1. The roots of seedling cucumber are distributed in shallow soil layer, with high oxygen demand and short seedling age. The soil looseness and quick-acting nutrient requirements for bed soil are higher. The ratio of seedbed soil preparation is 30% of decomposed horse manure and Chen furnace. 20% of ash, 10% of decomposed large feces and 40% of vegetable garden soil without melons. You can also use vegetable field soil 40%, river mud 20%, decomposed ring fertilizer 30%, grass ash 10%, add 2% - 3% superphosphate, fully mix well. If the phenomenon of lack of fertilizer is found, the nutrient solution can be added. The formula is 0.04% ammonium sulfate, 0.03% superphosphate, 0.05% magnesium sulfate, and 0.04% potassium chloride. Or add 10001 kg of ammonium nitrate, 0.95 kg of calcium nitrate, 0.50 kg of ammonium sulfate, 0.35 kg of potassium dihydrogen phosphate, and 0.02 kg of ferric oxide in 1000 kg of water. Such nutrient solution can be sprayed directly on the leaves.
2. Base fertilizer Cucumber is suitable for growth on loose soil with good ventilation and good reaction to organic fertilizers, especially in spring planting, applying fully decomposed organic fertilizer, which is beneficial to slow seedlings and hair growth. Therefore, cucumber cultivation must pay attention to the application of organic fertilizer, especially the application of base fertilizer. The amount of base fertilizer depends on the soil fertility. Generally, the fermented ring fertilizer is 4100--5000 kg per mu, and the superphosphate is 20--30 kg. After the tillage is even, ditch the ditch according to the line, apply 1000---1500 kg of high-quality decomposed mixed fertilizer per mu of ditch, mix and level with the soil at the bottom of the ditch to prepare the cucumber for planting.
3, topdressing Cucumber is a continuous continuous harvest of vegetables, the need for large amounts of fertilizer, combined with shallow cucumber roots, weak fertility, so the need to constantly apply fertilizer to ensure the normal development of the fruit and the robust growth of the plant. According to the distribution characteristics of cucumber root system and the law of fertilizer requirement, the amount of application should not be too large, and the number of times of application should be too much. Generally, it should be applied 4-5 times, and master the principle of “eat less mealsâ€. The application is based on quick-acting fertilizer, and the fertilizer is applied intermittently with human excrement. In the initial stage of the melon, the first top dressing was applied, and the pure nitrogen was applied to 3-3-4 kg, and the potassium oxide was 4--6 kg. In the early stage of the melon, the second top dressing was carried out, and the interval between the fillings in the melon period was shortened, combined with irrigation. In the third time, the amount of topdressing was the same, and after each halving, the last time you could not chase the potash. Foliar spraying can be carried out 2-3 times with 0.5% urea and 0.3%-0.5% potassium dihydrogen phosphate aqueous solution during the filling period. To increase the number of top dressings and shorten the interval. Topdressing should generally be carried out on a sunny day. In the case of easy soil nutrient loss during the rainy season, the method of covering soil after applying chemical fertilizer is better than the effect of applying manure water, applying 9--12 kg of ammonium sulfate per mu.
Cold Drawn Steel Round Bar is produced by cold drawing from hot rolled Steel Round Bar or hot rolled steel wire rod. Our advantages and more services of cold drawn steel Round Bar includes:
1) Wide range of diameters from 10mm to 150mm
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3) Good surface roughness: 0.4um to 1.6um
4) Good straightness: 0.5mm/m to 2mm/m
5) Good roundness: 80% of diameter tolerance
6) Diameter tolerance: -0.02mm to -0.1mm / h9, h10, h11
7) Matched further processing: Grinding, polishing, straightening
8) Anti-rusty package
9) Full sets of testing equipment: Surface, Dimenstion. Mechanical properties testing
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Cold Drawn Steel Round Bar
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