Detailed explanation of seedling raising technology in seedling trays

Seedling tray is an essential tool in modern agriculture for raising seedlings. This article provides a comprehensive overview of the selection, production, usage, and management techniques of seedling trays, ensuring you grasp the necessary seedling raising technology effectively.

Choosing and Manufacturing Seedling Trays

1. Material Selection

The primary materials utilized for crafting seedling trays include plastic, glass, and ceramics. Among these, Plastic seedling trays are notably favored due to their affordability, lightweight nature, ease of transport, and resistance to corrosion. Glass trays, known for their high transparency, facilitate the observation of plant growth, while ceramic trays offer excellent thermal insulation, making them ideal for cooler environments. When selecting a seedling tray, it's imperative to consider both your specific requirements and the environmental conditions.

2. Manufacturing Process

(1) Plastic Seedling Tray Production:

a. Gather the essential materials: polyethylene granules, water, a mixer, a heat gun, and molds.

b. Introduce the polyethylene granules into a mixing machine, adding an adequate amount of water for a thorough blend.

c. Transfer the blended mixture into molds, leveling the surface with a scraper.

d. Subject the mixture to high heat until it reaches approximately 70-80°C, then lower the heat to allow gradual solidification.

e. Once cooled, remove the tray from the mold to acquire a plastic seedling tray.

(2) Glass Seedling Tray Creation:

a. Acquire materials such as quartz sand, soda ash, limestone, glass-making raw materials, a high-temperature furnace, and molds.

b. In a high-temperature furnace, melt a mixture of quartz sand, soda ash, and limestone in specified ratios.

c. Pour the molten glass into the molds and allow it to cool naturally.

d. After demolding, you'll receive a glass seedling tray.

e. For ceramic trays, traditional methods, such as wheel techniques, may be employed.

How to Utilize Seedling Trays

1. Cleaning and Sterilization

Prior to using the seedling tray, it must be cleaned and sterilized. This process usually involves washing the tray with warm water combined with a mild detergent, followed by rinsing with clean water. For plastic trays, a diluted bleach solution is suitable for disinfection, while vinegar or alcohol can be utilized for glass and ceramic trays.

2. Filling with Soil and Seeds

Ensure the seedling tray is packed with appropriate soil, maintaining a balanced moisture level, as excessive wetness or dryness can hinder plant growth. Seeds should be spaced adequately on the soil surface at uniform depths, followed by a light misting of water using a spray bottle to keep the soil moist.

3. Controlling Light and Temperature

Regulating light and temperature is crucial as per the specific growth requirements of various plants. Most need sufficient sunlight for optimal growth, while others thrive in semi-shaded areas. Typically, a temperature range of 15-28°C is advisable, as extremes can be detrimental to plant health. Implementing facilities such as shade nets and insulating covers can effectively adjust these elements.

4. Ventilation and Humidity Management

Proper ventilation promotes air circulation, reducing the likelihood of diseases and pests. High humidity can lead to pathogen growth, whereas insufficient humidity causes dehydration in plants. You can manage humidity by opening windows for ventilation or utilizing humidifiers, coupled with regular misting to maintain soil moisture.

Seedling Tray Management Techniques

1. Regular Monitoring and Adjustments

Continuously observe the plants’ growth milestones, including leaf color and stem width. If any anomalies are noted, prompt adjustments regarding lighting and temperature should be made. Moisture and soil nutrition also require timely replenishment.

2. Prompt Weeding and Trimming

During plant development, it is essential to swiftly remove weeds and sick plants to conserve a hygienic environment in the plant seedling tray. For overgrown branches, appropriate pruning can support healthier growth and encourage branching.