How to grow a good spring potato
When the depth of 10 cm deep reaches 7-8°C, the sprouts of the tubers of spring potato can grow, and they can thrive at 10-12°C and break out quickly. This is a temperature indicator for sowing in various places. Wide adaptability of the potato, the general should choose the texture of loose, easy irrigation and easy drainage of the field, deep plowing 20-25 cm; do stilts, width 95 cm wide, 25 cm wide, 25 cm deep. One-time application of base fertilizer before planting, combined with soil preparation will be applied to the heart. Mu Shi decomposed organic fertilizer 1500-2000 kg, ternary compound fertilizer 15 kg, potassium sulfate 15 kg. For spring planting potato varieties, special early-ripening or early-maturing disease-free wound-killing species should be selected, such as Zhongshu No.2, Zaodaibai (shu-cuisque), Feiwulaiting, Zhengshu No.5 (mountain type), and Huangmazi (high Starch type), purple white, Atlantic (processing type) and so on. These varieties can be harvested 60-80 days after harvest, with a yield of 1500-2000 kg. Seed size 50-100 grams is appropriate. 10-15 days before sowing, if the seed potato has not passed dormancy, it will break the dormancy. There are two methods: one is to cut the seed potato into several pieces from the top, each piece has 1-2 buds, and the incision should be close to the buds. The second is soaking with gibberellin solution. Soaking and soaking in two kinds of potato soaking and dipping. The whole potato soaking can be soaked in a 10-20 mg/L gibberellin solution for 30 minutes; the cut soaking is immersed in a 5-10 mg/L gibberellin solution for 5-10 minutes. Preparation of gibberellin solution: The gibberellin can be dissolved in water with a small amount of alcohol or liquor, and 1 g of gibberellin is mixed with 100 kg of water, ie, a 10 mg/L gibberellin solution. Before soaking the gibberellin solution, clean the starch at the incision with clean water, remove the potato chips after soaking, and let it dry in the shade for 4-8 hours. Do not expose it to sunlight to avoid bad seeds. The gibberellin solution can be repeatedly soaked 4-5 times, but avoid excessive concentration, so as not to cause leggy. When germination, use cold beds, greenhouses or plastic greenhouses can be, the ground paved clean wet sand (in order to hand into a group, hand loose loose will be appropriate), thickness of about 10 cm, 1 m wide bed. Seeds of potato chips are washed, dried, and evenly spread on the seedbed (without overlapping). The shoots face upwards, and then the sand is used to cover the uncooked potatoes. Place 2-3 layers accordingly, and finally tighten the bed. During the germination, thin film insulation can be used to maintain the temperature at 25-28°C. It is better to keep the sandy soil moist and the surface sand not white. Shoots can be transplanted 1-2 cm long. Generally used wide and narrow rows of planting, large row spacing 80 cm, small row spacing 35-45 cm, hole spacing 18-20 cm, sowing depth of 7-9 cm, 5000-6000 acres of species. The soil must remain moist when transplanted. Can use a single film or film and small arch membrane "double membrane" covering cultivation, large and medium potato rate can be increased by 10-30%, there is a significant effect of increasing production, and can mention the city 10-20 days. Generally not watered before emergence. After the soil is formed after the rain, the earth should be ventilated in time. Qimiao chase after the application of tree fertilizer, mu urea 5 kilograms of water pouring or use of decomposing human fecal urine pouring. The hair stage is combined with cultivating shallow soil; the potato block enlargement period is combined with the clear ditch and the cultivating soil. In particular, it is necessary to pay attention to the use of straw in order to prevent it. At the same time, prevent the accumulation of water in the field, otherwise the tubers are perishable. If the spring potato is over-fertilized with nitrogen, it is prone to leggy. In the budding stage, 15% paclobutrazol wettable powder 15 grams, sprayed 45 kilograms of water, control the shoots long, conducive to multi-tubers. During the full bloom period, 0.2-0.3% potassium dihydrogen phosphate solution was sprayed with 50 kilograms to promote the expansion of the tubers. The main diseases of spring potato are late blight, which occurs when there is a lot of rain or before and after the flowering period. It should be sprayed as early as 25% of toxic mold or metalaxyl 800 times. The main insect pests are aphids and cockroaches. In the early stage of locust occurrence, 25% of water was sprayed with 2.5% deltamethrin for better results. Prevention of earthworms, can be used 90% crystal trichlorfon 0.5 kg dissolved in water, then sprayed on 35 kg of fine soil, mix well, become toxic soil, sprinkle in the ditch. Before and after the spring of May, potato harvest can be harvested in the late spring.
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