How to deal with seed seeding before seeding in Chinese herbal medicine? What are the precautions for seed dressing? In order to improve the seed quality of Chinese herbal medicines, control seed pests and diseases, break seed dormancy, promote seed germination and seedling growth, Chinese herbal medicine seeds should be treated before planting. The main conventional treatment methods are as follows.
- Select seeds to select seeds that are full of particles, well-developed, do not carry pests and eggs, and have strong viability. The amount of seed can be selected by hand, and the amount of seed can be selected.
- Sun-breeding before sowing can promote the physiological ripening of certain medicinal seeds, accelerate the internal metabolism of seeds, increase the seed survival rate, germination potential and germination rate, and play a role in sterilization and elimination of scorpion venom. Sun drying is generally selected for 2 to 3 days in sunny weather. When drying on the concrete floor, be careful not to spread too thin to prevent scalding the seeds, generally 3 to 5 cm; turn every 2 to 3 hours to make The seeds are evenly heated.
- Soaking seeds with cold water or about 40 kinds of warm water for direct soaking, can make the seed coat aging, permeability enhancement, and can kill the bacteria inside and outside the seeds, prevent the spread of disease, and promote the seeds to germinate quickly and neatly.
Better seed treatment if chemical substances are used directly during soaking
- Treated with growth hormone. Commonly used hormones are indole acetic acid, gibberellin and the like.
- Add trace elements to the water. Common trace elements are boron, zinc, manganese, copper, molybdenum and the like.
- Scuffed and broken shells. Some herbs are hard, rich in wax and impervious to water, affecting seed germination. It is often used to damage the seed coat by artificial shelling, rubbing, etc., which can promote germination. For example, Eucommia ulmoides can be used to remove the seed kernels and directly seeded; the seed coats of Astragalus and Andrographis paniculata are waxy, which can be first rubbed with fine sand and then soaked with warm water to significantly increase the germination rate.
- Lamination processing. That is, a layer of wet sand, a thin layer of seed, and then a layer of wet sand, and then a thin layer of seed, so repeated stacking treatment, can break the seed dormancy, promote post-ripening and germination. Seeds such as peony, berberine, and ginkgo are commonly used to promote germination.
Seed dressing is generally carried out with chemicals, which can play the role of sterilization, promotion and absorption.
- Commonly used 50% carbendazim seed dressing, can kill the surface of the seed and the bacteria in the soil, prevent bacterial catastrophic disease, the amount of 3 to 5 grams per 500 grams of seeds mixed well.
- The use of bacterial fertilizer for seed dressing can increase beneficial microorganisms in the soil, and can convert elements that cannot be directly utilized by plants in the soil and air into nutrients that can be absorbed and utilized by plants, thereby promoting the growth and development of Chinese medicinal materials. Common bacterial fertilizers include rhizobium agents and nitrogen-fixing bacteria agents.
In addition to the above-mentioned commonly used seed treatment methods, it is also possible to treat the seeds of the medicinal materials by high-tech techniques such as radiation and ultrasonic waves, and all of them have the functions of promoting seed germination, vigorous growth, and early maturity increase.
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