High-ridge sparse planting and High-yield cultivation techniques of Spring Maize

At present, many fine spring maize varieties need high ridge and sparse planting, but farmers generally use low ridge and close planting, which makes the good characters of corn can not be fully shown, which seriously affects the increase of farmers' income. Especially Dongdan 60, Sanbei 6, Dongdan 13 and Zunyan 1, the number of planted plants per mu can not exceed 3000, while farmers mostly plant more than 3000, or even reach 3500, resulting in a waste of land. In this paper, the cultivation techniques of high ridge, high yield and sparse planting of maize are introduced as follows: first, the varieties are selected, such as Dongdan 60, Sanbei 6, Dongdan 13, Zunyan 1, Lianyu 16 and so on. Second, get ready for the broadcast. Select seeds and determine suitable plots: mix seeds 10 kg with 50% phoxim 20 grams to 400 grams of water and stir evenly to control underground pests. two。 Fine ground preparation: the white land should be raked repeatedly during the Spring Festival, so as to preserve the soil moisture. The lack of soil moisture should be ditched 2-3 days in advance to make moisture, raked flat and waiting for sowing. Third, planting method 1. Before sowing, 3000 kg of high quality crude fertilizer and 15 kg of ternary compound fertilizer (16% N, 16% P, 16% K) were applied per mu; sowing early, sowing on May 20-25, sowing whole seedlings and weeding before budding. two。 On demand acupoints. The ridge height is 25 cm, the row spacing is 0.5 m, 2 seedlings are left in each hole, and the number of plants per mu is 2500 to 3000. 3. Three-leaf seedlings, six-leaf fixed seedlings, timely replenishment of seedlings. 4. Spraying corn Jindele once with 3 leaves and 11 leaves with 7 leaves can develop the root system, shorten the internodes and control the growth. 5. Apply jointing and booting fertilizer before and after heavy application of jointing and booting fertilizer, watering root and booting grouting water, ammonium sulfate 1015kg per mu in 4-6 leaf stage, artificial ploughing and weeding, 20-30kg urea per mu in 10-12 leaf stage, comprehensive pest control. In this period, 3% phoxim granules, 2kg / mu, sprinkled on heart leaves, to control corn borer, 50% phoxim 1500 / 2000 times solution 50kg 100g can be used to control the second generation armyworm. 6. Interlaced emasculation: when the male ear is just coming out of the top, and assisted pollination. 7. Timely waterlogging and drainage, timely harvest.