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Preparation principles of nutrient solution for aeroponic cultivation

Industry News

Preparation principles of nutrient solution for aeroponic cultivation

2024-12-24

The preparation of a nutrient solution suitable for aeroponic plant growth should follow the following principles:

1. Balanced nutrition. The formula must contain all the nutrients required for plant growth. Nutrient solution is the main source of mineral nutrition for soilless plants, and it is the only source of nutrition in aeroponics. Among the 16 essential nutrients for plants that have been identified, except for carbon, hydrogen and oxygen, which are provided by air and water, the remaining 13 nutrients such as nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, zinc, copper, molybdenum, boron and chlorine are all provided by mineral nutrition. Some trace elements are required by plants in very small quantities, and the amount required by plants (such as trace elements) is already contained in the contact between water and air, so sometimes no additional addition is required.

2. Good water solubility. All compounds in the nutrient solution formula must be in a form that can be absorbed by plants, that is, they must have good solubility in water to be effectively absorbed and utilized by plants. Most of the compounds generally selected are inorganic salts. A few nutrient solution formulas also use some other organic compounds, such as amide nitrogen urea as a nitrogen source. Other organic fertilizers that cannot be directly absorbed and utilized by plants are not suitable as fertilizer sources for nutrient solutions.

3. Scientific ratio. The quantity and proportion of various nutrient elements in the nutrient solution formula must be suitable for the normal growth needs of plants to ensure effective absorption and balance. When preparing nutrient solution, generally, on the premise of ensuring a complete variety of essential nutrient elements for plants, other trace nutrients should be used as little as possible to prevent excess ions or other impurities in the compounds from affecting the normal growth of plants.

4. High stability. During the planting process, the various compounds in the nutrient solution formula should maintain their effectiveness for a long time and will not reduce their activity in a short time due to air oxidation, root absorption and interaction between ions.

5. Appropriate concentration. The total concentration (salt concentration) of various compounds in the nutrient solution formula should be suitable for the normal growth requirements of plants. Plants will not be lacking in fertilizer due to too low a concentration, nor will they be damaged by salt due to too high a concentration.

6. Acid-base stability. During plant growth, the overall physiological acid-base reaction of the nutrient solution must be relatively stable, and the pH value should be maintained between 5.5-6.6.