1. It is not advisable to water immediately after using urea. Urea is a readily soluble fertilizer with strong mobility and is highly prone to loss. Do not water immediately after spraying in dry land, and should not be applied before heavy rain.
2. Ammonium bicarbonate should not be applied. Ammonium bicarbonate is highly volatile and easily causes burning of seedlings. Therefore, it is not suitable for surface application. It is best to apply deep ditch and cover soil after application.
3. Ammonium bicarbonate should not be applied in greenhouses and greenhouses. Ammonium bicarbonate is known as gas fertilizer. It is applied in greenhouses and greenhouses and is easily decomposed into ammonia gas and volatilized to cause damage to crops in the greenhouse.
4. Ammonia nitrogen fertilizer should not be mixed with alkaline fertilizer. Ammonia fertilizers 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. The nitrate fertilizer should not be applied in rice fields. Nitrate ions dissociated by nitrate nitrate such as ammonium nitrate are easily denitrified in the paddy field by water leaching to the deep layer of the soil, resulting in nitrogen loss.
6. Ammonium sulfate is not suitable for long-term application. Ammonium sulphate is a physical acid fertilizer that is applied alone on a piece of land, which increases soil acidity, destroys the physical structure of the soil, and is applied in alkaline soil for a long time. It also reacts with calcium and calcium in the soil. The knot is stiff.
7. Phosphate fertilizer should not be applied in a dispersed manner. The mobility of phosphorus is small, and it is easy to be absorbed by the soil to reduce the fertilizer efficiency. When applying phosphate fertilizer, the contact area between phosphate fertilizer and soil should be reduced. It is best to use ditch application and acupoint application to concentrate on the near root.
8. Potassium fertilizer should not be applied in the late stage of crops. Potassium has the characteristics of being able to be transferred from the old leaves of the lower part of the crop to the young part of the top, so the symptoms of potassium deficiency are later than those of nitrogen and phosphorus. Therefore, potassium fertilizer should be applied in advance in the early stage of crop growth, or as a base fertilizer at one time.
9. Contain chlorinated fertilizers for long-term application, and avoid application in avoiding chlorine crops. Long-term application of potassium chloride alone will increase the accumulation of chloride ions in the soil, leading to soil nutrient structure destruction and soil acidification. Application on sugar-free crops such as sugar cane, sugar beet, watermelon, tobacco, etc., will reduce quality and quality.
10. Nitrogen-containing compound fertilizer should not be used in large quantities in legume crops. Soybean, peanut, mung bean, broad bean, pea, alfalfa and other crops have nitrogen-fixing rhizobium near the root. If a large amount of nitrogen-containing compound fertilizer is applied, not only the waste of fertilizer is caused, but also the activity of rhizobium is inhibited and the nitrogen fixation performance is lowered.
2. Ammonium bicarbonate should not be applied. Ammonium bicarbonate is highly volatile and easily causes burning of seedlings. Therefore, it is not suitable for surface application. It is best to apply deep ditch and cover soil after application.
3. Ammonium bicarbonate should not be applied in greenhouses and greenhouses. Ammonium bicarbonate is known as gas fertilizer. It is applied in greenhouses and greenhouses and is easily decomposed into ammonia gas and volatilized to cause damage to crops in the greenhouse.
4. Ammonia nitrogen fertilizer should not be mixed with alkaline fertilizer. Ammonia fertilizers 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. The nitrate fertilizer should not be applied in rice fields. Nitrate ions dissociated by nitrate nitrate such as ammonium nitrate are easily denitrified in the paddy field by water leaching to the deep layer of the soil, resulting in nitrogen loss.
6. Ammonium sulfate is not suitable for long-term application. Ammonium sulphate is a physical acid fertilizer that is applied alone on a piece of land, which increases soil acidity, destroys the physical structure of the soil, and is applied in alkaline soil for a long time. It also reacts with calcium and calcium in the soil. The knot is stiff.
7. Phosphate fertilizer should not be applied in a dispersed manner. The mobility of phosphorus is small, and it is easy to be absorbed by the soil to reduce the fertilizer efficiency. When applying phosphate fertilizer, the contact area between phosphate fertilizer and soil should be reduced. It is best to use ditch application and acupoint application to concentrate on the near root.
8. Potassium fertilizer should not be applied in the late stage of crops. Potassium has the characteristics of being able to be transferred from the old leaves of the lower part of the crop to the young part of the top, so the symptoms of potassium deficiency are later than those of nitrogen and phosphorus. Therefore, potassium fertilizer should be applied in advance in the early stage of crop growth, or as a base fertilizer at one time.
9. Contain chlorinated fertilizers for long-term application, and avoid application in avoiding chlorine crops. Long-term application of potassium chloride alone will increase the accumulation of chloride ions in the soil, leading to soil nutrient structure destruction and soil acidification. Application on sugar-free crops such as sugar cane, sugar beet, watermelon, tobacco, etc., will reduce quality and quality.
10. Nitrogen-containing compound fertilizer should not be used in large quantities in legume crops. Soybean, peanut, mung bean, broad bean, pea, alfalfa and other crops have nitrogen-fixing rhizobium near the root. If a large amount of nitrogen-containing compound fertilizer is applied, not only the waste of fertilizer is caused, but also the activity of rhizobium is inhibited and the nitrogen fixation performance is lowered.
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