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Discover our full range of eco-friendly fertilizers, including amino acid granular fertilizer, blended and controlled-release fertilizers, microbial agents, and coated urea. Designed for field and cash crops, our products improve nutrient efficiency, soil health, and sustainable agricultural yields.

Ammonium Sulfate
Ammonium Chloride
Calcium Ammonium Nitrate
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Ammonium Sulfate Fertilizer

Ammonium Sulfate Fertilizer

As a professional fertilizer manufacturer and supplier from China, RONGDA (Tianjin Rongda Fertilizer Co., Ltd.) has evolved into a modern environmental protection ecological fertilizer enterprise with years of development. Its core product, Ammonium Sulfate Fertilizer, is a high-quality quick-acting nitrogen fertilizer that meets green environmental protection standards. With stable nutrient content, excellent physical properties and wide applicability, it can efficiently meet the nutrient needs of various crops, especially sulfur-loving ones, while improving soil quality and ensuring agricultural sustainability.
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Agricultural Ammonium Sulfate

Agricultural Ammonium Sulfate

Rongda Agricultural Ammonium Sulfate is a fast-acting fertilizer with clearly defined nutritional components and stable performance, meticulously crafted by a leading Chinese fertilizer company. Its core advantage lies in its scientifically formulated nutrient ratio, containing approximately 21% nitrogen and 24% sulfur. This precisely meets the critical needs of crop growth, promoting vigorous growth and enhancing resistance to adverse conditions.
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Fertilizer For Alkaline Soils

Fertilizer For Alkaline Soils

Alkaline soil has long plagued farmers engaged in agricultural planting, as it not only inhibits crop growth but also significantly reduces the effectiveness of fertilizer application. To address this critical issue, Rongda, a professional manufacturer from China, launches a specialized Fertilizer For Alkaline Soils. This product features unique physiological acidity, which can gently and steadily adjust the pH value of alkaline soil.
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Sulfur-Deficient Soil Conditioner

Sulfur-Deficient Soil Conditioner

Rongda Sulfur-Deficient Soil Conditioner is a practical product developed to address the problem of sulfur deficiency in agricultural soils caused by the long-term use of high-concentration sulfur-free fertilizers, which leads to poor crop growth. Its core function is to replenish the missing sulfur in the soil, using sulfate sulfur that is easily absorbed by crops. It can quickly alleviate sulfur deficiency symptoms such as yellowing of new leaves and slow growth, improving crop yield and quality.
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Physiologically Acidic Fertilizer

Physiologically Acidic Fertilizer

Rongda Physiologically Acidic Fertilizer is a widely recognized soil improvement product in the agricultural industry. Its core advantage lies in gently regulating soil pH through the crop's own absorption activities, rather than through the harsh, direct application of strong acids.
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Fertilizer Ammonium Sulfate

Fertilizer Ammonium Sulfate

Rongda Fertilizer Ammonium Sulfate is a high-quality agricultural fertilizer raw material refined through meticulous purification. Thanks to its industry-leading purity, it has gained widespread recognition from farmers and fertilizer manufacturers worldwide. As a professional manufacturer from China, Rongda, with its advanced production processes and strict quality control, provides stable and reliable products to large-scale farms and precision farming operations, helping to improve fertilizer utilization and reduce production costs. It is a preferred partner in the field of agricultural fertilization.
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Ammonium Sulfate For Cotton

Ammonium Sulfate For Cotton

As cotton farmers know, high yield is only the first step, and getting a good price is the key to real profitability. Rongda Ammonium Sulfate For Cotton is specially developed to improve cotton quality. It protects the growth of cotton fibers from the source of planting, helping cotton farmers stand out in the market competition.
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Ammonium Sulfate For Rice

