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2, the application of base fertilizer: general base fertilizer accounted for 30-40% of the total fertilizer, per mu should be applied to farmer's fertilizer 2000-3000 kg, the base fertilizer should be combined with nitrogen, phosphorus, potassium. 3, light application of seedlings: the main role of seedlings is to promote hair roots and strong seedlings, combined with the first cultivating, chasing seedlings once, with quick-acting fertilizers.
3, re-application of attacking fertilizer: panicle fertilizer is the most important top dressing in corn growth. Re-application of panicle fertilizer can promote the development of ear, increase the number of grains per panicle, reduce the degree of baldness, and have a significant yield-increasing effect. Spike fertilizer is mainly composed of quick-acting nitrogen fertilizer, and the application rate accounts for 40-50% of the amount of topdressing.
4, skillful application of granular fertilizer: before and after corn flowering pollination, the application of a small amount of nitrogen fertilizer, increased grain weight, especially in the late stage of lack of fertilizer, timely application of granular fertilizer, to prevent premature aging, improve yield has a certain effect, mainly available nitrogen fertilizer. Too much fertilization, too late, will result in late maturity. If the soil is fertile, it is not necessary to apply the plants when they grow green.
Main points of corn fertilization technology
1. The demand for fertilizer nitrogen, phosphorus and potassium varies with the yield, region and variety. The actual application rate should be determined according to the amount of fertilizer, soil fertility, fertilizer quality and fertilization method. Generally, for every 100 kilograms of corn kernels produced, it is necessary to absorb 3.5-4.4 kilograms of nitrogen fertilizer, 1.2-1.7 kilograms of phosphate fertilizer, and 3-3.8 kilograms of potassium fertilizer.
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