2. Pre-breeding treatment: to promote seed germination, usually using the "start-up treatment" and "immersion treatment". The method of starting treatment is: after the pre-selection of beans, before sending into the germination container, generally poured into 60 ℃ of hot water, soak 1 ~ 2 minutes, followed by cold water washing 1 ~ 2 times, the purpose is to adjust the activity of oxidative enzymes related to the germination of bean seeds, to the dormant state of the seeds to the temperature of the stimulus, to help the germination of the beans neatly and consistently. The method of seed soaking treatment is: 1 kg of mung beans or soybeans need about 1 kg of water, the most suitable water temperature for bean seed soaking is 20 to 23 ℃. When soaking seeds in winter, usually with warm water, summer can use cold water to directly soak the seeds, beans soaking time generally takes about 8 to 12 hours.
3. Sprouting temperature: soybean and mung bean seeds belong to the temperature-loving, heat-resistant vegetable crop seeds, the minimum temperature of its bean seeds germination is 10 ℃, the optimal temperature of 21 ~ 27 ℃, the highest temperature of 28 ~ 30 ℃, should not exceed 32 ℃, the germination of the regulation of the temperature is the use of watering, such as summer temperatures are too high, the application of cold water generally watering the bean sprouts, but pay attention to water thoroughly! Cultivate the central part of the container sprouts, so that it reduces the temperature, winter temperatures are low, the application of warm water watering, in order to raise the temperature of bean sprouts in cultivation, while minimizing the circulation of cold air. Family small amount of cultivation of bean sprouts, winter can be placed in the cultivation container next to the stove, stove heat preservation.
4. Showering sprouts: the sprouts when the showering method generally has two kinds: a showering method, the amount of water required for each shower to be more, at the same time should be the entire container of bean sprouts generally drenched, be sure to make the entire container of all parts of the sprouts in the heat of the regulation of the uniformity, until the temperature of the water out of the water temperature and the shower into the water temperature is consistent so far. Another is to use the irrigation method, fill the entire container with water, and make the water surface above the surface of the bean sprouts about 2 centimeters, so that the container of bean sprouts generally immersed in the water, and then let all the water away or pour clean. Repeat this watering 1 to 2 times, until the temperature regulation of the sprouts in each part of the container is consistent.
5. Timely harvesting: harvesting is best suited to the growth and development of bean sprouts to the full elongation of the embryonic stem, and the true leaves will be exposed or begin to show the best, at this time, the embryonic stem length of about 5 to 6 cm, the root length of about 0.5 to 1.5 cm, the bean was egg-yellow, the embryonic stem appeared milky white and crystal clear, began to show the true leaves were milky yellow, do not produce lateral roots. At this time, each kilogram of mung beans can produce 7 to 8 kilograms of mung bean sprouts, each kilogram of soybeans can produce 4 to 5 kilograms of soybean sprouts
.