1. Introduction
Granular chelated microelement is a special micro-fertilizer for high-efficiency agriculture. It adopts the double chelation technology of amino acid + fulvic acid to stably encapsulate trace elements such as zinc, copper, iron, manganese, and boron inside the particles. Its granular structure is solid and evenly distributed, suitable for various fertilization methods such as drip irrigation and broadcasting, and is widely used in grain crops, fruits and vegetables, tea, cash crops and other fields.
Composition:
Cu 0.5%, Fe 2%, Mn3%, Zn5%, Mo 0.2%, B 1%
2. Features
High Absorption Rate
Granular chelated microelement improves the dissolution and absorption efficiency of trace elements in the rhizosphere through the dual chelation technology of amino acid + fulvic acid, effectively avoiding the antagonism between Zn, Fe, Cu, and Mn, and the crop absorption rate can reach more than 90%.
Slow Release And Long-term Effect
The fertilizer granules adopt homogeneous coating technology, and nutrients can be continuously released within 10 to 30 days, reducing the frequency of fertilization and improving the stability of nutrient supply.
Balanced Ingredients
Granular chelated microelement contains 0.5% copper, 2% iron, 3% manganese, 5% zinc, 0.2% molybdenum, and 1% boron. It meets the trace element needs of various crops and effectively prevents deficiency symptoms such as yellow leaves, fruit drop, and deformed fruits.
Manufacturing Process
Raw Material Preparation And Proportioning
First, select a high-purity trace element source, such as iron, zinc, copper, manganese, etc., and proportion it with a suitable chelating agent (such as EDTA, DTPA, etc.). The selection of chelating agents is crucial to the stability and absorption efficiency of the product. According to the product specifications, accurately calculate the proportion of each raw material to ensure that the trace element content meets the standard. Usually, the trace element content is between 20%-30%, and the proportion of the chelating agent is controlled within an appropriate range to ensure that its chelating effect is maximized.
Dissolution And Chelation Reaction
In an efficient stirring device, the trace element raw material is mixed with the chelating agent, and an appropriate amount of solvent (such as water) is added, and heated to a suitable temperature (about 40-60°C) to allow the trace elements in the raw material to react chemically with the chelating agent. In this process, the chelating agent firmly "wraps" the trace elements in the molecular structure to form a stable chelate, prevents the elements from reacting adversely with other soil components, and ensures that they can be effectively absorbed by plants.
Granulation Treatment
After the chelation reaction is completed, the solution is granulated by spray drying or granulation equipment. Spray drying atomizes the solution into fine droplets and evaporates the water quickly at high temperature, so that the trace element particles can be crystallized quickly. Another commonly used method is granulation, which is to make chelates into granules by physical methods such as extrusion and rolling. These granules are usually controlled between 1-5 mm for easy application and storage. Granular products can not only better preserve nutrients, but also ensure uniform release of nutrients during fertilization.
Drying And Cooling
The granular products will be further dried to remove excess moisture and prevent adhesion or accumulation between particles. The drying process is usually carried out at 40-60℃ to ensure that the product is dried evenly and the trace elements in the chelate are not destroyed. The dried granules will be cooled to room temperature to ensure that they are not affected by external temperature changes during subsequent packaging and transportation.
Precautions For Use
Reasonable Application Amount
Application amount is an important factor affecting the effect of granular chelated trace element fertilizer. According to the actual soil conditions and crop growth requirements, excessive or insufficient application may affect the effect of fertilizer or cause resource waste. The generally recommended application amount is 10-15 kg per hectare, but the specific amount needs to be adjusted according to soil test results and crop types.
Suitable Application Time
Particle chelated trace element fertilizer should be applied during the critical period of plant growth, especially in the early growth period and flowering and fruiting period. At this time, the plant has a large demand for trace elements and the fertilization effect is best. The application time should avoid heavy rain or high temperature weather to avoid affecting the dissolution of fertilizer and plant absorption.
