| Lewatit® HD 50 is an ion exchange resin loaded with nutrient substances which are necessary for the nourishment of plants, mainly nitrogen, phosphorus and potassium. Lewatit HD 50 is an NPK fertilizer base on ion exchange resin with a long-term effect. It is particularly suited for the continuous nourishment of soil-less cultures of ornamental plants (hydroculture). It is in compliance with the German Fertilizer Decree 2002. It is completely insoluble in water, yet ensures a healthy growth of plants by means of the follow exchange processes. Only some of the salts contained in water, such as calcium and magnesium sulfates, are useful for the nourishment of plants. The large majority of these salts, however, cannot be utilized by the plant, and salts may even be harmful. Lewatit HD 50 adsorbs these non-useful salts and in return, to release nutrient substances into the water. Lewatit HD 50 removes e.g. common salts or calcium carbonate from the water and release e.g. ammonium nitrate or potassium phosphate in return. In the same way, Lewatit HD 50 also provides important trace elements, e.g. iron, manganese, copper, zinc, boron and molybdenum in a ready-to-use form. No matter how large an amount of Lewatit HD 50 is, that has been added to the water, the concentration of salts will not increase. While the salts without nutrient value for the plant contained in the water migrate into the water insoluble ion exchange resin, the corresponding amount of nutrient salts is released into solution. The main advantage of Lewatit HD 50 is that it continuously releases nutrient salts into the water. This release is according to the consumption of the plant. This product thus offers a much wider range of uses than liquid fertilizers for optimum nourishment of plants. According to our experience, 20-30 ml Lewatit HD 50 per 0.5 meter of each plant height is sufficient to ensure complete nourishment fo r3-4 months. The water which evaporates simply needs to be refilled. After 3-4 months, another 20-30 ml of Lewatit HD 50 should be added with the irrigation water to ensure nourishment of the plan for another 3-4 months.Information provided by Lanxess. |
