Application of ammonium nitrate Green leafy vegetables should not be applied with ammonium nitrate. Such as Chinese cabbage, Chinese cabbage, leeks, celery, spinach, etc., the growth period is short, easy to absorb nitrate nitrogen fertilizer. For example, if the ammonium nitrate fertilizer is applied, the green leaf vegetables absorb nitrate ions. When the salt enters the human body, especially after long-term consumption, it may cause cumulative poisoning.
Spraying of pure nitrogen fertilizer Green leafy vegetables should not be sprayed with nitrogen fertilizer such as urea or ammonium sulfate, and should not be sprayed with urine. For example, urea, ammonium sulfate or human urine sprayed on the leaf surface, although it can make the vegetable tender leaves fertilizer, the color is beautiful, and the yield is remarkable. However, the content of nitrate on green leafy vegetables will also increase significantly, causing the pollution of vegetables and affecting human health.
After applying urea, the nitrogen component in urea cannot be immediately irrigated. The amide nitrogen is absorbed into ammonium acetate or ammonium bicarbonate under the action of urease secreted by soil microorganisms, and is then absorbed or utilized by vegetable roots. . If the urea is immediately poured or exposed to rain, the nitrogen in the amide state will be lost with water, and the loss is greater than that of ammonium nitrate. Therefore, whether urea is used as base fertilizer or top dressing, it should be applied for 5-7 days after the application, so that all the conversion is completed and then water is poured to avoid loss.
Ammonium sulfate should not be applied repeatedly in acid soil or lime vegetable fields. If the ammonium sulfate is applied several times in succession, the acidic soil will become more acidic; the calcareous soil will cause soil compaction, which will hinder the normal growth of vegetables.
It is not suitable to apply ammonium bicarbonate in the lack of water in vegetable fields. Ammonium bicarbonate is extremely unstable and volatile, especially in the case of drought and water shortage in vegetable fields. Therefore, the application of ammonium bicarbonate in the vegetable field, whether as a base fertilizer or top dressing, should be carried out in the case of wetness of the vegetable field, and the soil should be covered immediately after application. In case of dry weather, water can be applied or watered.
Phosphate fertilizer should not be applied too much. The vegetable fertilizer is applied in large quantities in many years. The supply of phosphate fertilizer is too much. Especially when the application rate per mu is more than 40 kg, the damage is very serious, which will seriously affect the growth and development of vegetables, causing premature aging of vegetable plants and poor growth. The output is reduced and the quality is deteriorated. Generally, 15-20 kg per acre is suitable. Green leafy vegetables should not be applied to manure, manure, green leafy vegetables should not be poured into human feces, because non-fertilized humans, especially in hospitals, stations, docks, restaurants and public toilets, septic tanks, contain a variety of infectious bacteria and Parasite eggs. If the manure is directly applied to the green leafy vegetables without being tanning or treated, the vegetables will be seriously polluted and even cause a variety of infectious diseases and parasitic diseases. The use of such manure can be applied after decontamination treatment such as sealed stacking, biogas fermentation, and drug treatment.
The livestock manure should be applied after the stacking of pigs, cattle washers and cattle feed, mostly with crop straw and weeds, while straw and weeds are mixed with many weed seeds, weed seeds in animal manure and manure, vitality Strong, can be brought into the vegetable field with the fecal ring fertilizer and still germination and reproduction, which is very harmful to vegetables. Therefore, the manure should be taken out of the circle and piled up at high temperature (50-70 ° C) to kill the parasite eggs and pathogenic bacteria in the weed seeds and fertilizer. It can be applied in 1-2 months after stacking.
Spraying of pure nitrogen fertilizer Green leafy vegetables should not be sprayed with nitrogen fertilizer such as urea or ammonium sulfate, and should not be sprayed with urine. For example, urea, ammonium sulfate or human urine sprayed on the leaf surface, although it can make the vegetable tender leaves fertilizer, the color is beautiful, and the yield is remarkable. However, the content of nitrate on green leafy vegetables will also increase significantly, causing the pollution of vegetables and affecting human health.
After applying urea, the nitrogen component in urea cannot be immediately irrigated. The amide nitrogen is absorbed into ammonium acetate or ammonium bicarbonate under the action of urease secreted by soil microorganisms, and is then absorbed or utilized by vegetable roots. . If the urea is immediately poured or exposed to rain, the nitrogen in the amide state will be lost with water, and the loss is greater than that of ammonium nitrate. Therefore, whether urea is used as base fertilizer or top dressing, it should be applied for 5-7 days after the application, so that all the conversion is completed and then water is poured to avoid loss.
Ammonium sulfate should not be applied repeatedly in acid soil or lime vegetable fields. If the ammonium sulfate is applied several times in succession, the acidic soil will become more acidic; the calcareous soil will cause soil compaction, which will hinder the normal growth of vegetables.
It is not suitable to apply ammonium bicarbonate in the lack of water in vegetable fields. Ammonium bicarbonate is extremely unstable and volatile, especially in the case of drought and water shortage in vegetable fields. Therefore, the application of ammonium bicarbonate in the vegetable field, whether as a base fertilizer or top dressing, should be carried out in the case of wetness of the vegetable field, and the soil should be covered immediately after application. In case of dry weather, water can be applied or watered.
Phosphate fertilizer should not be applied too much. The vegetable fertilizer is applied in large quantities in many years. The supply of phosphate fertilizer is too much. Especially when the application rate per mu is more than 40 kg, the damage is very serious, which will seriously affect the growth and development of vegetables, causing premature aging of vegetable plants and poor growth. The output is reduced and the quality is deteriorated. Generally, 15-20 kg per acre is suitable. Green leafy vegetables should not be applied to manure, manure, green leafy vegetables should not be poured into human feces, because non-fertilized humans, especially in hospitals, stations, docks, restaurants and public toilets, septic tanks, contain a variety of infectious bacteria and Parasite eggs. If the manure is directly applied to the green leafy vegetables without being tanning or treated, the vegetables will be seriously polluted and even cause a variety of infectious diseases and parasitic diseases. The use of such manure can be applied after decontamination treatment such as sealed stacking, biogas fermentation, and drug treatment.
The livestock manure should be applied after the stacking of pigs, cattle washers and cattle feed, mostly with crop straw and weeds, while straw and weeds are mixed with many weed seeds, weed seeds in animal manure and manure, vitality Strong, can be brought into the vegetable field with the fecal ring fertilizer and still germination and reproduction, which is very harmful to vegetables. Therefore, the manure should be taken out of the circle and piled up at high temperature (50-70 ° C) to kill the parasite eggs and pathogenic bacteria in the weed seeds and fertilizer. It can be applied in 1-2 months after stacking.
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