium three-element compound fertilizer is 40kg, 40g of general calcium or 40kg of compound fertilizer, 30g of superphosphate. The organic fertilizer is applied to the potato sowing belt, and the fertilizer is applied between the potatoes and leaves about 5 cm from the seed block. After the emergence of weak seedlings can use fertilizer or pig manure 5 kg of urea topdressing, under normal circumstances do not topdressing.
Straw-covered straw-covered cultivated autumn potatoes are generally prepared with 1.5 kg of straw per acre of potatoes. After the potato has been sown and fertilized, straw prepared in advance is used. The tip of the grass uniformly covers the entire surface of the crop with a thickness of 10 cm. Straw on.
Field management Potatoes are sensitive to moisture, and their water requirements are characterized by less early stage, more period of tuber swelling, and less after. Therefore, after sowing, if the dry topsoil appears white, it is necessary to water in time to keep the soil moist and ensure the whole seedlings.
Diseases and pests control The main disease of potato is late blight; the main pests are ground tigers and tuber moths, cockroaches and yellow ants. Prevention and control of pests and diseases is based on "prevention-based, comprehensive prevention and control," and prevention of disease and re-treatment of insect pests. 1. Control of tigers, earthworms, yellow ants, etc. When sowing, use 3% phoxim particles 3-4 kilograms of mixed soil or fine sand to spread in the sowing ditch. 2. In late and late period, the main prevention and treatment of late blight, with 72.2% Prec 1000 times, 72% Kelu 800 times or 25% metalaxyl spray every 7-10 days, continuous 4-5 times the bottom, surface uniform spray Shi.
Harvest When the potato stems and leaves turn yellow and the base leaves fall off, they can be harvested.
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