It takes 3-4 days for soybean sprouts to sprout;

1. Select soybean seeds: When cultivating bean sprouts, try to use fresh bean seeds that are born in the same year or every other year and are fully mature. The grains are full, bright in color, free from mechanical damage and pests and diseases, and must be stored in a low temperature, dry environment. Commonly used seed selection methods include screening, winnowing, water selection and manual selection.

2. Pre-germination treatment: To promote seed germination, "starting treatment" and "seed soaking treatment" are usually used. The method of starting the treatment is: before sending the pre-selected beans into the sprouting container, they are generally poured into hot water of 60°C, soaked for 1 to 2 minutes, and then washed with cold water 1 to 2 times. The purpose is to Adjust the activity of the oxidase system related to the germination of bean seeds, and stimulate the dormant seeds with temperature, which helps the bean seeds germinate neatly and uniformly. The method of seed soaking is: 1 kilogram of mung beans or soybeans requires about 1 kilogram of water. The most suitable water temperature for soaking bean seeds is 20 to 23°C. When soaking seeds in winter, warm water is generally used. In summer, cold water can be used to soak seeds directly. The soaking time of bean seeds usually takes about 8 to 12 hours.

3. Germination temperature: Soybean and mung bean seeds are both temperature-loving and heat-resistant vegetable crop seeds. The minimum temperature for bean seeds to germinate is 10℃, and the optimal temperature is 21~27℃. , the maximum temperature is 28 ~ 30 ℃, and should not exceed 32 ℃. The temperature is adjusted by watering during bud cultivation. For example, if the temperature is too high in summer, cold water should be generally poured on the bean sprouts, but attention should be paid to watering the buds in the center of the cultivation container. Vegetables should be cooked to lower the temperature. In winter, when the temperature is low, warm water should be poured to increase the temperature of the bean sprouts being cultivated, and at the same time, the circulation of cold air should be minimized. If a small amount of bean sprouts is cultivated at home, the cultivation container can be placed next to the stove or stove to keep it warm in winter.

4. Watering to induce germination: There are generally two methods of watering when growing sprouts: one is the watering method, which requires more water each time, and at the same time, the bean sprouts in the entire container should be Dren it thoroughly, and be sure to adjust the heat of each part of the bean sprouts in the entire container evenly until the temperature of the water flowing out is consistent with the temperature of the water when pouring in. The other is to use the water filling method, fill the entire container with water, and make the water surface about 2 cm higher than the surface of the bean sprouts, so that the bean sprouts in the container are generally immersed in water, and then drain or pour out all the water. Repeat watering in this way 1 to 2 times until the temperature of the bean sprouts in each part of the container is adjusted to the same level.

5. Harvesting at the right time: Harvesting is most suitable when the bean sprouts grow and develop until the embryonic stem is fully elongated, and the true leaves will be exposed or begin to be exposed. At this time, the embryonic stem is about 5~ 6 cm, the root length is about 0.5-1.5 cm, the watercress is egg yellow, the embryonic stem is milky white and shiny, the first exposed true leaves are milky yellow, and there are no lateral roots. At this time, every kilogram of mung beans can produce 7 to 8 kilograms of mung bean sprouts, and every kilogram of soybeans can produce 4 to 5 kilograms of soybean sprouts.