现代农业的发展对肥料的施用提出了更高、更新的要求。传统农业中肥料的主要作用是提高作物产量，而随着现代农业的发展，施肥的技术和目的发生了很大的变化，施肥不仅要能增产，还要能改善作物品质、节省资源，有利于培肥地力、调节土壤结构、减轻劳动强度，更重要是要能提高肥料利用率，减少环境污染，提高经济效益，有利于绿色农业和可持续发展。

The development of modern agriculture puts forward higher and newer requirements for fertilizer application. The main role of fertilizer in traditional agriculture is to improve crop yield. With the development of modern agriculture, the technology and purpose of fertilization have changed greatly. Fertilization should not only increase production, but also improve crop quality and save resources, which is conducive to fertility improvement, soil structure adjustment, labor intensity reduction, and more importantly, it can improve fertilizer utilization rate, reduce environmental pollution, and improve the utilization rate of fertilizer High economic benefits, conducive to green agriculture and sustainable development.

传统上对微量元素铁、锌、锰等元素的补充，使用其无机盐形式，如硫酸锌、硫酸亚铁和硫酸锰等，但存在有很大的问题(如硫酸亚铁在自然条件下极易转化为三价铁而失去作用，硫酸锌、硫酸锰极易流失)，应用范围较窄、效能低下，不利于作物吸收，而且由于土壤的自身碱性反应和氧化还原反应，使之形成难溶的氢氧化物等，降低其生物学活性，不但起不到补充微量元素的作用，而且还会造成土壤板结，不利于环境保护和农业的可持续发展。

Traditionally supplement for trace elements Fe, Zn, Mn and other elements, use the form of inorganic salt, such as zinc sulfate, ferrous sulfate and manganese sulfate, but there is a lot of problems, such as ferrous sulfate under natural conditions can easily be converted into ferric iron, zinc sulfate, manganese sulfate easy lose efficacy), narrow application range, low efficiency, bad for crop absorption, and because of alkaline soil and REDOX reaction, make the formation refractory of hydroxide, etc., reduce its biological activity, not only trace element supplement no effect, but also can cause soil harden, is not conducive to environmental protection and the sustainable development of agriculture.

钛和稀土元素是近年来植物科学施肥出现的新亮点，其作用是强有力地促进植物对N、P、K和其他微量元素的吸收和运转，增进其活性，增强光合作用，提高植物叶绿素和果实养分的含量，但无机钛盐性质不稳定，易在自然条件下生成不溶于水的二氧化钛，不被植物吸收利用，难以发挥其“肥料催化剂”的作用。

Titanium and rare earth elements are the new highlights of plant scientific fertilization in recent years. Their functions are to strongly promote the absorption and transportation of N, P, K and other trace elements, enhance their activity, enhance photosynthesis, and increase the content of chlorophyll and fruit nutrients. However, the nature of inorganic titanium salts is unstable, and it is easy to form water-insoluble titanium dioxide under natural conditions, It is difficult to play the role of "fertilizer catalyst" by absorption and utilization.

国内外对微量元素的使用和研究已进行了大量的工作，市面上也出现了少量的有机微量元素肥料，部分弥补了无机肥的不足，但大多数存在着生物学活性差，适应范围窄的缺点，如有机酸铁、乳酸锌，葡萄糖酸锌等。近年来还有许多对有机螯合肥的研究，主要是螯合剂的选择应用，市面上以EDTA螯合态微肥为主，还有少量进口DTPA螯合肥，HEDTA螯合肥，EDDHA螯合肥等系列产品。不同的螯合剂各有不同的特点，在不同作物和土壤中应用效果有所不同。

A lot of work has been done on the use and research of trace elements in the world. A small amount of organic trace element fertilizers have appeared in the market, which partly make up for the deficiency of inorganic fertilizers. However, most of them have the disadvantages of poor biological activity and narrow adaptability, such as organic iron, zinc lactate, zinc gluconate, etc. In recent years, there have been many studies on organic chelating agents, mainly on the selection and application of chelating agents. The market is mainly composed of EDTA chelated micronutrient fertilizer. There are also a small number of imported DTPA chelating fertilizer, HEDTA chelating fertilizer, eddha chelating fertilizer and other series of products. Different chelating agents have different characteristics and have different application effects in different crops and soils.

施肥技术主要根据肥料形态和剂型，目前主要有固体和液体两种形态，施用以根施和喷雾两种，存在着固体肥料溶解差或溶解慢，沤肥底部有沉淀物，使用起来产生诸多不便，不仅常堵塞喷头，更重要是利用效率低，时效短，液滴易随风和重力自然滑落且被氧化而不利吸收。

Fertilizer technology is mainly based on the form and dosage form of fertilizer. At present, there are two forms of solid and liquid. When applying two kinds of root and spray, the solid fertilizer is dissolved or dissolved slowly, and there is sediment at the bottom of the compost. There is a lot of inconvenience in using it. Not only does it often clog the nozzle, but also the efficiency is low and the time is short. droplet easy to wind and gravity natural slip and be oxidized and adverse absorption.

目前国内微肥技术的发展水平极低，市场急需生物活性强，适用范围广，符合绿色农业和可持续发展的微肥产品及新的剂型以改变传统施用技术，开发新型螯合剂和系列螯合态肥料，并加工成新剂型可提高微量元素的使用效率，降低盲目施肥的环境污染和浪费，减轻劳动强度，降低成本，利于绿色农业和可持续发展。

At present, the development level of micro fertilizer technology in China is very low. The market urgently needs micro fertilizer products and new dosage forms with strong biological activity and wide application range. In order to change the traditional application technology, develop new chelating agents and series of chelating fertilizers, and process them into new formulations, can improve the use efficiency of trace elements, reduce the environmental pollution and waste, and reduce the environmental pollution and waste caused by blind fertilization, reduce labor intensity and costs, conducive to green agriculture and sustainable development.