What should be guarded against greenhouse celery management?
Greenhouse celery management should be hollow. Prevent celery from appearing hollow. When planting, choose non-sand soil cultivation. The base fertilizer should be applied with decomposed organic fertilizer. During the growth and development process, the celery should be topdressed according to the growth trend. When the color of the leaves is shallow, when the fertilizer is removed, the fertilizer should be applied in time. Topdressing application of photosynthetic nutrient film fertilizer (light fertilizer), advanced environmentally friendly compound film, can help plants absorb a lot of light fertilizer, light energy, light, nutrients, and supply plant growth and development to the limit.
PVC is the most widely used member of the vinyl family. Common applications include chemical processing tanks, valves, fittings & piping systems,and there are some products of pvc rigid sheet and pvc plastic sheet. PVC The outstanding performance of PVC includes high mechanical strength, high hardness, good chemical resistance, electrical insulation, good printing and welding. PVC modified varieties including high polymer PVC, chlorinated PVC and PVC / ABS alloy. It`s working temperature is 0℃~+70℃.
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Advantages:
♦ High mechanical strength, high hardness
♦ Good electrical insulation
♦ Excellent chemical and corrosion resistance
♦ Good printing and welding
♦ Flexibility adjustable
♦ Inflame retardingDisadvantages:
♦ Poor thermal stability
♦ Poor processing properties
♦ Poor impact resistance,
♦ Poor aging resistance and cold resistance
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White Pvc Sheet, Blue Pvc Sheet, Black Pvc Sheet, Grey Pvc Sheet
SHENZHEN XIONGYIHUA PLASTIC INSULATION LTD , https://www.xyhplastic.com