Application Method
Particle chelated trace element fertilizer can be applied by broadcasting, mixing with soil or watering. When broadcasting, it is best to spread the fertilizer evenly on the soil surface and gently plow to help the particles better contact with the soil. When used for integrated water and fertilizer irrigation, ensure that the fertilizer is completely dissolved so that it can be transported to the root zone through water flow. When using, avoid direct contact between fertilizer and plant leaves or tender roots to avoid harming the plant.
Avoid Mixing With Other Fertilizers
When applying granular chelated trace elements, avoid direct mixing with fertilizers containing substances such as calcium and magnesium. These elements may react with trace elements, resulting in reduced chelation effect, thereby reducing the absorption efficiency of fertilizers.
Storage And Preservation
Granular chelated trace elements should be stored in a dry and cool environment, avoiding high temperature and humidity. The product packaging should be kept intact to prevent moisture or contamination from affecting its quality. The correct storage method can ensure that the fertilizer remains efficient during use and avoid the reduction of fertilizer efficiency due to improper storage. Especially in a humid environment, the particles are prone to moisture absorption and agglomeration, affecting the use effect.
Regularly Monitor Soil Conditions
In order to ensure the effectiveness of fertilization, it is recommended to test the soil regularly to understand the changes in the content of trace elements in the soil. Different types of soil have different requirements for trace elements. Regular testing can help adjust the amount and frequency of fertilization, thereby improving the absorption efficiency of nutrients by crops. Before applying granular chelated trace element fertilizers, soil pH, effective mineral content and soil fertility level need to be considered.
FAQ
Q: Why are chelated trace elements so important for plants?
A: Chelated trace elements are essential for plant growth because they are cofactors for enzymes involved in important processes such as photosynthesis, nitrogen fixation, and respiration. Although these trace elements are required in small quantities, they are essential for the proper development of plants.
Q: How do chelated trace elements improve nutrient absorption in plants?
A: Chelation keeps trace elements in a soluble and stable state, preventing them from precipitating in the soil. This makes nutrients more accessible to plant roots, even in alkaline or highly acidic conditions where non-chelated nutrients may become unavailable.
Q: What types of trace elements are commonly chelated?
A: Common chelated trace elements include iron (Fe), manganese (Mn), zinc (Zn), copper (Cu), boron (B), molybdenum (Mo), and chlorine (Cl). These elements are essential for various metabolic functions of plants.
Q: How are granular chelated trace elements applied to plants?
A: Granular chelated trace elements are usually applied to the soil by broadcasting or mixing into the topsoil. They can also be applied directly around the root zone of plants. The granules will gradually dissolve, releasing nutrients over time.
Q: What are the advantages of using granular chelated trace elements over other forms of fertilizers?
A: Granular chelated trace elements have a slow-release property, which can reduce the risk of nutrient loss and provide a steady supply of nutrients to plants. They also reduce nutrient retention in the soil, especially in soils with high pH or clay, where other forms of fertilizers may not be effective.
Q: Can granular chelated trace elements be used with other fertilizers?
A: Yes, granular chelated trace elements can be used with other fertilizers. They can supplement standard NPK fertilizers and provide essential trace elements that are often missing in general-purpose fertilizers.
Q: Under what specific conditions should granular chelated trace elements not be used?
A: Granular chelated trace elements should be used with caution in soils that are already high in trace elements. Over-application can lead to nutrient imbalance or toxicity, especially for sensitive plants.
Q: How long do granular chelated trace elements last in the soil?
A: Granular chelated trace elements typically release nutrients slowly, over a period of time ranging from a few weeks to a few months, depending on the temperature, moisture, and microbial activity of the soil. This long-term release helps maintain a continuous nutrient supply for plants.
Application cases:
Apples need a lot of trace elements for growth and development.
Adequate nutrition of granular chelated trace elements can reduce the occurrence of apple black spot and significantly improve the quality of apples.
Spray 30 kg/hectare around fruit trees in spring, and spray another 30 kg/hectare after the budding period.
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