If the fertilizer is applied improperly in greenhouse vegetables, it will not only lead to soil compaction, but also cause vegetable fertilizer damage, and it will also cause the nitrate and nitrite content of vegetables to exceed the standard and endanger human health. Therefore, in the greenhouse vegetable production, we must be careful to apply fertilizer and scientific fertilization. Scientific fertilization of greenhouse vegetables should pay attention to the following problems:
Farmhouse fertilizers should be fully decomposed when applying farmyard manure to greenhouse vegetables. Because there are no pathogens and eggs in the mature farmyard fertilizer, it is easy to spread the disease after being applied to the vegetables. In addition, if the farmyard manure is placed in a greenhouse and then decomposed, ammonia burning seedlings will be produced. Therefore, the farmyard manure should be fully decomposed and then applied. The farmer's fertilizer has complete nutrient content and long-lasting fertilizer effect. After application, it can not only improve the soil of vegetable fields, but also provide a variety of nutrients for vegetables. At least 3 square meters of farmyard manure per acre.
The fertilization method should be scientific and reasonable. The bottom fertilizer should be applied a week before the vegetable planting, and it should be evenly mixed with the soil. Topdressing can be carried out in a ditch or a hole at a distance of 7 to 10 cm from the plant. After topdressing, it is necessary to cover the soil and water it in time. Do not spread the fertilizer directly on the ground or plants to prevent the fertilizer from volatilizing or burning the vegetable seedlings. The top dressing should be carried out at the peak of the fertilizer required for vegetables and in the later stage of vegetable growth. It is best to choose it on a cloudy or evening day. Spray the fertilizer on the back of the new leaves and leaves as much as possible to facilitate the absorption of the vegetables.
Fertilizer application should be easy to lose the fertilizer in the greenhouse. Excessive application of chemical fertilizer can cause the concentration of salt in the soil to increase, leading to salinization of the soil. To control nitrogen fertilizer, increase the application of phosphorus and potassium fertilizer. The nitrogen fertilizers that need to be banned or limitedly applied are nitrate nitrogen, such as ammonium nitrate, potassium nitrate, and compound fertilizers containing nitrate nitrogen. In the management of greenhouse vegetables, increase the ventilation time and enhance the light intensity, which can reduce the nitrate content of vegetables. It is not advisable to apply chlorinated fertilizers such as potassium chloride or ammonium chloride. Chloride ion can reduce the starch content in vegetables, making the quality worse, and residual soil in the soil is easy to cause soil compaction. It is necessary to apply magnesium sulfate and ammonium sulfate fertilizers in a limited amount. Because sulfate ions are not easily absorbed by vegetables, they remain in the soil and endanger the growth of vegetables. In addition, a limited amount of ammonium bicarbonate is applied, which is easily caused by ammonia volatilization.
Micro-fertilizer application requires a small amount of trace element fertilizer. Although the demand for vegetables is small, its role in vegetable metabolism is very large, which can greatly improve the quality of vegetables. Currently used micro-fertilizers include boron, molybdenum, zinc, iron fertilizer, and the like. Micro-fertilizer is used as a base fertilizer, and can also be used for seed dressing, soaking seeds or top dressing. The range between the amount of micro-fertilizer and the excess is relatively narrow, so the dosage must be accurate to avoid causing damage.
The use of plant growth regulators to properly use plant growth regulators (such as gibberellin, ethephon, paclobutrazol, etc.) will promote the production of vegetables, but each regulator has certain conditions and scope in application. In particular, it is necessary to master the time and concentration of use, and it should not be sloppy, otherwise it will not achieve the effect of increasing the yield of vegetables, and people's long-term consumption will also be detrimental to their health.
Vigorously promote bio-organic compound fertilizer Bio-fertilizer contains microbial activated bacteria, which is a "four-in-one" fertilizer composed of organic fertilizer, inorganic fertilizer, bacterial fertilizer and synergist. It realizes the scientific formula of various fertilizers and complements each other. With mutual benefit, it is one of the best fertilizers for balanced fertilization of greenhouse vegetables.
