The balance of fertilization in summer corn is very important. When using fertilizer, it must not be taken care of. Therefore, we must pay attention to the following four aspects: 1, due to soil fertilization: There are three main types of soil, one is tidal cinnamon soil, is the city's most important soil category, accounting for more than 70% of the city's soil area, summer corn balanced fertilization technology based on the above program. The second is shale and black soil, which accounts for about 20% of the city's soil area. The soil is rich in potassium and phosphorus, which is more viscous, and has better water retention and nutrient retention. Summer fertilization should consider 50% more phosphate fertilizer than influent cinnamon soil. Reduce about 50% of potassium fertilizer. The third is fluvo-aquic soil, which is a kind of silty soil in our city. It has poor water retention and fertility conservation. Summer fertilization should be considered when applying fertilization to avoid fertilizer loss. 2. Number of fertilizing: 600 kilograms of land per mu, 40 kg of urea, 15 kg of diammonium phosphate, 20 kg of potassium chloride, and 700 kg of land per mu, 50 kg of urea can be applied throughout the growing period , 20 kg of diammonium phosphate, 25 kg of potassium chloride; more than 750 kg per mu of land, the whole growth period can be applied 60 kg of urea, 25 kg of ammonium phosphate, 30 kg of potassium chloride. High-yield plots should consider the application of trace element fertilizers, mainly including zinc fertilizers, boron fertilizers, and sulfur fertilizers. The amount of fertilization is 1 kg of zinc fertilizer per mu, 0.5 kg of boron fertilizer, and 5 kg of sulfur fertilizer. 3, fertilizer management: After wheat harvest, seedlings should be immediately applied, mainly including 30% nitrogen fertilizer, all phosphorus and potassium fertilizer, trace element fertilizer. 50-60% of nitrogen fertilizer is applied as a panicle fertilizer in the big mouth period. During the tasselling period, grain fertilizer is used to make up 10-20% of the total nitrogen. 4. Foliar fertilization (also known as root and root fertilization): Summer maize seedling roots are underdeveloped, and the ability to absorb nutrients is weak. It can spray foliar fertilizer containing trace elements and growth regulators to promote growth; In the later period, the absorption capacity of the roots decreased, and foliar fertilizers containing a large amount of elements can be sprayed. The concentration of foliar fertilizer is about 0.3-0.5%, and the time should be in the morning or evening to avoid burning the leaves. Growth Promtor,Growth Promoter For Poultry,Growth Promoter Hormone,Growth Promoter For Cattle Sichuan Aibang Weiye Biological Engineering Co., Ltd. , https://www.aibangpharm.com