First, fertilize and do sputum. Onion is a kind of vegetable crop that likes big fertilizer. The lack of any element of nitrogen, phosphorus and potassium fertilizer will lead to production reduction. In order to achieve high yield and high quality, it is necessary to apply scientific fertilization and apply enough base fertilizer. Generally , 50 kg of low-nitrogen, high-phosphorus, high-potassium-sulfur compound fertilizer with a total content of more than 45% , 5000 kg of decomposed farmyard manure or 500 kg of dried chicken manure , after spreading the fertilizer, plowing, soil tillage After the fine, it is made into a cymbal of 100 to 120 cm wide.
Second, choose strong seedlings. Required before transplanting seedling age onions preferably 50 to 55 days at which time rooting seedlings and easy, quick recovery growth after transplanting, seedlings diameter 5-6 mm, height 25 cm. 10 to 15 days before transplanting , spraying potassium dihydrogen phosphate foliar fertilizer on the seedlings can promote the early rooting of the seedlings after colonization.
Third, cover the mulch film. Plastic film cultivation can enhance the wintering ability of onions and improve the ability of soil water retention and fertilizer retention, so that the onion yield is greatly increased. Before the film is covered, it is necessary to fill the water to make the sputum. After the water in the sputum is completely oozing, when the soil is wet, spray 33% of the weeding solution to 100 ml per acre , spray evenly on the surface of the sputum, and then cover the membrane. Prepare the mulch film and the mulching tool. When working, choose a windless and sunny weather. Use both sides of the membrane to press the soil firmly. Otherwise, the mulch film will be damaged by the wind and it will not be convenient for field work.
Fourth, transplanting and planting. The transplanting period of onions in the central part of the province is generally in early November , and the mulch is covered 5 days before transplanting to increase the ground temperature. Holes were punched in the mulch before transplanting, with a line spacing of 20 cm and a plant spacing of 15 cm. After the seedlings are planted, they should be transplanted immediately. When transplanting, the roots should not be exposed to the surface, but it should not be too deep. The planting depth is 2 to 3 cm.
Source: Dingzhou Agricultural Bureau, Hebei Province
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Expanded Steel Diamond Mesh is another kind of metal screen industry, which is also one of the main varieties of metal plate mesh. Also known as expanded metal mesh, expanded diamond mesh, expanded metal lath, heavy steel plate net, foot net, punching plate, etc. After the steel mesh punching machine processing, the metal plate becomes a mesh with mesh of diamond.
Size: Opening size (mm): 2.5-50mm or according to customers` requirements
Thickness (mm): 0.5-10mm or according to customers` requirements
Material: High quality low carbon steel plate, aluminum plate, SS plate, titanium plate, aluminum foil plate, nickel plate, galvanized plate etc.
Surface Treatment: Galvanized, spraying antirust paint, anodic oxidation, PVC coated, powder coated
Use: Expanded sheet used for filter, medicine, papermaking, filtering, breeding, cell network, packaging net, mechanical facilities protection, handicraft manufacturing, high-end speaker net enclosures, decoration, child seat, basket, basket and road protection, foot tanker net, heavy machinery and boilers, oil mine, locomotive, million tons of ships such as working platforms, escalators, walkways. It can also be used for reinforcing steel bars in construction industry, highway and bridge.
Products Structure:
SWM: The length of a short diamond diagonal from a node
center to a node center
LWM: The length of the long diagonal line
from the center of the node to the center of the node
SWO: The length of the diagonal of a short
diamond
LWO: The length of the diagonal of a long
diamond
Strand Width: The length of the edge of the
diamond - shaped hole
Strand Thickness: Thickness of steel plate
Knuckle: Connection points of two mesh holes
Expanded Metal Process
If you are curious about how the process of forming expanded metal mesh, XinZheng is happy to provide you with a step-by-step guide to manufacturing these products on our state-of-the-art equipment.
1. Sheet or plate is advanced beyond the face of the bottom die in an amount equal to the strand width before flattening. The sheets are then fed into an expanding machine.
2. The top die then descends and simultaneously slits and cold forms an entire row of half diamonds.
3. The top die then ascends and moves one half of a diamond to the right as the base sheet or plate moves forward one strand width.
4. The top die descends, slits and forms another full row of half-diamonds completing a row of full diamonds in two strokes.
5. The die then ascends and returns to its initial position.
This process then continually repeats until the full sheet of expanded metal is completed. This mesh is then either cut into sheets or rolled into coils for either shipping or additional processing.
Please see the images below to view the expanded metal process:
Expanded Steel Diamond Mesh
Expanded Steel Diamond Mesh,Steel Diamond Mesh,Aluminium Expanded Mesh ,Expanded Metal Sheet
Anping Xinzheng Metal Wire Mesh Co., Ltd , https://www.sievingmesh.com