1. Selecting detoxified seeds for planting with detoxified seeds is the basis and guarantee for high yield and high efficiency of potatoes. The detoxified potato emerges early, grows vigorously, the leaves are rich in green, the roots are developed, and the resistance is strong, which is more than 50% higher than that of the undetoxified seed potatoes. For early maturity, you can use early white, Dongnong 303, etc.; both early maturity and high yield, can choose Lu Yin No. 1, Jin Yin 8 and other varieties.
2, prepare the arch shed to produce potato intensive cultivation, high seeding density, large amount of seeds, about 150 kg per 667 square meters, seed potatoes from the northeast can be stored in 10 - 15 ° C environment. At the same time, remove sick, rotten and deformed potato pieces.
3, dicing germination according to 40-50 pieces per kg of dicing. If there is a diseased potato, it can be disinfected with 75% alcohol. Sorting and germination according to the upper, middle and lower parts of the seed potato. The temperature of the germination bed is 15-20 °C, the humidity of the bed soil (fine sand) is hand-held, and the landing is appropriate. The germination time is generally 25-30 days before the broadcast (Tengzhou is January 10-20). ), the germination method is one of the better indoor or cellar insulation, the second is the germination in the greenhouse, and the third is the impotence of the impotence. Dispensing method, the bottom is paved with 5 cm of fine sand, and the upper layer is 3-5 layers of potato chips. Each layer of the potato pieces is flushed, and 5 cm of bed soil is laid between the layers, and the top is covered with 5 cm thick bed. Soil, then add grass and heat insulation. When the potato buds are O.5 - 1 cm long, the potato pieces are removed and moved to a room or a greenhouse at 10-15 ° C. The buds are spread under scattered light to make them purple green buds.
4, sowing
1 fertilization of cultivated land. 667 square meters of high-quality soil mixed fertilizer 3000-5000 kg, pure potassium 25 kg, deep ploughing before winter, 翌 解 翌 解 解 解 解 解 解 解 解 解 解 解 解 解 解 解 解 解 解 解 解 解 解 解 解Double-row ridge planting, the ridge distance is 0.8 meters, of which the ridge width is 0.6 meters, the groove width is 0.22 meters, 2 rows per ridge, the plant spacing is 0.2-O.25 meters, and the 667 square meters is 6500- ― 8000 strains. Between the shed and the shed walk 0.5 m; 3 sowing time. Temperature above 3 °C, 10 cm above ground temperature 0 °C, large arch shed can be planted in early February, small arch shed in mid-to-late February, select no sunny days, cold current sowing, and the day to buckle shed; 4 seeding method. Use a large hoe to open a wide ditch at the top of the ridge, or use two small ditches of small shovel, and use the bucket to shovel and then sown in the angle. The distance between the two rows is 0.15-0.2 m. After the next seed, the fertilizer nitrogen is applied. Phosphorus and potassium each containing 15% potassium sulfate compound fertilizer 70 kg + urea 10 kg + boron fertilizer 0.5 kg + zinc fertilizer 1 kg / 667 m2, 10% phoxim powder granules before covering the soil 2 kg / 667 Square meters are sprinkled into the ditch to control underground pests, covering 0.1-0.15 meters of soil, the ridge top is made into a "concave" shape; 5 covers the mulch. Before spraying, sprayed with urethane and acetochlor herbicide, 60-80 ml per 667 square meters, then covered with 0.9 m wide mulch film, and tightly compacted around.
5, the shed shed small arch shed with four ridges as a shed, with thin bamboo poles, tip tying tight, arch height of 0.9 meters, shed width 3-3.2 meters, covered with 4 meters wide agricultural film. The 2m, 6m, and 8m wide agricultural film can cover 2 ridges, 6 ridges, and 8 ridges of potato sheds. In the middle of the 6 ridge and 8 ridge wide arch sheds, it is necessary to increase the column support. After the sowing, the shed will be buckled in time, and the four sides of the agricultural film will be compacted and solidified. The shed surface will be leveled as much as possible. A small wooden stake will be made every 1.5 meters on both sides of the shed, and the 14-piece wire or plastic laminating line will be used to hold the two sides of the wooden pile. Tight, to prevent wind from shacking.
6, fine management of the arch shed potato from sowing to emergence 20 days, from emergence to harvest 55-60 days; 1 temperature regulation. In the middle and late March, when the temperature reached 20 °C, the shed was ventilated and sealed at around 3 pm. In the first half of April, the film may be uncovered or fully uncovered at the discretion of the film. The potato is a hi-light crop. During the growth period, bamboo poles are often used to shoot the shed film, so that the water droplets on the membrane can be shaken off and light-transparent, and no drip film can be used; 3 fertilizer water management and pest control. Spray 0.2% potassium dihydrogen phosphate twice after the shed. After the emergence of the seedlings, the sapling period, and the capping, water is poured once. Keep the soil moist when the potato is inflated. Prevention and control of late blight should pay attention to reducing the humidity inside the shed and ventilation.
7, timely harvest of arched potatoes generally harvest from late April to early May.
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