Treatment methods of licorice seeds
1. Sulfuric acid treatment. Stir the pure seeds with 20-30 milliliters of 80% sulfuric acid per kilogram. See that the seed coat has uniform marks of sulfuric acid etching, then rinse with clean water and dry for use. The time of seed treatment is related to the temperature and the amount of acid added. In the case of the same amount of acid, the treatment time is short when the air temperature is high, and the treatment time is long when the air temperature is low. If more acid is added, the treatment time will be short, otherwise the treatment time will be long.
Second, the method of crushing the seed coat. Put the seeds on a grinding plate, 3 cm thick, turn with the grinder, when the seed coat is yellow and white, then soak the crushed seeds in warm water of 40 ℃ for 2-4 hours, remove them and rinse off the mucus with clean water to sow.
Third, wet sand burial method: first soak the seeds in 70 ℃ of warm water for 8-10 hours, then bury them in wet sand, cover them with a wet cloth or straw curtain, sprinkle water frequently, and keep moist. When the temperature rises to 18-20 ℃, take out and sow seeds. This method should be carried out 50-60 days in advance.
Heating and re-immersion method
Fourth, soak the seeds in 60 ℃ of warm water for 6 hours for 8 hours, when most of the seeds are full of water absorption (accounting for 2), and the unsoaked seeds (unsoaked hard seeds) are separated into two layers, the unsoaked seeds are under, the soaked seeds are on the top, but do not float on the surface, and the soaked seeds can be bleached out while pouring water, repeated several times, until all the soaked seeds are bleached out for use. Soak the unopened seeds in 100 ℃ boiling water for 2 seconds, remove them, immediately put them into cold water to stimulate the seed coat, and then soak the seed coat in 60 ℃ warm water for 2 hours. At this time, the seeds have been treated, together with the bleached seeds, rinse off the mucus with clean water, and then sow the seeds. The germination rate of licorice seeds treated by heating and re-soaking method reached 91.3%, and the seedling emergence rate reached 90%.
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Skillful treatment of licorice seeds
The treatment of the seeds of traditional Chinese medicine before sowing can prevent and control diseases and insect pests, improve the germination rate, and play an important role in Miaoqi, Miaoquan, and Miaozhuang. it is the primary prerequisite for stable and high yield, and generally the yield can be increased by 5% and 20%. In this paper, the treatment methods of licorice seeds are introduced as follows: licorice seeds are thick and hard, and the seeds are not easy to germinate and can destroy the epidermis. There are three methods: ① uses the high-speed rolling of the rice mill to make the seeds rub and collide with each other and injure the epidermis (suitable for a large number of seeds); ② grinds seeds and coarse sand together for 5 minutes (suitable for a small number of seeds)
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Seed treatment of Glycyrrhiza uralensis
Licorice seeds begin to germinate at 10-15 degrees, and 15-20 degrees germinate most quickly, and the germination rate of aged seeds decreases. One of the biggest characteristics of licorice is the hard seed phenomenon, which is usually between 70 and 90 percent, and it is difficult to emerge after sowing, so when seeds are propagated in production, they must be treated before sowing. The general treatment methods are as follows: ⑴ soaking seeds in boiling water, ⑵ concentrated sulfuric acid soaking seeds, ⑶ broken glass grinding. ⑷ rice mill, among which the rice mill has the best grinding effect. Generally, the rice mill is used 1-2 times before sowing.
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