Try to apply vegetable-specific fertilizers to promote vegetable-specific compound fertilizers on the premise of formula fertilization. The special fertilizer is determined according to the fertilizer characteristics of different vegetables and the soil fertilization status. The nutrients are more complete, the nutrition is more scientific, the formula is more reasonable, and the pertinence is stronger. After application, the yield and quality of greenhouse vegetables can be significantly improved.
Farmhouse fertilizers should be fully decomposed when applying farmyard manure to greenhouse vegetables. Because there are no pathogens and eggs in the mature farmyard fertilizer, it is easy to spread the disease after being applied to the vegetables. In addition, if the farmyard manure is placed in a greenhouse and then decomposed, ammonia burning seedlings will be produced. Therefore, the farmyard manure should be fully decomposed and then applied. The farmer's fertilizer has complete nutrient content and long-lasting fertilizer effect. After application, it can not only improve the soil of vegetable fields, but also provide a variety of nutrients for vegetables. At least 3 square meters of farmyard manure per acre.
The fertilization method should be scientific and reasonable. The bottom fertilizer should be applied a week before the vegetable planting, and it should be evenly mixed with the soil. Topdressing can be carried out in a ditch or a hole at a distance of 7 to 10 cm from the plant. After topdressing, it is necessary to cover the soil and water it in time. Do not spread the fertilizer directly on the ground or plants to prevent the fertilizer from volatilizing or burning the vegetable seedlings. The top dressing should be carried out at the peak of the fertilizer required for vegetables and in the later stage of vegetable growth. It is best to choose it on a cloudy or evening day. Spray the fertilizer on the back of the new leaves and leaves as much as possible to facilitate the absorption of the vegetables.
Fertilizer application should be easy to lose the fertilizer in the greenhouse. Excessive application of chemical fertilizer can cause the concentration of salt in the soil to increase, leading to salinization of the soil. To control nitrogen fertilizer, increase the application of phosphorus and potassium fertilizer. The nitrogen fertilizers that need to be banned or limitedly applied are nitrate nitrogen, such as ammonium nitrate, potassium nitrate, and compound fertilizers containing nitrate nitrogen. In the management of greenhouse vegetables, increase the ventilation time and enhance the light intensity, which can reduce the nitrate content of vegetables. It is not advisable to apply chlorinated fertilizers such as potassium chloride or ammonium chloride. Chloride ion can reduce the starch content in vegetables, making the quality worse, and residual soil in the soil is easy to cause soil compaction. It is necessary to apply magnesium sulfate and ammonium sulfate fertilizers in a limited amount. Because sulfate ions are not easily absorbed by vegetables, they remain in the soil and endanger the growth of vegetables. In addition, a limited amount of ammonium bicarbonate is applied, which is easily caused by ammonia volatilization.
Micro-fertilizer application requires a small amount of trace element fertilizer. Although the demand for vegetables is small, its role in vegetable metabolism is very large, which can greatly improve the quality of vegetables. Currently used micro-fertilizers include boron, molybdenum, zinc, iron fertilizer, and the like. Micro-fertilizer is used as a base fertilizer, and can also be used for seed dressing, soaking seeds or top dressing. The range between the amount of micro-fertilizer and the excess is relatively narrow, so the dosage must be accurate to avoid causing damage.
The use of plant growth regulators to properly use plant growth regulators (such as gibberellin, ethephon, paclobutrazol, etc.) will promote the production of vegetables, but each regulator has certain conditions and scope in application. In particular, it is necessary to master the time and concentration of use, and it should not be sloppy, otherwise it will not achieve the effect of increasing the yield of vegetables, and people's long-term consumption will also be detrimental to their health.
Vigorously promote bio-organic compound fertilizer Bio-fertilizer contains microbial activated bacteria, which is a "four-in-one" fertilizer composed of organic fertilizer, inorganic fertilizer, bacterial fertilizer and synergist. It realizes the scientific formula of various fertilizers and complements each other. With mutual benefit, it is one of the best fertilizers for balanced fertilization of greenhouse vegetables.
Try to apply vegetable-specific fertilizers to promote vegetable-specific compound fertilizers on the premise of formula fertilization. The special fertilizer is determined according to the fertilizer characteristics of different vegetables and the soil fertilization status. The nutrients are more complete, the nutrition is more scientific, the formula is more reasonable, and the pertinence is stronger. After application, the yield and quality of greenhouse vegetables can be significantly improved.
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