Black beans are known as "king of drugs," and buds sprouted with it are also called "green soy stalks" and have certain medicinal value. The use of foam box production, and live sales, than the Sharapang box production and labor saving materials, simple operation, short cycle, good quality, high yield, and after the output can be preserved for several days without decay, deterioration, no wilting loss. First, the requirements of tools and production sites Foam box: Foam box specifications are generally length 56 width 40 height 17 (unit: cm), weighs about 250 grams. Nissan 10 boxes of watercress, about 110 boxes (including turnover boxes). 2. Venue requirements: Production of black bean sprouts, can use idle houses, closed balconies or winter greenhouses. Temperature requirements 18-25 °C, relative humidity 85% -95%. The light requires low light, or is produced under completely dark conditions, artificially filled with incandescent or biological effects lamps. Second, production technology Selected beans: black beans that produce green soy bean sprouts. The main varieties available are black cattle and black beans. These two varieties are used for production. The sprouts are fast, the growth cycle is short, the thickness is uniform, the height is neat and consistent, and the disease resistance is strong. Good palatability. Regardless of which black bean is chosen, its appearance must be full and full of crushed kernels. It is best to use black beans harvested that year. 2. Prenatal treatment: First, the black beans were subjected to winnowing and waterflooding, and the bean cultivars damaged by mechanical grinding and worms, broken, decayed mildew, and small grain seeds were excluded. When the water floats, it is necessary to gently scrub with hands repeatedly, and stir and scoop, try to remove the impurities and beans, then pour the black beans into the bamboo sieve and drain the water. 3. Soak beans: Pour the dry black beans into a warm water of about 5WC to disinfect and sterilize them, and be careful not to stop stirring quickly. This process takes about 15 minutes, then add appropriate cold water, cool down to 25-30 °C soaking, while adding a bag of water? ABT powder (every 5 kg beans), to inhibit the emergence of lateral root hairs, and promote the green bean The food is thick and prosperous, crisp and fragrant, improving its quality and yield. Soaking the beans takes about 24 hours. After the black beans are fully swelled and swelled, the beans are rinsed 2-3 times with clean water to remove the sticky material that sticks to the skin of the bean and then poured into the bamboo sieve to control the net moisture. Let it dry for about three to five minutes and prepare for germination. 4. Germination: Spread a layer of newspaper or toilet paper on the bottom of the foam box and spray wet with warm water at 25°C. Then spread the black beans evenly in the foam box. To make the beans in the bottom of the box, cover the beans with a layer of beans. Do not pry into piles and do not pull them too thin. After spraying, spray warm water at about 20°C. The amount of water sprayed is not dripping in the foam box after spraying, and it is better not to store water to prevent the seeds from rot and stink. Then tile the floor, every six trays for a stack, to carry out pre-germination. 5. Production: After about 30 hours, the black bean sprouts in the box can grow up to 3-4 cm. At this time, the foam box can be placed on the bracket or on the ground, and a daidzein can be taken, 1-2 kg of water. The sprayed shoots were sprayed on the shoots to inhibit root growth and development, reduce lateral root production, and increase cotyledon area. When the black bean seedlings are 8-9 cm high, take a thickening agent and spray 1 to 1.5 kg of water. Spray the shoots with a sprayer to suppress the elongation of the stem and leaf growth points and make the stems thicker and crisper. Cellulose content, and make the watercress large and dark green. During the entire production process, spray water 2-4 times a day and spray with a sprayer. The temperature is high and the temperature is low. When the temperature is low and the humidity is high, spray is less. Less spray in the early growth stage; more spray in the late growth stage. During the production process, we must pay attention to removing the rotten seeds in time so as not to infect the vegetables and affect the growth. 6. Selling standard: seedling height about 20 cm, no rotten roots, no hairy lateral roots, only 1 cm thin white main root, no odor, crisp and fresh without fiber, hypocotyl milky white transparent, epicotyl light green shiny, The two watercress exhibitions are suitable times for sale. At this time, FCL can supply hotels, restaurants, hot pot city, etc., and can also be retailed in the market. When the foam box is reused, it must be thoroughly disinfected with the medicine, otherwise it is prone to germ infection.