Nutritional preparation: Cauliflower has weak root system during germination, and needs nutrient soil with sufficient nutrients, good permeability and sufficient water content. When the seedlings are seedling, the roots have increased adaptability, and the nutrient soil needs certain viscosity to prevent secondary seedling or colonization. Time is diverging. Therefore, when formulating nutritionists, it is advisable to use 4 parts of garden soil that has not been planted with cruciferous crops within 2 to 3 years, 4 parts of decomposed horse manure or chicken manure, and 2 parts of peat or Chen furnace slag. For each cubic meter of nutrient soil, 2 to 3 kg of compound fertilizer and 10 to 20 g of borax should be added. When the seedling nutrient soil is prepared, it uses 4 parts of decomposed horse dung or chicken manure and 6 parts of garden soil to increase the viscosity of the nutritionist. If the nutrient soil is too sticky, the proportion of organic fertilizer should be increased appropriately. Add 3 to 5 kg of compound fertilizer per cubic meter of nutrient soil, and 20 to 40 g of borax. After the nutrient soil is prepared, the nutrient bowl or seed bed can be divided and planted in time. Seedlings should be timely divided into 3 to 4 true leaves after emergence. The spring seedlings are mainly heat preservation, and the seedling age is about 70 days. The autumn seedlings are in the high temperature season. The seedbed should be mainly shaded, cooled, grass-proof and disease-preventing, and the seedling age is about 40 days.
2 heavy application of base fertilizer, timely planting: In order to meet the demand for fertilizer and water in the broccoli growing season, generally choose fertile, loose, water-preserving and fertile loam, deep turning about 30 cm. Combine cultivated land, apply or ditch with decomposed organic fertilizer. In the early spring, the cultivation period is short, and about 45,000 kilograms of organic fertilizer can be applied per hectare, 450 kilograms of compound fertilizer, 750 kilograms of ash, and 750 grams of borax. If the soil is deficient in molybdenum, 150-300 grams of ammonium molybdate per hectare is applied, first dissolved in water and then mixed with organic fertilizer. When the ground temperature in spring is above 5 °C, it can be colonized.
3 skill application of top dressing: After planting the seedlings, combine the water and the seedling water to apply the decomposed mature dung water once, 750 kg per hectare. Cultivate seedlings to promote the development of roots and flower bulbs. When the diameter of the flower ball is 3 to 5 cm, the seedlings are finished, and the water is topdressed in time. During the expansion of the whole flower ball, the soil should be kept moist. Generally, the water is poured once every 5 to 7 days, and the fertilizer is chased once every 10 to 15 days. Each time, the decomposed cake fertilizer or manure fertilizer is 1500 kg/ha, and it is matched. Application of nitrogen, phosphorus and potassium compound fertilizers, and spraying 0.3% potassium dihydrogen phosphate, 0.05% borax, or 0.01% ammonium molybdate to prevent premature aging, improve yield and quality of flower balls.
Products made from WPC are suitable for indoor and outdoor use. Their properties are customisable depending on the ingredient composition. Numerous products are already available on the market; additional products are expected for the next few years.
WPC Products have already been used successfully in many areas:
Building industry
Furniture industry
Automotive industry
Measurement engineering
Wood plastic composite Marketing Opportunities
In recent years, the market of wood plastic composites in North America has increased greatly and attracted the interest of both the plastics and the forest products industries. These wood-based composites have been successful in the marketplace primarily because they deliver consistently appropriate structural performance at a reasonable cost.
In the building community, there is a growing demand for high-performance, low-maintenance, and low-cost building products. To meet this demand, natural fiber thermoplastic composites are being used to produce such products as landscape timbers, railing, decking, fence, window and door elements, panels, molding, roofing, and siding, even floor ,louver, and indoor furniture have been reported. Some research point that wood plastic composites have become a major player in the North American decking market. Qizhen indicate that the advantages of wood-plastic composites can cause increase demands for value-added products made from them, and the market will increase dramatically in the near future and continue to grow in long-term. Recycling may help the wood-plastic composites industry as the recycling industries prepares for their future materials and their needs.
The demand of wood pallets and shortage of solid wood provide a large market for wood plastic composites in North America and Asia region. Besides, wood pallets and shipping crates represent a large source of raw material available for use in value-add composites. Recycling and reproducing would provide good market for wood-plastic composites. Furthermore, some synthetic materials can provide additional market for recycled plastic.
The phase-out of chromated copper arsenate (CCA) may give wood plastic composites opportunities to increase awareness of alternatives to CCA-treated lumber. Kamdem et al. studied the properties of wood-plastic composites made of wood flour from CCA-treated wood and recycled HDPE.
Lignocellulosics will be used in the future to produce a wide spectrum of composite products ranging from very inexpensive, low-performance materials to materials that are relatively expensive and have high-performance characteristics. Taking advantage of the wide distribution, renewability, and recyclability of lignocellulosics, more markets will be developed for low-cost renewable materials. By chemically modifying the lignocellulosic cell wall to overcome some of its disadvantageous properties, new markets for high-performance composites will develop.
By incorporating continual new product development into a firm`s R&D process, the forest products industry can greatly benefit through increased profitability, improved customer and stakeholder perceptions, and reduced risk of litigation and regulation. Moreover, concurrent new product and market development efforts, integrating customer needs back into the design and engineering of new products, will provide competitive advantage to WPC industry innovators.
In Asia region, market for wood-plastic composites has just started recently, and has more potential than North America because of the great market demand and the shortage of wood. Especially in mainland China, market may increase with Olympic 2008 in Beijing. The constructions of civil buildings will also provide opportunities for wood-plastic composites applications.
The future of WPC will depend on many factors, including new product identification, product quality, consumer reaction, and success of research and development efforts. Success will also depend on how well the forest products and plastics industries continue to establish relationships and work with each other.
Wood Plastic Composite Products, WPC Products, Outdoor Decking, Outdoor Decking Board
Shangyu YongSheng New Material Co., Ltd. , http://www.wpc-deckingboard.com