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2. Ammonium bicarbonate should not be applied to the soil surface. The ammonium carbonate is highly volatile and easily causes burning. Therefore, ammonium bicarbonate should not be applied, it is best to open the hole for deep application and cover the soil after application.
3. Ammonium bicarbonate should not be applied in greenhouses and greenhouses. Ammonium bicarbonate is known as "gas fertilizer" and is applied in greenhouses and greenhouses. It is easily decomposed into ammonia gas and volatilized.
4. The ammonium nitrogen fertilizer should not be mixed with alkaline fertilizer. Ammonium nitrides such as ammonium bicarbonate, ammonium sulfate, ammonium nitrate, and ammonium phosphate encounter alkaline substances, which may cause loss of nitrogen. It should not be mixed with alkaline fertilizer such as grass ash, kiln ash potassium fertilizer and lime nitrogen.
5. Ammonium sulfate is not suitable for long-term application. Ammonium sulfate is a physiological acid fertilizer that destroys the physical structure of the soil. Long-term application in alkaline soils also causes the soil to become stiff and stiff due to the reaction of sulfate ions with calcium in the soil.
6. Phosphate fertilizer should not be applied in a dispersed manner. Phosphorus has less mobility and is easily absorbed by the soil to reduce fertilizer efficiency. When applying phosphate fertilizer, the contact area between phosphate fertilizer and soil should be reduced. It is best to use ditch application or acupoint application to concentrate on the near root of the crop.
7. Potassium fertilizer should not be applied in the late stage of crops. Potassium has the characteristics of being able to be transferred from the stems and leaves of the crop to the delicate parts of the top, so potassium deficiency is later than that of nitrogen and phosphorus. Therefore, potassium fertilizer should be applied in advance in the early stage of crop production, or as a base fertilizer.
8. Containing chlorinated fertilizers should not be applied alone for a long time, and avoid application in avoidance of chlorine crops. Long-term application of potassium chloride alone will increase the accumulation of chloride ions in the soil, causing the soil nutrient structure to destroy the acidification of the soil. Application on sugar beet, watermelon, etc., will reduce quality and quality.
9. Nitrogen-containing compound fertilizer should not be used in large quantities in legume crops. There are nitrogen-fixing rhizobium near the roots of soybeans, peanuts, mung beans, and other crops. If a large amount of nitrogen-containing compound fertilizer is applied, it not only causes waste of fertilizer, but also inhibits the activity of rhizobium and reduces its nitrogen fixation performance.
Huaxian Agricultural Technology Center Liu Xiuling
1. It is not advisable to water immediately after using urea. Urea is a soluble fertilizer that is highly mobile and can easily cause loss. After applying urea in dry land, avoid watering immediately and should not be applied before heavy rain.
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