Ammonium Sulfate For Rice

Rice cultivation pursues stable and high yields, and fertilizer selection is crucial. The right fertilizer can reduce agricultural input and improve planting benefits. Rongda Ammonium Sulfate For Rice is a special fertilizer developed exclusively for rice growth, which is highly adaptable to the flooded environment of rice fields. It effectively solves the problems of nutrient loss and low utilization rate in rice planting.
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Fertilizer For Sulfur-Loving Crops

Fertilizer For Sulfur-Loving Crops

As a professional fertilizer tailored for sulfur-loving crops, Rongda Fertilizer For Sulfur-Loving Crops is developed based on the unique nutritional absorption characteristics of crops with high sulfur demand. It provides targeted sulfur nutrition to accurately meet the growth needs of such crops.
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Granular Ammonium Sulfate

Granular Ammonium Sulfate

Rongda Granular Ammonium Sulfate is a practical agricultural fertilizer produced by fine granulation technology. It features uniform particle size, compact structure, excellent fluidity, and no excessive dust during transportation and application, effectively reducing material waste.
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White Crystalline Ammonium Sulfate

White Crystalline Ammonium Sulfate

RONGDA White Crystalline Ammonium Sulfate is a high-end agricultural grade product with a purity of over 99.5%, featuring uniform white crystal appearance, excellent dissolution performance and multi-scenario adaptability. As a professional manufacturer from China, the product has passed ISO9001, EU REACH and other international authoritative certifications, as well as 238 heavy metal and pesticide residue tests by SGS.
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Ammonium Chloride Fertilizer

Ammonium Chloride Fertilizer

RONGDA Ammonium Chloride Fertilizer is a high-quality nitrogen fertilizer with stable composition and remarkable planting value, which is widely favored by farmers. Its core component has a stable nitrogen content of about 25%, providing sufficient and cost-effective nitrogen nutrition support for crop growth, and is especially suitable for large-scale planting with cost control needs. The product contains ammonium nitrogen with low mobility in soil, which can release nutrients stably and continuously, avoiding waste.
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Agricultural Ammonium Chloride

Agricultural Ammonium Chloride

RONGDA Agricultural Ammonium Chloride is a high-quality nitrogen fertilizer widely used in agricultural production. Adhering to strict agricultural-related standards throughout the production process, the product features stable and controllable chloride ion content, ensuring safe application. As a reliable product from a professional manufacturer in China, it not only meets the nitrogen demand of various chlorine-tolerant crops to improve yield and quality but also serves as an ideal basic nitrogen source for compound fertilizer enterprises, helping to enhance market competitiveness while controlling production costs.
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Nitrogen Fertilizer For Rice

Nitrogen Fertilizer For Rice

RONGDA Nitrogen Fertilizer For Rice is a high-performance nitrogen fertilizer specially developed for the growth characteristics of rice and the specific anaerobic environment of paddy fields. It is designed to solve the industry pain points of low nitrogen utilization rate and easy nutrient loss in rice planting. The product takes ammonium nitrogen as the core effective component, which can form a stable combination with soil colloids, significantly reduce nitrogen loss caused by water leaching and denitrification, and ensure continuous and stable nutrient supply for rice from seedling stage to heading stage.
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Ammonium Chloride For Paddy Fields

Ammonium Chloride For Paddy Fields

Paddy field planting relies heavily on water, but the long-term flooded anaerobic environment brings great difficulties to fertilization. Ordinary fertilizers are prone to nitrogen volatilization or transformation loss in this environment, resulting in ineffective investment costs. RONGDA Ammonium Chloride For Paddy Fields is specially developed for the flooded environment of paddy fields. Centering on the characteristics of flooded soil, it can stably maintain nitrogen availability in anaerobic conditions, effectively solving the pain points of paddy field fertilization.
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For Base And Top Dressing

For Base And Top Dressing

RONGDA Dual-Purpose Fertilizer for Base and Top Dressing is a high-performance agricultural fertilizer designed to simplify farming management and enhance crop yields. Its core advantage lies in flexible application scenarios, serving as both base fertilizer and topdressing to meet the nutritional needs of crops throughout different growth stages. Developed by a professional manufacturer in China, this product not only reduces farmers' fertilizer purchase costs and inventory management burden but also features adjustable application methods adapting to actual crop growth and weather conditions.
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Crystalled Ammonium Chloride

