First, the varieties of virus-free potatoes suitable for planting in Shandong Province are selected from the following categories: Feiwurei (Netherlands No.7, The Netherlands No.15), Luyin No.1, Jinyin No.8, and Dongnong 303, which are suitable for planting in open fields. In addition, it can be cultivated in protected land and is currently a better early maturing variety. Concentrated potato, large potato block, high yield, and good commercial quality. Second, cutting germination and germination sowing is an effective measure to increase production, can make potato seedlings, seedlings, seedlings strong, increase production. Germination should be carried out 15 to 20 days before sowing. In general, 50 seeds per kilogram of seed can be cut, and at least 1 eye is required for each cut. The weight of the block is about 25 grams. When cutting, the apical dominance is fully utilized. Ensure that the seedlings are neat, and special attention should be paid to eliminating hybrids or diseased potatoes. Dicers should be soaked with 100 times solution of Yingtian No. 2 multifunctional biological agent for 10 minutes and then removed. After the cuts of the cut pieces are allowed to dry and heal, piles are germinated at 15~20°C or germinated in Yangshao with leeward sunshine, usually every time. Square meters can be stacked about 50 kilograms, cover the plastic film to facilitate warming and moisturizing, increased light during the day, covered with haystacks at night. Third, timely sowing temperature stability by 7 °C (usually in early March) can be sown. The suitable sowing period in Shandong Province is: the mulch film covers 7-8 days before the “convulsionsâ€; the mulch + single-story arch shed covers “rainwater†before and after; the double shed can be planted before and after “establishing spring†in advance. If you have a lack of lyricism, you must do it before you broadcast. Generally, the planting density is 4800 plants/mu (7020 cm) or 5000 plants/mu (6520 cm). The market should be denser in the protected area and thinner in the open area at night. The sowing method is to open the ditch by row spacing, combine the application of fertilizer, and cover the earth after sowing. The depth of sowing is about 8 cm. The distance between the cuttings and the top of the dome is 12 to 17 cm. The overburden is too shallow. The tuber will be exposed to blue and affect the quality. If the soil is too deep, the emergence will be delayed and the yield will be affected. Protected growers shall cover and seal tightly on the day of sowing. Those covered by large, medium and small arch shelters shall be allowed to pressurize the film line on the surface of the shelter and be ventilated, ventilated, top-dressed and watered at any time. Covering the mulching film, after sowing, the soil is earthworms, flattened the surface, sprayed with herbicides, and then covered with plastic film. 4. Rational fertilization Potatoes are high-yielding, fertile crops that are very sensitive to fertilizers. The production of 1000 kilograms of potato blocks requires absorption of 5 kg of pure nitrogen, 2 kg of phosphorus, and 10 kg of potassium from the soil. The ratio of the three is 1:0.5:1.5. Potassium can increase plant disease resistance and promote the expansion of tubers. Fertilization should be based on organic fertilizer (soil manure) as a base fertilizer, both to improve the soil, but also for a steady stream of potatoes to absorb and use. In general, 500 kilograms of Suichang soybean meal organic fertilizer is applied per acre in the sowing ditch at the time of sowing, and 100 kg or more of high-quality compound fertilizer is applied at the same time. When applying chemical fertilizer, potassium chloride should not be applied. Early-maturing varieties should not be top-dressed and should be given at one time when sowing. Fast Shipping Laser Distance Sensor Hi there, Fast Shipping Laser Distance Sensor,Serial Laser Distance Sensors,USB Laser Distance Sensors,RS232 Laser Distance Sensors Chengdu JRT Meter Technology Co., Ltd , https://www.cdtoflidarsensor.com
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