How to apply the most basic vegetable fertilizer in greenhouse
2023-12-22 10:08:45
First, according to the target yield of vegetables to determine the amount of fertilizer to determine the amount of fertilizer applied to the greenhouse, must consider the soil fertility and the amount of fertilizer required for vegetables. Generally, 30% of the total amount of nitrogen fertilizer, 80% of the total amount of phosphate fertilizer, and 50% of the total amount of potassium fertilizer are used as the base fertilizer, and the biological fertilizer and the micro-fertilizer are all applied as much as possible. For example, the yield of autumn 茬 tomato is generally 8,000-9000 kg. In this production range, 4,000 kg of nitrogen, 1.1 kg of phosphorus pentoxide and 4.8 kg of potassium oxide should be absorbed for each 1000 kg of tomato produced. The ratio of nitrogen, phosphorus and potassium is 1:0.25. : 1.1, more calcium, boron, etc. are needed. Among them, the high-phosphorus fertilizer should be selected as the base fertilizer, and the low-phosphorus fertilizer should be used as the top dressing. The amount of base fertilizer is preferably 40-50 kg, the ratio of nitrogen, phosphorus and potassium is 1:1:0.75; the application rate is 75-85 kg, and the ratio of nitrogen, phosphorus and potassium is 1:0.2:0.85.
Second, to ensure that the amount of organic fertilizer is sufficient, organic fertilizer (including farmyard manure, manure and cake fertilizer) is most suitable for the application of the base fertilizer, and more organic fertilizers should be applied to the old greenhouses with higher soil fertility as the base fertilizer. To maintain soil fertility and organic matter in the shed without reducing or slightly increasing, organic fertilizer must be added to the greenhouse soil. According to the change law of soil organic matter in greenhouse and the principle that the ratio of organic nitrogen to inorganic nitrogen is 1:0.4～1, the highest yield is calculated. It is necessary to maintain the soil organic matter in greenhouse for more than 2% to ensure higher yield and should be applied every year. The organic fertilizer with an organic content of 30% is not less than 2000 kg/mu.
Second, to ensure that the amount of organic fertilizer is sufficient, organic fertilizer (including farmyard manure, manure and cake fertilizer) is most suitable for the application of the base fertilizer, and more organic fertilizers should be applied to the old greenhouses with higher soil fertility as the base fertilizer. To maintain soil fertility and organic matter in the shed without reducing or slightly increasing, organic fertilizer must be added to the greenhouse soil. According to the change law of soil organic matter in greenhouse and the principle that the ratio of organic nitrogen to inorganic nitrogen is 1:0.4～1, the highest yield is calculated. It is necessary to maintain the soil organic matter in greenhouse for more than 2% to ensure higher yield and should be applied every year. The organic fertilizer with an organic content of 30% is not less than 2000 kg/mu.
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