1. Choose beans. Choose beans that are dry, clean, consistent in size, good in maturity, smooth in surface, high in germination rate, free from pests and diseases, impurities, mechanical damage, and strong in germination.
2. Soak the beans. Pour the seed beans directly into the bucket. Each bucket can soak 7.5 kilograms of seed beans. For every 5 kilograms of seed beans, use 2 ml of rootless thickening agent to soak the seeds. The amount of water added is such that the beans will not be exposed to the water after they are swollen. , do not add too much or too little water (approximately 2 kilograms of water per kilogram of soybeans), shake the bottom several times, and stir evenly. Seed soaking time is 4-6 hours in summer, about 12 hours in spring and autumn, and 24 hours in winter.
3. Sowing. First spread a layer of sand on the cement floor with a thickness of about 3.3 cm. Use a thin plywood scraper to smooth it. Sprinkle the swollen seed beans directly into the paved sand bed. Generally, there can be Sow about 2.5 kilograms of seed beans. Spread the beans as evenly as possible. Do not leave any gaps when spreading the beans on the sand surface, and do not pile them into clumps. Too thin or too dense is not good. After the seeds are sown, cover them with sand. First, scrape the seeds scattered around the sand plot into the plot, and then gently pour the new sand on the bean surface.
4. Preliminary management of bean sprouts. One or two days after sowing, if the temperature is around 20°C, the evaporation of water in the sand patch is not large. In addition, water replenishment is sufficient during sowing. Generally, there is no need to consider replenishing water. During this period, try to close doors and windows to reduce water evaporation. , maintain the humidity in the air and the humidity in the sandy soil. If the temperature is around 30°C and water evaporates quickly, you can replenish water once appropriate in the afternoon of the second day after sowing. When the temperature is below 20°C, water should be added on the third day after sowing.
5. Grab sand. After the sand has been pushed up to a certain extent, the sand covering the surface of the bean sprouts is removed with your hands, so that the stems of the bean sprouts can be exposed and grow.
6. Fill with sand. Sand flushing is to wash away the residual sand remaining on the bean sprouts with water after grabbing the sand, mainly to reduce the resistance to the growth of bean sprouts.
7. Post-production management. The suitable temperature for the growth of bean sprouts is around 15-32℃. When the temperature exceeds 30℃, the growth is fastest and the demand for water is also large. It should be sprayed with water twice or more a day. When the temperature is 20-30℃, it also needs to be sprayed with water in the morning and Spray water once in the evening. If a rootless thickening agent is used during seed soaking, there is no need to spray the rootless thickening agent after sand grabbing, showering and throughout the growth period. The medication used during seed soaking is effective for the entire growth period of the bean sprouts. , has a significant effect on roots, main stems, and watercress. But you can also use the medicine twice after catching the sand. For the first time, after the sand is washed, when the bean sprouts grow to 6.6-10 cm high, a 2 ml rootless thickening agent can be sprayed with 3-5 kg ??of water. The area is 5-10 square meters. The chemical solution must be evenly sprayed. Do not spray too heavily for the first time. If it is too heavy, the root system will stop growing. After harvesting, the root system will not look good. The second application of the pesticide should be done when the stem length is 13cm in the late growth period. In the first two days of harvesting, the same amount of water can be sprayed to 4-6 square meters, and the spray should be heavier to speed up the lateral thickening of the main stem. Of course, the concentration of spraying and watering will vary according to the temperature, weather changes and the growth conditions of the bean sprouts themselves. When the seedlings are about 10 centimeters tall, keep the sandy soil moist, the air humidity moderate, and spray water reasonably (the water mist can be slightly larger in the later stage), so that the bean sprouts can grow healthily and quickly, and the unshelled bean sprouts can basically grow. During shelling, if the humidity is not enough, the air is dry, and the watercress has not been exposed to moisture for a whole day, the shells and watercress will dry out and stick together, which directly affects the quality of the product. When the height is 12 cm, be prepared to green depending on the temperature.
8. Go green. To turn green is to allow light to enter, allowing the watercress to undergo photosynthesis and increase chlorophyll, causing the watercress to gradually turn from milky yellow to green.
9. Harvesting. The standard for harvesting bean sprouts is that the sprouts are about 15 centimeters tall, the sprouts are neat, the stems are white and green, the leaves are green, the watercress is half-open or slightly open, basically shelled or pine shelled, and the root system is white, clear and clear, with one main whisker and few side whiskers. Or not, there is a little adhesion of river sand when picked up, it can be put on the market after cleaning.