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The substance is more than 2% and is toxic 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 (1) 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. (2) Ammonium nitrate and potassium nitrate. Containing 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 use 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 herbs. It can also be applied after mixing the superphosphate and the soil fertilizer.
Chinese medicinal materials are special crops. If the fertilizer is used improperly during cultivation, it is prone to germination and burning, which causes unnecessary economic losses. Therefore, it is not advisable to use three types of chemical fertilizers as "fertilizers" for Chinese herbal medicines during seed dressing. 1. Fertilizers containing toxic fertilizers In the process of crop production, a small amount of biuret is often produced.
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