First, the selection of species.
We choose varieties that are high-yielding, heat-resistant, commercially viable, and disease-resistant for cultivation in protected environments. These characteristics ensure better growth performance and higher market value.
Second, nursery preparation.
1. Seedbed preparation: In a plastic greenhouse, nursery beds should be placed in easily accessible areas for efficient management. For winter and spring seedlings, heating methods such as electric heating are used. In summer and autumn, insect-proof shade nets are installed to protect young plants. The nursery can be used for both small-scale and industrialized seedling production. Before planting, all facilities must be disinfected. A solution of 30–50 ml formalin per square meter is mixed with 3 liters of water and sprayed onto the soil. The bed is then covered with plastic film. After one day, the film is removed, and the smell is allowed to dissipate before sowing.
2. Nutrient soil preparation: Choose loose, well-ventilated soil with a neutral pH, free from pathogens and pests. The mixture consists of 6 parts of fertile pasture soil (not planted with solanaceae crops for the past 3 years), 4 parts of decomposed manure, 1 kg of diammonium phosphate, and 15 kg of mixed fertile soil. Add 1 kg of wood ash and 0.5 kg of carbendazim. Mix thoroughly and fill into containers measuring 120 cm long, 60 cm wide, and 10 cm high. This creates a nutrient-rich soil suitable for seedling growth.
3. Seed treatment:
(1) Disinfection: Two main methods are used—hot water treatment and chemical disinfection.
- Hot water treatment: Soak seeds in clean water for 3–4 hours, then rinse and rub to remove impurities. Soak in warm water to swell the seeds, then immerse in 50–55°C water for 3–4 hours, followed by 5–10 minutes in hot water. Cool down in cold water before germination.
- Trisodium phosphate treatment: Soak seeds in clean water for 3–4 hours, then place them in a 10% trisodium phosphate solution (50 g in 500 ml water) for 20 minutes. Rinse with clean water and proceed to germinate.
(2) Germination: After disinfection, wash the seeds and let them sit for 6–8 hours. Wrap them in a damp cloth and keep at 25–30°C. Rinse once or twice daily with fresh water until they sprout.
4. Sowing: Sow the germinated seeds when 70% of the seeds have emerged. Choose a sunny morning for sowing. Water the seedbed before planting, level the soil, and mix the sprouted seeds with half of the nutrient soil. Spread evenly over the bed, then cover with 0.8–1.0 cm of nutrient soil. Apply 8 grams of wettable powder per square meter to prevent damping-off. Cover the spring seedbed with plastic film and the summer one with shade nets or straw curtains.
5. Post-sowing management: Once 70% of the seedlings emerge, remove the cover, ventilate regularly, increase light exposure to avoid leggy growth, and maintain moisture. Spray 150 mg/mu of mancozeb or 75% benzothiadiazole (100 g) mixed with 0.2 kg of potassium dihydrogen phosphate weekly to prevent diseases. At the true leaf stage, spray 1000–1200 times diluted Chilled Liquid to promote strong, thick stems and dark green leaves.
6. Seedling and sub-seedling care: When seedlings have two leaves and one heart, select a sunny day to transplant them into nutrient pots. The soil formula and treatment are similar to the nursery soil. After watering, apply 150 g/mu of 70% mancozeb or 110 g/mu of 75% benzothiadiazole mixed with 0.2 kg of KHâ‚‚POâ‚„ to prevent disease.
Sub-seedlings are not released until the temperature rises. Ground heating helps stimulate root development and quicken plant growth. One week before planting, gradually reduce the temperature to 15–20°C during the day and 5–10°C at night to harden off the seedlings.
Strong seedlings should meet these criteria: Spring seedlings should be 25 cm tall with a stem diameter of at least 0.6 cm, large buds, and dark green leaves without pests or diseases. Summer seedlings should have four leaves and one heart, about 15 cm tall, with a stem thickness of around 0.4 cm, and should be 25 days old.
CNC Milling
This classification mainly includes the casting Milling parts using in Machinery area,the raw material is aluminum alloy.
In the die casting process,higher specific pressure is required, so that higher filling speed can be obtained.which is beneficial for alloy to overcome mold filling resistance.and effectively fill each part of the cavity.The Casting General Tolerance is Grade GB-CT4.
Process Technology: High pressure die casting, Cold Chamber
Product Dimensions: Customized
Casting General Tolerance: Grade GB-CT4
Flow Processes: Die casting, Degating to remove the residual of the gate, Polishing and Deburring to remove the burrs, Polishing to remove the parting line, flash,CNC Turning, Cleaning, Packaging, Storaging, Shipping
Control Measure: Incoming Material Test, First Article inspection, Routing inspection, Final item inspection, and Outgoing quality control
Inspection Equipment: CMM, Caliper, Plug Gage, Screw Gauge
Application: Machinery Parts
Certificate: IATF16949:2016,ISO14001:2015,ISO45001:2018
Lead Time: 30-35 days
Trade Term: FOB Ningbo
CNC Milling,CNC Milling Zinc Die Casting,CNC Machining Milling Process,CNC Milling Service,Malaysia Aluminum Parts
NINGBO ZHENHAI BOLANG METAL PRODUCTS FACTORY , https://www.casting-part.com