Ethylenediaminetetraacetic acid (EDTA) series of chelating agents mainly include EDTA, EDTA series sodium salts, EDTA series potassium salts, and EDTA series metal salts. As an important chemical product, it has a wide range of uses.
In recent years, research on EDTA has become more and more in-depth, and new uses of EDTA have been continuously developed. With the increasing use of EDTA chelating agents, the market demand continues to increase, and the synthesis process of EDTA has also been continuously improved.
EDTA series chelating agents are widely used in cleaning, medicine, agriculture, food, and other fields due to their own chelating properties, stability, and mature synthesis process. In particular, the application of synthetic micro-fertilizers in agriculture is more and more extensive. With the development of agriculture in my country, the application of the EDTA series micro-fertilizers will receive more attention.
Application of EDTA in Agricultural Production
With the research on the nutrients and fertilizers necessary for crops, it is found that trace elements play an important role in promoting the growth of crops and the absorption of nitrogen, phosphorus, and potassium. Farmers are paying more and more attention to the role of trace element fertilizers.
Inorganic salt micro-fertilizers have shortcomings such as low utilization rate, while the Cu, Ca, Fe, Mg, Zn, and other metal salts of the EDTA series of chelating agents have the advantages of good solubility and easy absorption, and become a good source of micro-fertilizers. In addition, these chelated metal salts do not affect their solubility properties after being mixed with each other, which is beneficial to use as a multi-element composite micro-fertilizer.
The development of EDTA chelated organic micro-fertilizer enhances the beneficial synergistic effect between trace elements, improves biological activity, and is easily absorbed by plants.
Considering the cost and effect comprehensively, EDTA will be the first choice for chelated micro-fertilizers for a long time, so the amount of use in our country is also increasing, and the scope of application is also expanding.
EDTA Chelated Fertilizer
Due to its excellent chelating properties, EDTA can effectively bind metal cations in a wide pH range, and form new substances through chelating reactions.
Although iron in the soil has high reserves, it is rarely effectively absorbed and utilized by plants, so plants are prone to iron deficiency, especially in arid and semi-arid calcareous soils, where iron deficiency is more serious.
Foliar spraying of Fe-EDTA or Fe-HEDTA chelated fertilizer can significantly increase the amino acid content of leaves, which is more effective than ferrous sulfate. Fe-EDTA is one of the most widely used chelated iron fertilizers, which has a more significant effect on improving plant quality.
The chelated zinc fertilizer Zn-EDTA can significantly increase the potential effective zinc components in the soil, and the slow release of the chelated zinc fertilizer can be maintained until the wheat is harvested, ensuring that the soil has a long-term zinc supply capacity.
Although EDTA series chelating agents are difficult to degrade and may have a negative impact on the environment. Considering the comprehensive benefits such as cost, EDTA series chelating agents will not be replaced for a long period of time in the future, and will still play an important role.