Improper use of chemical fertilizers can produce toxic side effects, which can both waste fertilizer and affect human health. Practice has proved that chemical fertilizers should pay attention to "six bogey".
One should avoid the application of ammonium nitrate in leafy vegetables. Cabbage, Chinese cabbage, leeks, spinach, celery, cabbage, etc., easy to absorb nitrate nitrogen fertilizer during growth, such as the application of ammonium nitrate, green leaves are nitrate ions, people eat salt after entering the human body, prolonged accumulation of poisoning.
Second, avoid applying urea after watering. The nitrogen component contained in the urea is an ammonium amide, and the urease or ammonium bicarbonate is absorbed and utilized by the urease secreted by the soil microorganism of the ammonium amide. If the urea is applied immediately after watering or encounters rain, the ammonia in the ammonium amide state will be lost. Therefore, whether urea is used as vegetable base fertilizer or top dressing, it should be applied for 5 to 6 days after it is applied, so that it can be completely converted and then watered to avoid loss.
Three bogey repeated application of ammonium sulfate. In acid soil or calcareous vegetable fields, if the ammonium sulfate is applied multiple times in succession, the acidic soil will become more acidic and the calcareous soil will be squashed, which will result in poor growth of the vegetables and a decrease in yield.
Four bogey vegetables are lacking in ammonium carbonate. Ammonium bicarbonate is extremely unstable and volatile. When applying ammonium bicarbonate in vegetable fields, deep application should be carried out regardless of whether the vegetable or the topdressing should be wet, and the soil should be covered immediately after application. In case of drought, you can apply water afterwards.
Five bogey excessive calcium. The large amount of calcium phosphate applied to the vegetable fields, especially in the case of more than 40 kg per acre, will seriously affect the growth and development of vegetables, causing dryness, premature aging, poor growth, reduced yield, and poor quality. Generally, 15 to 20 kg per mu is good, and melon and fruit vegetables can be applied more appropriately.
Six bogey leaves spray high concentration of nitrogen fertilizer. If the leaves are sprayed with urea, ammonium sulfate, etc., although the leaves and leaves of the vegetables are good, the content of the green leaves of the harmful salts will also increase significantly, which in turn affects human health.
One should avoid the application of ammonium nitrate in leafy vegetables. Cabbage, Chinese cabbage, leeks, spinach, celery, cabbage, etc., easy to absorb nitrate nitrogen fertilizer during growth, such as the application of ammonium nitrate, green leaves are nitrate ions, people eat salt after entering the human body, prolonged accumulation of poisoning.
Second, avoid applying urea after watering. The nitrogen component contained in the urea is an ammonium amide, and the urease or ammonium bicarbonate is absorbed and utilized by the urease secreted by the soil microorganism of the ammonium amide. If the urea is applied immediately after watering or encounters rain, the ammonia in the ammonium amide state will be lost. Therefore, whether urea is used as vegetable base fertilizer or top dressing, it should be applied for 5 to 6 days after it is applied, so that it can be completely converted and then watered to avoid loss.
Three bogey repeated application of ammonium sulfate. In acid soil or calcareous vegetable fields, if the ammonium sulfate is applied multiple times in succession, the acidic soil will become more acidic and the calcareous soil will be squashed, which will result in poor growth of the vegetables and a decrease in yield.
Four bogey vegetables are lacking in ammonium carbonate. Ammonium bicarbonate is extremely unstable and volatile. When applying ammonium bicarbonate in vegetable fields, deep application should be carried out regardless of whether the vegetable or the topdressing should be wet, and the soil should be covered immediately after application. In case of drought, you can apply water afterwards.
Five bogey excessive calcium. The large amount of calcium phosphate applied to the vegetable fields, especially in the case of more than 40 kg per acre, will seriously affect the growth and development of vegetables, causing dryness, premature aging, poor growth, reduced yield, and poor quality. Generally, 15 to 20 kg per mu is good, and melon and fruit vegetables can be applied more appropriately.
Six bogey leaves spray high concentration of nitrogen fertilizer. If the leaves are sprayed with urea, ammonium sulfate, etc., although the leaves and leaves of the vegetables are good, the content of the green leaves of the harmful salts will also increase significantly, which in turn affects human health.
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