Skillful treatment of licorice seeds
Before sowing, the seeds of Chinese medicinal materials are treated to prevent diseases and insect pests, improve germination rate, and have great effect on seedling uniformity, seedling integrity and seedling strength. It is the first prerequisite for stable and high yield, and generally can increase yield by 5%-20%. The treatment methods of licorice seeds are introduced as follows: licorice seeds have thick and hard skin, seeds are not easy to germinate, and the skin can be destroyed. There are three methods: ① The seeds are rubbed and collided with each other by the high speed rolling of the rice mill, and the skin is damaged.(Suitable for large amount of seed treatment);② Mix seeds and coarse sand together and grind for 5-10 minutes (suitable for small amount of seed treatment);③ Add 80% sulfuric acid 20- 30ml per kilogram of seeds and stir evenly, rinse with clean water after 4-7 hours, and sow after drying.
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How to deal with licorice seeds?
At present, there are the following methods used in production: (1) sand grinding method: the licorice seeds and clean river sand are mixed at a ratio of 1 to 1, put into a container, stirred repeatedly to make them rub, and can be sown when the seed coat is not bright. This method is labor-consuming and is only suitable for the treatment of a small number of seeds. (2) Rice milling machine treatment: licorice seeds were milled with electric rice grinder for 3 times in order to cut the seed coat and keep the seed unbroken. (3) heating and re-soaking method: soak the seeds in 60 ℃ warm water for 6-8 hours, bleach out the seeds that have been soaked in the upper layer by the "rice washing method", and then rinse the seeds in the lower layer.
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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 seed on the grinding plate, 3 cm thick, turn with the mill, and when the seed coat is crushed, it will be yellow and white.
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