Iminodisuccinic Acid Chelated Fertilizer (IDS): A Revolutionary Choice for Foliar Fertilizers and Drip - Irrigation Fertilizers

I. Introduction

In modern agriculture, precise fertilization is of great significance for increasing crop yields, improving quality, and protecting the ecological environment. Iminodisuccinic acid chelated fertilizer (IDS), with its unique chelating properties, is gradually emerging in the fields of foliar fertilizers and drip - irrigation fertilizers, providing a new approach to achieving efficient and environmentally - friendly fertilization.

II. Applications of IDS in Foliar Fertilizers

(I) Improving Nutrient Absorption Efficiency

1. Problems in Nutrient Absorption

When plants absorb nutrients through their leaves, they often face the problem that nutrients have difficulty penetrating the leaf cuticle and cell walls. The forms of nutrients in traditional foliar fertilizers are sometimes difficult to be effectively absorbed by leaves, resulting in a large amount of nutrient loss and reducing the fertilizer utilization rate. For example, trace elements such as iron and zinc, when present in the form of simple compounds, are poorly absorbed by plant leaves, and deficiency symptoms are likely to occur.

2. The Mechanism of IDS

IDS has a strong chelating ability and can form stable chelates with various nutrient ions, including trace elements such as iron, zinc, manganese, copper, and macronutrients such as nitrogen, phosphorus, and potassium. These chelates change the form of nutrients, making them more easily absorbed by leaves. Taking iron as an example, the IDS - Fe chelate can enter the interior of the leaf through the stomata and gaps in the cuticle on the leaf surface. Compared with inorganic iron salts, the absorption efficiency is significantly improved. Research shows that after using foliar fertilizers containing IDS chelated fertilizer, the absorption efficiency of iron by plants can be increased by 30% - 50%, effectively alleviating the iron - deficiency chlorosis symptoms of plants.

3. Application Effects

In citrus cultivation, some orchards often experience iron - deficiency symptoms with yellowing leaves. After using foliar fertilizers added with IDS chelated fertilizer, the citrus leaves turn green in a short time, photosynthesis is enhanced, and the fruit quality is improved. The sweetness of the fruit is increased by 1 - 2 degrees, the vitamin C content is increased by 10% - 15%, and at the same time, the fruit size is more uniform, and the commercial value is significantly improved.

(II) Enhancing the Stability of Foliar Fertilizers

1. Stability Issues

Foliar fertilizers are susceptible to environmental factors such as light, temperature, and humidity during storage and use, resulting in nutrient decomposition, precipitation, or volatilization, reducing the quality and effect of the fertilizer. For example, in some boron - containing foliar fertilizers, boron is likely to volatilize and be lost in high - temperature environments, affecting the fertilization effect.

2. The Stabilizing Effect of IDS

IDS can form a stable structure with the nutrients in foliar fertilizers, reducing the impact of environmental factors on nutrients. Through chelation, it wraps the nutrients inside its molecular structure, reducing the activity of nutrients, thereby improving the stability of foliar fertilizers. Experiments show that after storing foliar fertilizers added with IDS for one month at a high temperature of 40°C, the nutrient loss rate is 20% - 30% lower than that of foliar fertilizers without IDS, effectively ensuring the quality and fertilizer effect of foliar fertilizers under different environmental conditions.

3. Practical Application Cases

A flower - growing base used ordinary boron - containing foliar fertilizers in the high - temperature summer. Boron volatilized seriously, and the flowers showed boron - deficiency symptoms, with deformed flowers and a low fruit - setting rate. After changing to foliar fertilizers added with IDS chelated fertilizer, even in high - temperature environments, boron remained stable. The flowers grew normally, with plump and brightly - colored flowers, and the fruit - setting rate increased by 25% - 30%.

(III) Regulating Leaf Physiological Functions

1. The Need for Leaf Physiological Regulation

The physiological functions of plant leaves directly affect their growth, development, and stress resistance. For example, adverse conditions such as drought, high temperature, and low temperature can affect the opening and closing of leaf stomata, photosynthesis efficiency, and enzyme activity, thus affecting the overall growth of plants.

2. The Regulatory Role of IDS

IDS chelated fertilizer not only provides nutrients for plants but also regulates the physiological functions of leaves. It can promote the opening of leaf stomata, increase the absorption of carbon dioxide, and thus improve the photosynthesis efficiency. At the same time, IDS can activate various enzymes in leaves, enhancing the metabolic capacity and stress resistance of plants. Under drought conditions, the relative water content of the leaves of plants using foliar fertilizers containing IDS is 10% - 15% higher than that of plants without it, indicating that IDS helps plants retain water and improve their drought resistance.

3. Application Examples

Wheat planted in arid areas in the north encountered drought during the critical growth period. After using foliar fertilizers added with IDS chelated fertilizer, the photosynthesis of wheat leaves remained at a high level, the plants grew robustly, and the yield increased by 15% - 20% compared with the control field without using this foliar fertilizer.

