What method does astragalus seed have to deal with?

What method does astragalus seed have to deal with? Please introduce the method that astragalus seeds are hard and solid, and the hard seed rate is generally 40% 80%. The emergence rate is low after sowing. Seed treatment must be carried out before sowing to break the impermeability of seeds and improve the emergence rate of sowing. There are three methods of seed treatment, one of which can be chosen. 1, water temperature change soaking seeds: a few days before sowing, soak in 40 ℃ warm water during the day, change cold water at night, deal with it continuously for three days and nights, fish it out and put it into a jar, cover it with a wet cloth and put it in a warm place to promote germination. The seeds can also be rapidly stirred in boiling water for one minute, immediately poured into cold water, the water temperature is set to 40 ℃, soak for another 2 hours, pour out the water, cover the wet sack for 12 hours, and sow when the seed expands or the outer skin breaks. 2. Mechanical damage: mix 1 part of fine river sand and 2 parts of seeds evenly, put them on a medium-sized mill, spread them 3-4 cm thick, and grind them until the seed coat burrs. After grinding, the seeds were screened, soaked in 20 ℃ warm water for one day, piled in a warm place, germinated in about 5 days, and then sowed. Be careful not to grind the seeds too much, otherwise the embryos will be injured, the seeds will be easily infected by germs, there are many rotten seeds after sowing, and the emergence rate is not high. 3. Sulfuric acid treatment: for mature and hard seeds, soak them in 70% of 80% sulfuric acid solution for 5 minutes, rinse them in running water for half an hour, or wash the residual sulfuric acid on the seeds with clean water for half an hour. The germination rate can reach more than 90% after slightly drying. Click to get more planting techniques of Radix Astragali