Cucumber is an indeterminate growing vegetable. It grows quickly and has many results. However, the root system is mainly distributed in shallow tillage layers of 15 to 25 cm. The leaves have large water transpiration, fine plant stems, weak water-retaining capacity, and relatively low absorption capacity. difference.
The cucumber has a long growth period, high yield, and large nutrient uptake and is suitable for fertile soil cultivation. Re-applying organic manure, appropriately matching chemical fertilizers, and mastering the principle of “diet small meals, combine fertilizer and water†is the basis for obtaining high quality and high yield of cucumber.
Fertilizer selection
Organic Fertilizer
Organic manure is a complete fertilizer, and the three major elements of nitrogen, phosphorus, and potassium and the content of various trace elements are relatively complete.
In greenhouse cucumber production, due to the lower temperature and ground temperature in the early spring, the activity of the root system is inhibited. In addition, the ventilation of the facility is reduced, the indoor carbon dioxide is severely deficient, and the photosynthetic production will be significantly reduced.
A sufficient amount of organic fertilizer must be applied. It can not only supply the various nutrients necessary for crop reproduction, but also play a major role in activating soil nutrients and improving soil aggregate structure.
Must pay attention to the application of organic fertilizer is decomposed, otherwise it will cause burning roots, breeding pests, soil acidification and other hazards.
Biological fertilizer
Generally, the total soil potassium content and total phosphorus content per acre are 180 kg or more and 120 kg or more, but 80-90% of crops cannot be directly absorbed and utilized.
The application of biological bacterial fertilizer can accelerate the decomposition and transformation of soil organic residues and insoluble phosphorus, potassium and other mineral nutrients.
Compound fertilizer
Mainly used for basal fertilizer and topdressing, pay attention to application methods.
The amount of topdressing in the soil should be based on the principle of less and less ground. Generally, it is appropriate to chase 40kg~50kg per shed. If you feel that the amount of fertilizer is insufficient, you can increase the frequency of topdressing.
Cultivated cucumbers in greenhouses are not allowed to be shaved and dried and applied dryly. They must be applied along with gutters. In the high-yield period, every fertilizer must be watered to maintain the extension of the high-yield period.
Foliar spray fertilizer is generally in the middle and later stages of production, such as spraying high pure potassium dihydrogen phosphate (phosphorus and potassium source pool) at the later stage of growth, which can increase cucumber disease resistance, delay aging, and strive for high yield in the later period.
The spraying of foliar fertilizer is best performed separately from the spraying of pesticides. When spraying is required at the same time, it should be sprayed in the morning and sprayed in the afternoon to prevent phytotoxicity.
Cucumber fertilization scheme
Base fertilizer
Cucumbers are high-yielding crops and require relatively high base fertilizers. Cucumber belongs to the crop of high nitrogen and high potassium, and formula fertilization generally uses 30 kg of compound fertilizer + 2000-3000 kg of decomposed organic fertilizer + 7.5 kg - 10 kg of high-quality biological bacterial fertilizer per acre.
top dressing
After planting, fertilizer was topdressed 1 or 2 times according to plant growth.
For the first time, the seedling fertilizer can be applied 7 to 10 days after planting, and the sea sprite biological stimulant 200 to 300 times is applied, which is conducive to quick rooting and rapid seedling raising.
The second time before pumping ranch to flower, a large amount of element balance fertilizer 3 kg + sea elves biological stimulator 2 kg per acre to promote flowering results.
After the melon strip sits and grows to 10 to 15 centimeters, it should be fertilized when watering, and gradually begin to enter the stage of normal watering and fertilization.
Mainly in the high nitrogen and potassium fertilizers, the sea genie biostimulants containing humic acid ore source are added properly to improve the physical and chemical properties of the soil and improve the nutritional level.
When it is found that the melons are severe, the melon leaves are hypertrophy, and the melons are often misused, the application of 0.2 kg of phosphorus and potassium to 100 kg of water to dissolve the leaves is sprayed on the foliar surface. Once in 3-5 days, it can be effectively relieved. If other trace elements are missing, pay attention to supplements.
After entering the harvesting period, the fertilizer should master the principle of light pouring and ground pouring. The amount of fertilizer should be light and heavy.
According to the plant growth and harvest conditions, a large number of elements per acre each balance fertilizer 2 kg + 3 kg of high potassium fertilizer + sea elves biological stimulant 5 kg, it is recommended 10 days once fat.
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