Variety selection. For the cultivation of fresh vegetables, early and middle-maturing varieties should be selected, such as Feiwuruiting, Dongnong 303, Zhongshu No.3, etc., and they are generally marketed in mid-to-late April. For cultivation for processing, the Atlantic Ocean should be chosen and harvested generally in mid-May. Seed selection. Virus seed potatoes within 3 generations should be used. Seed treatment. Small seed potatoes (50 g or less) are generally not diced and whole potatoes sown; large seed potatoes (50 g or more) should be cut. When cutting, it should be cut longitudinally or beveled. Each cut should contain 1-2 buds with an average weight of 30 grams or more. Cuts should be wedge-shaped, not strips or sheets. In the process of cutting, we must pay attention to the disinfection of the cutting knife. Generally, soak two knives in a 1% potassium permanganate solution. After using one knife to cut a seed potato, immerse the knife in potassium permanganate solution. Take another knife and cut a seed potato, alternately. When cutting, apical tubers and lateral tubers should be stacked separately and sown separately so that the seedlings are neat. The diced tubers were uniformly dressed with grass ash or talcum powder (add 4% to 8% thiophanate-methyl or carbendazim) to promote wound healing. Soil selection. Should choose convenient drainage of rice fields. Spread base fertilizer. Before the ditching, 100 kg of potassium sulfate compound fertilizer was applied per acre of rice field. Put sowing potatoes. Potatoes are generally sown in late December and early January. First in the Tanaka width of 150 cm wide, 40 cm wide groove row, and then placed on the surface of the potato crops, each planted sowing 4 rows, spacing 40 cm, spacing 25 cm, rice field per acre put 5500 sowing potatoes. Ditching. In the ditch between the eaves and the ditch, the ditch depth of 25 cm, the width of 30 to 40 cm, the open trench dug up the soil after the whole pieces will be covered. Cover straw and mulch. Comparing the straw tails and tails, the head is covered on the side of the bowl with a thickness of 8 to 10 cm, and a grass amount of 1000 to 1200 kg per mu. Then, after the rain or after wetting the rice straw, the surface of the rice straw was covered with a plastic film. The width of the film was 220 cm, and the soil was tightly pressed around it. Broken membrane induced seedlings. When the seedlings begin to grow grass, they should break the mulch at the emergence site and lead to seedlings. Plant regulation. If the potato plant grows mad, the use of uniconazole leaf spray, the use of a concentration of 100 to 150 mg / kg, can effectively inhibit the growth of plant shoots, and promote the expansion of the tuber under the plant. Pest control. The main diseases of potato include early blight, late blight, and black shank. Insect pests mainly include aphids, 28-spot ladybugs, and underground pests. We must pay close attention to prevention and control. Timely harvest. From late April to early May, according to market conditions, the market will be gradually harvested. When harvesting, you only need to open the straw and potatoes.
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