Corn is a crop that requires a large amount of fertilizer. It is necessary to apply the base fertilizer, but also to apply the seedling fertilizer, joint fertilizer, panicle fertilizer and grain fertilizer. The key to rational fertilization and scientific fertilization lies in mastering the five words of “wide, stable, increasing, controlling, and supplementingâ€.
Yiguang organic fertilizer
Corn is a high-yield crop, and its level of production is closely related to the level of soil fertility. In the high-yield and high-efficiency fertilization measures of corn, the first is to widely apply organic fertilizer to improve soil fertility. Generally, the input of organic fertilizer per mu should be no less than 4000 kg. .
Two stable nitrogen fertilizer
Corn should be applied to the bottom fertilizer to regulate the amount of topdressing fertilizer. Summer corn should be applied to topdressing. In high-yield fields with a yield of more than 500 kg, the nitrogen application per mu should be stable at 9-12 kg; for the middle-production farm with a yield of 300-500 kg, the nitrogen application per mu should be stable at 7-10 kg; the low yield field with a yield of less than 300 kg. The nitrogen application per mu should be stable at 6-8 kg. At the same time, rationally adjust the application period and method to improve the nitrogen fertilizer utilization effect.
Three-control Phosphorus Fertilizer
At present, the role of phosphate fertilizer has been widely recognized, but the application of phosphate fertilizer should be based on the effective phosphorus content of the soil to determine and control the amount. In the high, medium and low yields, the appropriate phosphorus application rate per acre should be controlled within the range of 7 kg, 6 kg and 5 kg, respectively. Spring corn phosphate fertilizer is generally applied as base fertilizer, and summer corn can be applied with nitrogen fertilizer. The application of phosphate fertilizer should emphasize deep application and early application.
Four increase in potassium fertilizer
As the soil available potassium decreases year by year, the area of ​​potassium deficiency continues to expand. In order to meet the demand for potassium in corn growth, it is necessary to increase the total application of potassium fertilizer. The suitable potassium fertilizer application rate in high-yield fields is about 8 kg per mu, the middle-yield field is about 7 kg, the low-yield field is about 6 kg, and the nitrogen, phosphorus and potassium application ratio should be 1:0.5:0.6.
Five supplement micro-fertilizer
Due to the improvement of corn varieties, the reform of farming system and the changes in fertilization structure, the symptoms of trace element deficiency in soil are becoming more and more obvious, especially the symptoms of zinc deficiency in corn have appeared in large areas. Supplementing corn and zinc fertilizer can be applied in corn soaking, coating, etc., or in the corn sowing or seedling stage topdressing, generally apply 1~2 kg of zinc sulfate, or in corn special fertilizer or corn seedling stage. Foliar spray, zinc fertilizer added to the spray fertilizer.
Mono Calcium Phosphate ,the chemical formula is Ca (H2PO4)2.H2O, molecular weight of the body is 252.06, after dryed the product is white or slightly yellow micro powder or granules, the relative density of 2.22 (16 °C). Slightly hygroscopic, soluble in hydrochloric acid, nitric acid, slightly soluble in cold water, almost insoluble in ethanol. At 30 °C, 100 ml of water soluble MCP 1.8g. The aqueous solution was acidic, heating the aqueous solution can get calcium hydrogen phosphate. Lose crystal water at 109 °C and decomposed into calcium metaphosphate at 203°C. Applications:Monocalcium Phosphate is used to supply mineral nutrition such as phosphorus (P) and calcium (Ca) for animal, which can be easily digested and absorbed. Extensively applied as additives of Phosphorous and Calcium in aquatic animals feed.Higher water solubility of MCP is required in aquatic animals feed.
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