Chelate fertilizers efficiently transport trace elements to crops through chelating agents such as sugar alcohols and humic acid, and the utilization rate is 2-3 times higher than that of traditional fertilizers. It can not only increase the yield by 20%-30%, but also enhance the ability to resist drought and disease, and increase the VC content of Chinese cabbage by 15%.
Importance of trace element fertilizers
With the deepening of intensive agricultural planting, the problem of trace element deficiency has gradually surfaced, which has also prompted people to pay more attention to the application method of trace elements. In the market, chelate fertilizers are highly praised for their ability to effectively improve the utilization rate of trace elements. Chelate fertilizers are carefully made by chelating essential trace elements such as zinc, iron, manganese, and copper for plants. Compared with traditional inorganic salt trace elements, chelate metal elements show superior biochemical stability, can significantly reduce the mutual antagonism between nutrients, and their utilization rate is two to three times higher than that of inorganic ions. In addition, according to the different fertilizer requirements of crops, the application ratio of the corresponding metal element chelate fertilizer can be flexibly adjusted. This series of advantages makes chelate fertilizer an ideal choice for the development of agriculture in my country.
Preparation characteristics of chelate fertilizer
The preparation of chelate fertilizer mainly relies on ligands such as ethylenediaminetetraacetic acid (EDTA), N-β-hydroxyethylethylenediaminetriacetic acid (HEDTA), citric acid, amino acids, humic acid and sugar alcohols. These ligands are tightly bound to the metal elements required by plants, such as zinc, iron, manganese, copper, etc., through coordination bonds to form chelates with a clamp-shaped ring structure. Among them, sugar alcohols, as the initial product of plant photosynthesis, show significant advantages as chelating agents. Unlike traditional calcium fertilizers that can only be absorbed through the fruit surface, sugar alcohol chelate calcium fertilizers can be absorbed through both leaves and fruit surfaces at the same time, thereby ensuring that calcium can enter the fruit efficiently.
In addition, chelate trace element fertilizers have a significant promoting effect on the absorption of crop nutrients and can ensure that these elements are reasonably distributed in various organs of crops. This not only helps to increase crop yields, but also significantly improves the quality of agricultural products. For example, small molecular organic substances such as chelating agents such as sorbitol and mannitol can directly enter the leaves with trace elements, thereby greatly improving the transport capacity of trace elements in the plant body.
Effects and applications of chelate fertilizers: promoting crop absorption and increasing yields
Chelate calcium fertilizers developed with sugar alcohols as adjuvants have performed well in promoting crop nutrient absorption, increasing crop yields and improving the quality of agricultural products. At the same time, chelating agents such as humic acid can not only promote plant growth and development due to their active groups such as carboxyl, phenolic hydroxyl, and quinone groups, but also significantly improve crop resistance to drought, salt and alkali, low temperature/high temperature, and disease.
A large number of studies have further confirmed that the application of chelate trace elements has a significant effect on improving crop yield and quality. For example, adding amino acid chelate magnesium to compound fertilizers can effectively increase the content of chlorophyll, soluble sugar, soluble protein, and VC in Chinese cabbage. In arid environments, the application of chelate trace elements can not only increase the content of chlorophyll, soluble sugar and soluble protein in crops, but also reduce the content of malondialdehyde, thereby promoting root growth, increasing the specific surface area of root hairs, further expanding the root system’s absorption range of nutrients, and ultimately increasing crop biomass and yield.
The application of chelate fertilizers improves the quality of agricultural products and enhances the crop’s resistance to drought, salt and alkali, and other stresses. For example, the application of chelate trace element fertilizers can effectively improve the adaptability and yield performance of crops under adverse conditions, thereby providing strong support for the sustainable development of agriculture.
