Key points of cultivation techniques of spring peanut

1. Fine soil preparation and adequate base fertilizer spring peanuts should choose sandy soil with high soil fertility and convenient drainage and irrigation. 150 piculs of high quality farm manure, 100 jin of compound fertilizer and 2 jin of boron fertilizer should be applied per mu. After ploughing and raking, the width of the box is 5. 2 feet, ditch depth 0. 6-foot trench, so that the three trenches are connected. Second, the selection of high-yield and stable varieties should have strong resistance, short growth period, suitable for close planting, high and stable yield, and a yield of 300m / m ~ 350kg. Third, timely dry sowing and reasonable close planting and seed treatment before sowing, seed dressing with 25 grams of ammonium molybdate or 50 grams of peanut rhizobia per mu can increase production by 10-15%. Seed dressing should be done on the same day and sowing on the same day. 4. according to the law of peanut fertilizer requirement and soil quality and soil nutrient content, peanut special fertilizer should be applied, which can increase the yield by more than 10% compared with conventional fertilizer after fertilization at seedling stage and early flowering stage. Spraying 0.3% borax solution in the peanut stage and 0.4% potassium dihydrogen phosphate solution in the fruiting period could increase the yield by 913%. Fifth, vigorously promote plastic film mulching and chemical weeding, promote early flowering and needle bearing, increase the full fruit rate and increase the weight of 100 kernels. At the same time, it can shorten the growth period and create favorable conditions for the second high yield. Spring sowing plastic film peanuts use plastic film 6 kg per mu. Before laying the film, use four taels of "pull cable" or "du er" herbicide with 50 kg of water to control weeds. After spraying, cover the plastic film to protect the topsoil layer containing herbicides. Sixth, strengthen field management to prevent and control diseases and insect pests, break the film and expose seedlings in time, and check seedlings and replant. When the cotyledons are spreading, the membrane should be broken manually in time to prevent the seedlings from burning at high temperature, and it is appropriate for large cotyledons with holes to grow out of the ground. Replant the fields without seedlings and broken ridges in time. Timely ploughing and weeding, clearing ditches and draining after rain, maintaining soil permeability and increasing soil temperature are conducive to the early formation of rhizobium and the early development of strong seedlings. Ralstonia solanacearum, which is rich in peanuts, can be controlled with 40% carbendazim 500 times or chlorothalonil 600 Mel 800 times. Pick the main stem manually in the rosette stage and cut off the main stem of more than two pairs of lateral vines with a sharp blade.