First, the selection of species.
We chose varieties that are high-yielding, heat-resistant, commercially viable, and disease-resistant for cultivation in protected environments. These characteristics ensure better growth performance and marketability under controlled conditions.
Second, nursery preparation.
1. Seedbed setup: In a plastic greenhouse, the seedbeds should be placed in a location that is easy to manage and operate. For winter and spring seedlings, heating systems such as electric heating are used to maintain optimal temperatures. During summer and autumn, insect-proof shade nets are installed to protect young plants from pests. The seedbeds can be used for both small-scale and industrialized seedling production. Before planting, all nursery facilities must be disinfected. A solution of 30–50 ml of formalin per square meter, mixed with 3 liters of water, is sprayed onto the soil, 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, low in pathogens and pests. The mix consists of 6 parts fertile topsoil (from land not previously used for solanaceous crops in the past three years), 4 parts decomposed manure, 1 kg of diammonium phosphate, and 15 kg of wood ash per cubic meter after thorough mixing. Additionally, 0.5 kg of carbendazim is added to the mixture to prevent fungal diseases. The nutrient soil is prepared in trays measuring 120 cm long, 60 cm wide, and 10 cm high.
3. Seed treatment:
(1) Disinfection: Two methods are commonly used—hot water treatment and chemical disinfection.
- Hot water treatment: Soak seeds in clean water for a few hours, then rinse and rub to remove impurities. Place them in warm water to swell, then immerse in hot water at 50–55°C for 3–4 hours, followed by a 5–10 minute soak. Cool the seeds 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 thoroughly and proceed to germinate.
(2) Germination: After disinfection, wash the seeds and wrap them in a damp cloth. Keep them at 25–30°C, rinsing once or twice daily with fresh water until they sprout.
4. Sowing: Once 70% of the seeds have germinated, sow them on a sunny morning. Water the seedbed thoroughly before planting, then level the surface with the nutrient soil. Mix the sprouted seeds with half of the nutrient soil and distribute evenly. Cover with 0.8–1.0 cm of nutrient soil. Apply 8 grams of diosperm wettable powder per square meter to prevent damping-off. Cover the spring seedbed with plastic film, and use shade nets or straw curtains in summer.
5. Post-sowing management: When 70% of the seedlings emerge, remove the cover and ventilate regularly. Increase light exposure to prevent leggy growth. Keep the soil moist and apply a weekly spray of 150 mg/mu of mancozeb or 75% benomyl (100 g per mu) mixed with potassium dihydrogen phosphate (0.2 kg/mu) to prevent diseases.
To control excessive elongation, spray 1000–1200 times diluted chlormequat chloride when the seedlings have two true leaves. This helps produce strong, compact seedlings with dark green foliage.
6. Seedling and transplant management: When the seedlings have two leaves and one heart, choose a sunny day to transplant them into individual pots. The potting mix and treatment are similar to the nursery soil. After watering, apply a spray of 70% mancozeb (150 g/mu) or 75% benomyl (110 g/mu) mixed with potassium dihydrogen phosphate (0.2 kg/mu) to prevent disease.
Sub-seedlings are usually not exposed to open air until they are acclimated to outdoor temperatures. The ground temperature is increased to promote root development and faster growth. One week before planting, gradually reduce the temperature by ventilating, keeping daytime temperatures between 15–20°C and nighttime temperatures between 5–10°C.
Strong seedlings should meet the following criteria: Spring seedlings should be 25 cm tall, with a stem diameter of at least 0.6 cm, large buds, and dark green leaves, free from pests and diseases. Summer seedlings should have four leaves and one heart, about 15 cm tall, with a stem thickness of around 0.4 cm, and be 25 days old.
Lighting Parts
This classification mainly includes the aluminum or zinc alloy die casting parts using in Lighting area.
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
Die Casting Lighting Parts,Aluminum Casting Lighting Parts,Zinc Die Casting Lighting Parts
NINGBO ZHENHAI BOLANG METAL PRODUCTS FACTORY , https://www.casting-part.com