"Guang" means that the organic fertilizer applied to spring corn is a high-yielding crop. The level of its production is closely related to the level of soil fertility. In the high-yield and high-efficiency fertilization measures for spring maize, the first step is to extensively apply organic fertilizers to increase the soil fertility, which is generally per acre. Fertilizer input should not be less than 4,000 kg. "Steady", ie, stable application of nitrogen fertilizer to spring corn to apply good base fertilizer, regulate the amount of top dressing. In high-yielding fields with a yield of 500 kg or more, the nitrogen application rate per acre should be stabilized at 9-12 kg. For a medium yield field with a yield of 300-500 kg, the nitrogen application rate per acre should be stabilized at 7-10 kg; the low yield field with a yield per unit of less than 300 kg. Nitrogen per acre should be stable at 6-8 kg. At the same time, reasonable adjustment of the application period and methods to improve the use of nitrogen fertilizer. "Control" is to control the application of phosphate fertilizer. Currently, the utility of phosphate fertilizer has been widely recognized by people, but the application of phosphate fertilizer should be determined and controlled according to the amount of soil available phosphorus content. In the high, medium and low fields of three different yields, the appropriate amount of phosphate fertilizer per acre should be controlled within the range of 7 kg, 6 kg and 5 kg, respectively. Spring corn phosphate fertilizer is generally used as base fertilizer. “Increase†means that the increase of potash fertilizer decreases with the rapid availability of potassium in the soil, and the area of ​​potassium deficiency continues to expand. In order to meet the demand of corn for the growth of potassium, potassium fertilizer must be applied in an all-round way. The suitable amount of potash fertilizer in high-yielding fields is about 8 kg per mu, about 7 kg in middle-quality fields, and about 6 kg in low-yield fields, and the ratio of nitrogen, phosphorus, and potassium should be 1:0.5:0.6. “Supplement†means supplementing micronutrient fertilizer. Because of the improvement of maize varieties, the reform of farming systems, and the changes in fertilization structure, the deficiency of trace elements in soil is becoming more and more obvious, and especially the symptoms of zinc deficiency in maize have emerged on a large scale. Supplementary application of corn and zinc fertilizer can be applied in corn soaking, coating, etc., and can also be commonly applied when corn is sown or during seed dressing. 1 to 2 kg of zinc sulfate can also be applied in corn special fertilizer or corn seedling leaf Surface spray, add zinc fertilizer spray fertilizer. Diabetes Insipidus Treatment, Urnary System Drug, Urinary System Use Drug,Urinary Drug Taizhou Volsen Chemical Co., Ltd. , https://www.volsenchem.com