The use of organic compounds to encapsulate trace elements such as zinc, making it less susceptible to loss of chelation technology has long been recognized as the best choice to enhance the competitiveness of trace element fertilizers. However, recent authoritative experts in China quoted the results of the University of Istanbul as saying that trace element zinc chelation is meaningless because zinc sulfate (inorganic salt) has more effect on crops than chelated zinc (chelating state).
Dr. Fan Mingxian, director of the International Zinc Association and China Zinc Nutrition Project, told the reporter that the zinc ion of zinc sulfate is the main form of zinc absorption by plants. The zinc chelate can slow the fixation of zinc to the soil and facilitate the transport of zinc to the roots, but in the absence of zinc. The results of soil cultivation, hydroponic culture and foliar spraying showed that the zinc sulfate foliar application increased the zinc concentration of crop grains up to 75ppm, which was significantly higher than that of Zn-EDTA. The test showed that zinc sulfate had better effect than chelate zinc.
"At present, some fertilizer innovations have misunderstandings, blindly chasing foreign brands, speculation concept, not effective, simply think that the price of chelated zinc is expensive, selling water-soluble fertilizer into high-priced fertilizer, developing domestic water-soluble fertilizer market and rational use of water-soluble fertilizer It’s not good.â€
It is understood that due to the high cost of trace elements in the chelated state, the trace elements in the true chelated state are only present in a very small number of high-quality fertilizers, especially high-quality water-soluble fertilizer, foliar fertilizer, drip irrigation and fertilization. For compound fertilizers with low price and low profit, most manufacturers will not add trace elements in the chelated state.
Regarding the chelation of trace elements, Gao Xiangzhao, the chief expert of the National Agricultural Technology Center, told reporters that the role of medium and trace elements is not only the supply of nutrients, but more importantly, the physiological and biochemical processes involved in the crops.
At present, domestic research on chelated trace elements only stays in aqueous solution, how to convert chelating trace elements into soil, how to absorb roots, how to convert to chlorophyll (most trace elements are related to photosynthesis), and in the environment. There are few studies on how to convert and other topics.
“The results of scientific research at Istanbul University show that zinc chelation has no meaning, so is it not meaningful to chelate iron and manganese?†Gao Xiangzhao called for domestically produced research and development to conduct chelation with chemically synthesized chelating agents such as EDTA, DTPA and EDDHA. The topic of zymatic trace elements in environmental transformation and human health effects.
In addition, experts in the Trace Element Research Center of Huazhong Agricultural University, a well-known research institution for medium and trace elements, said that the existing compound fertilizer plants and water-soluble fertilizer plants only mix the inorganic salts of various elements in proportion, ignoring the side reactions between the elements. Although this adds a lot of trace elements, it can be effectively absorbed by crops.
This article URL: trace element zinc chelation has no meaning inorganic salt state effect exceeds chelation state
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