III. Applications of IDS in Drip - Irrigation Fertilizers

(I) Improving Fertilizer Solubility and Uniformity

1. Challenges in Solubility and Uniformity of Drip - Irrigation Fertilizers

Drip - irrigation fertilization requires fertilizers to have good solubility and uniformity to ensure smooth transportation in the irrigation system and uniform distribution around the crop roots. Some traditional drip - irrigation fertilizers contain insoluble substances, which can easily block the drip - irrigation system and affect the fertilization effect. Moreover, when the fertilizer is unevenly dissolved in water, it will cause excessive or insufficient nutrients in local areas of the crop, affecting the growth consistency.

2. Advantages of IDS

IDS has good water - solubility and can quickly dissolve in drip - irrigation water. At the same time, its chelating effect makes various nutrients in the fertilizer evenly dispersed in the solution, and precipitation and stratification are less likely to occur. Adding IDS chelated fertilizer to drip - irrigation fertilizers can significantly improve the solubility and uniformity of fertilizers. Experiments show that drip - irrigation fertilizers containing IDS can completely dissolve within 10 minutes at a water temperature of 10°C - 30°C, and the solution remains uniform and stable within 24 hours without precipitation.

3. Application Effects

In greenhouse vegetable cultivation, after using drip - irrigation fertilizers added with IDS chelated fertilizer, the clogging frequency of the drip - irrigation system was significantly reduced, from 3 - 4 times per month to 1 - 2 times per month. The vegetables grew more neatly, the consistency of fruit size and quality was improved, and the yield increased by 10% - 15%.

(II) Reducing Soil Nutrient Fixation and Loss

1. Problems of Soil Nutrient Fixation and Loss

Some nutrients in the soil (such as phosphorus, iron, zinc, etc.) are likely to react with minerals in the soil to form insoluble compounds, resulting in nutrient fixation and making them unavailable for crop absorption. At the same time, the leaching effect during irrigation can cause some nutrients to be lost with water, leading to fertilizer waste and environmental pollution.

2. The Role of IDS

IDS chelated fertilizer can reduce the fixation of nutrients in the soil. The chelates it forms with nutrients are relatively stable in the soil and are less likely to react with soil minerals. For example, the IDS - P chelate can reduce the fixation of phosphorus in the soil, keeping more phosphorus in a state available for crop absorption. In addition, the presence of IDS can enhance the adsorption capacity of fertilizers to soil particles, reducing nutrient loss with water. Research shows that after using drip - irrigation fertilizers containing IDS, the amount of phosphorus fixed in the soil is reduced by 25% - 35%, and the nutrient loss is reduced by 20% - 30%.

3. Practical Application Cases

For sugarcane planted in acidic soils in the south, in the past, when ordinary phosphate fertilizers were used, phosphorus fixation was serious, the growth of sugarcane was slow, and the yield was low. After changing to drip - irrigation fertilizers added with IDS chelated fertilizer, the absorption and utilization rate of phosphorus by sugarcane increased, the growth was vigorous, the stems were thick, and the yield increased by 20% - 30%.

(III) Promoting Crop Root Growth and Development

1. The Importance and Challenges of Root Growth

Crop roots are important organs for absorbing nutrients and water, and their growth directly affects the overall growth and yield of crops. However, factors such as pathogens, salinity, and pH in the soil environment may inhibit root growth.

2. The Promoting Effect of IDS

IDS chelated fertilizer can promote the growth of crop roots. It can improve the soil micro - environment around the roots, reduce the activity of soil pathogens, and alleviate the damage of diseases to the roots. At the same time, IDS can regulate the osmotic pressure of root cells, enhancing the root's ability to absorb water and nutrients. In addition, the nutrients in IDS chelated fertilizer can directly provide sufficient nutrition for root growth, promoting the growth and development of roots. After using drip - irrigation fertilizers containing IDS, the root length, root surface area, and root dry weight of crops have significantly increased. For example, after tomatoes use this drip - irrigation fertilizer, the root length increases by 20% - 30%, the root surface area increases by 15% - 20%, the roots are more developed, and the plants grow robustly.

3. Application Examples

Cotton planted in saline - alkali land, due to the high soil salinity, root growth was inhibited. After using drip - irrigation fertilizers added with IDS chelated fertilizer, the cotton roots gradually adapted to the saline - alkali environment, the growth condition was significantly improved, the lodging resistance of cotton was enhanced, and the yield increased by 15% - 20%.

IV. Conclusion

Iminodisuccinic acid chelated fertilizer (IDS) shows significant advantages in the fields of foliar fertilizers and drip - irrigation fertilizers. By improving nutrient absorption efficiency, enhancing fertilizer stability, regulating leaf physiological functions, improving fertilizer solubility and uniformity, reducing soil nutrient fixation and loss, and promoting crop root growth, it provides strong support for precise fertilization in modern agriculture. With the deepening of the concept of sustainable agricultural development, IDS chelated fertilizer is expected to be more widely used in the future, promoting the development of agricultural production towards a more efficient, environmentally - friendly, and green direction.