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1. Avoid applying a certain fertilizer. The ideal application method is to apply organic fertilizer first, then nitrogen, phosphorus, potassium and other fertilizers are reasonably matched and scientifically applied.
2. Avoid high temperature fertilization at noon. The high temperature at noon not only evaporates quickly after spraying, but also the liquid fertilizer is not easy to be retained in the surface of the crop, and it is difficult to be absorbed by the pores.
3. Avoid the shallow application of nitrogen fertilizer topsoil. Applying nitrogen fertilizer to the shallow surface of the topsoil, it is easy to decompose and volatilize nitrogen after being exposed to sunlight.
4. Avoid excessive application of high concentration fertilizer at one time. Regardless of the type of fertilizer, if the dose is too large, the roots of the crop will be damaged.
5. Avoid spreading with water. For example, if potassium dihydrogen phosphate is mixed with urea and applied with water, the activity of phosphorus and potassium in the soil is small, and the utilization rate of fertilizer applied with water is very low, and basically stays in the topsoil.
6. Avoid applying ammonia and ammonium bicarbonate in a greenhouse or greenhouse. Because the ecological environment of the greenhouse is at high temperature and closed state, the two fertilizers are very volatile under high temperature and contain the plants, which will affect the normal growth.
7. Avoid "lalang match". Regardless of the nature of the fertilizer, any combination of application is not good. If the "ammonium nitrogen" fertilizer is mixed with alkaline fertilizers such as grass ash, lime, and phosphate fertilizer, it will accelerate the volatilization of nitrogen, resulting in waste of fertilizer and easy fumigation of crops.
8. Avoid applying phosphate fertilizer. Phosphorus has little mobility in the soil, and the application is particularly easy to be adsorbed by the soil and greatly reduces the fertilizer efficiency of phosphorus.
9. Avoid applying excessive amounts of nitrogen fertilizer to legume crops. Rhizobium is attached to the roots of soybean crops. If the amount of nitrogen fertilizer is too much, it will directly affect the ability of rhizobium to fix nitrogen.
10. Avoid excessive application of chlorinated fertilizer to sensitive crops. Tobacco, citrus, potato, grape and other sensitive crops should not be applied too much chlorine, otherwise it will affect the normal growth of the plant.
11. Avoid fertilizing before heavy rain. Because of heavy rain or showers after fertilization, fertilizers are easily washed away by rain and cause nutrient loss.
12. Avoid micro-fertilizers. Micro-fertilizers such as zinc, molybdenum, boron, and rare earth have good effects on crop "deficiency syndrome", but it is forbidden to "micro-fertilizer", causing crop malnutrition and hindered growth and development.
Huaxian County Agricultural Products Inspection and Testing Center Chang Bili
Fertilizer application
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