A Complete Guide to Four-Season Box Cultivation Techniques for Chinese Mahogany (Toona sinensis) Sprouts

Chinese mahogany sprout vegetables, rich and fragrant, with a unique flavor, are a delicious woody vegetable delicacy. They are a vegetable deeply enjoyed by both urban and rural people.

When produced in a temperature-controlled box, since the temperature can be controlled, they can be produced in all four seasons. The new soilless cultivation technique for Chinese mahogany sprouts is introduced below:

1. Production method: Produce in a temperature-controlled box. This method is suitable for household workshop-style production, with flexible and convenient operation, multi-layer three-dimensional tray planting, and temperature that can be regulated at any time. The operation and management method of this technique is equally applicable to large-scale production. Perlite is best used as the substrate; it is lightweight, has good permeability, and is itself a product sintered at high temperature, so there is no need for strict disinfection before use. The growing trays are generally made of plastic products or self-made from oil-free wood, with a height of 5-7 cm, and length and width flexibly determined according to the size of the temperature box. A layer of plastic window screen or plastic basket bottom is nailed to the bottom to facilitate air and water permeability and maintain a certain humidity.

2. Seed soaking:

(1) First choose new-season Red Toona No. 6 seeds of the current year, remove impurities, and rub off the wings before use.

(2) Soaking: Use an appropriate amount of hot water at 45-60°C to soak the seeds for 15-20 minutes, stirring constantly with the hand during this period so that the seeds are heated evenly. When the water temperature drops to 22-25°C, remove the seeds and place them in a container holding Growth Agent No. 2 solution, then place the container in the temperature-controlled box at a constant temperature of 22-25°C. After soaking for 8-12 hours, remove the floating shriveled seeds and impurities, rinse clean with warm water at 25°C, and set aside.

3. Constant-temperature germination: First wash the seedling trays and growing boxes clean with a one-ten-thousandth potassium permanganate solution and dry them in the sun. Spread a layer of perlite about 1 cm thick on the bottom layer and mix it moist with water, then evenly broadcast the soaked seeds onto the substrate at a sowing rate of 240 grams per square meter. Then place the growing boxes into a 22-25°C constant-temperature box for germination and growth, keeping them watered 3-4 times a day with water at the same temperature. Under normal conditions, sprouting occurs in 2-3 days, and harvesting can be done in 6-8 days.

4. Management and harvesting:

① When the sprouts grow to 1.5-1.8 cm, the nutrients of the seeds themselves can hardly meet the needs of the rapid growth of the toona sprouts, so use an equal-proportion Growth Agent No. 2 solution to spray the sprout bodies 20 minutes after each watering.

② When the sprout bodies grow to 5-6 cm, use a spectral argon ion lamp to illuminate the sprout bodies every night until harvest. The commercial toona sprouts grown this way are emerald green in color, fragrant, crisp, and tender. When the Chinese mahogany sprout bodies grow to 8-10 cm, they should be sold promptly to avoid the toona sprouts becoming old. At harvest, pull out the seed sprouts together with the roots, rinse them clean, package them carefully, and bring them to market in batches; the price is higher than that of conventional vegetables.