Greenhouse cucumber fertilization points
2024-11-08 21:01:05
Cucumber grows fast and has many results. It has high demand for water and nutrition. 4000-5000 kg of cucumber per mu requires 11-13 kg of pure nitrogen, phosphorus pentoxide is 6-15 kg, and potassium oxide is 14-16 kg. .
Due to the weak fertility of cucumber roots, the soil conditions are more stringent. Cucumber has the highest demand for potassium during the whole growth period, followed by nitrogen and phosphorus again. The amount of nitrogen uptake increased linearly within 30 days after planting, and the amount of nitrogen absorbed was the highest in the middle of growth. The demand for phosphorus in the reproductive growth period increased sharply, while the demand for nitrogen decreased slightly, and potassium was absorbed during the whole growth period of cucumber. Therefore, in the production process, it is necessary to carry out rational fertilization according to the fertilizer characteristics of cucumber to obtain high-yield and high-quality effects.
1. Adding organic
Organic fertilizer not only supplies various nutrients for cucumber growth and development, but also reduces soil bulk density, increases soil porosity, and improves soil physical and chemical properties. Therefore, organic fertilizer plays a major role in the sustained high yield of cucumber, activation and improvement of soil. In production, 2,500 to 3,000 kilograms of swine manure and 5000 kilograms of soil manure should be applied.
2. Reasonable application of chemical fertilizer
Cucumber roots are shallow, relatively weak, and the fertilization concentration is too high, causing root burning. Cucumber should be eaten with more fertilizers, and the base fertilizer should be 25~30 kg of diammonium and 23~27 kg of potassium sulfate. During the growth of cucumber, it is necessary to topdress at any time. The total amount is 47 to 53 kg of urea and 52 to 58 kg of potassium sulfate. The top dressing time is generally controlled in the early stage. In the late growth stage, combined with irrigation and picking, the nitrogen fertilizer and potassium fertilizer are used once every 7 to 10 days (or the fertilization with equal nutrient content).
3. Spraying foliar fertilizer
In the middle of cucumber growth, spraying 0.2% to 0.3% potassium dihydrogen phosphate solution can achieve good yield increase.
4. attention to the application of biological fertilizer
Increasing the application of organic fertilizers and biological fertilizers to reduce chemical fertilizers is an inevitable choice for the production of pollution-free green food. The newly built greenhouses are applied with 8 kg of high-quality organic biological fertilizers one time. The cucumbers grow robustly, sitting more melons, melons are long, and The picking period can be extended.
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