Chinese herbal medicine seed dressing three types of fertilizer should not be used

1. Fertilizers with toxic effects Mainly the most used urea in crop production. In the process of crop production, urea often produces a small amount of biuret. The content of this substance is more than 2%, which will cause toxicity to seeds and seedlings. In addition, urea molecules with high nitrogen content will also penetrate into the protein molecular structure of the medicinal seeds, which will deform the protein and affect the germination of the seeds.
Second, the fertilizer containing harmful ions One type is potassium chloride, ammonium chloride. Such fertilizers contain chloride ions, which, when applied, produce water-soluble chlorides that are detrimental to seed germination and seedling growth. The other class is ammonium nitrate and potassium nitrate. Because it contains nitrate ions, it has a great influence on seed germination.
3. Fertilizers containing corrosive effects such as ammonium bicarbonate and superphosphate. If such fertilizers are used as seed fertilizers for the cultivation of Chinese medicinal materials, the germination and seedlings of the seeds will cause serious harm. If the soil quality is poor, it is necessary to apply this kind of fertilizer. It can be applied under the ditch or the bottom layer, covered with a layer of fine soil and then spread the seeds of the medicinal material. It can also be applied after mixing the superphosphate and the soil fertilizer. In the cultivation of Chinese medicinal materials, direct contact between such fertilizers and seedlings of medicinal seeds should be avoided.

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