Crystalled Ammonium Chloride

RONGDA Crystalled Ammonium Chloride is a high-quality raw material for agricultural and industrial fertilizer applications, processed through a refined crystallization process. With strictly controlled production procedures, the product features excellent purity that meets industry high standards, along with rapid solubility, wide applicability and convenient use.
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Fertilizer Containing 25% Nitrogen

Fertilizer Containing 25% Nitrogen

RONGDA Fertilizer Containing 25% Nitrogen is a high-efficiency and cost-effective nitrogen supplement product developed by RONGDA, a professional manufacturer based in China. Focusing on efficient nitrogen supplementation and comprehensive cost reduction, this product features a solid 25% available nitrogen concentration, which is scientifically and precisely proportioned. It is applicable to various chlorine-tolerant crops and can also be used as a raw material for compound fertilizer production.
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Calcium Ammonium Nitrate Fertilizer

Calcium Ammonium Nitrate Fertilizer

RONGDA Calcium Ammonium Nitrate Fertilizer is a safe and efficient multi-nutrient fertilizer developed for modern agricultural needs. It integrates available nitrate nitrogen, long-acting ammonium nitrogen and water-soluble calcium, providing comprehensive and staged nutrient support for crop growth. The product has been technically improved to eliminate flammable and explosive risks, ensuring safety in the whole process of storage, transportation and use.
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Lime Ammonium Nitrate

Lime Ammonium Nitrate

RONGDA Lime Ammonium Nitrate is a high-quality agricultural fertilizer developed on the basis of traditional ammonium nitrate improvement. By scientifically proportioning lime components, it realizes dual upgrades in practicality and safety. The product is designed to solve the potential safety hazards of traditional ammonium nitrate, while taking into account crop nutritional needs and soil conservation. It can provide nitrogen and calcium nutrients for crops, regulate soil acidity, and is widely applicable to various field crops, vegetable crops and fruit trees.
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Safe Nitrogen Fertilizer

Safe Nitrogen Fertilizer

RONGDA Safe Nitrogen Fertilizer is a revolutionary unit fertilizer dedicated to providing high-quality nitrogen nutrition for plants while prioritizing safety. Breaking the safety limitations of traditional nitrogen fertilizers, it is excluded from the category of hazardous chemicals, eliminating potential risks from the source. With outstanding performance in storage, transportation, and application, it is suitable for various planting scenarios ranging from home gardening to large-scale planting bases.
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Calcium-Containing Nitrogen Fertilizer

Calcium-Containing Nitrogen Fertilizer

RONGDA Calcium-Containing Nitrogen Fertilizer is a high-quality agricultural input product that focuses on meeting the nutrient supplement needs of fruits and vegetables during growth. It achieves scientific combination of nitrogen and calcium elements, providing comprehensive and targeted nutrition for crop growth. The product can effectively reduce the occurrence of crop physiological diseases, improve fruit quality and commodity competitiveness, and help growers increase income.
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Neutral Fertilizer

Neutral Fertilizer

In the context of the agricultural industry's pursuit of high efficiency and ecological sustainability, RONGDA Neutral Fertilizer has emerged as a preferred choice for farmers and horticultural enthusiasts worldwide. Characterized by a pH value close to neutral, this fertilizer does not disrupt the soil's acid-base balance, effectively addressing the soil acidification or alkalization issues caused by long-term chemical fertilizer use. It maintains a stable soil microenvironment, promotes the reproduction of beneficial microorganisms, and continuously improves soil fertility.
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Fast-Acting Nitrogen Fertilizer

Fast-Acting Nitrogen Fertilizer

RONGDA Fast-Acting Nitrogen Fertilizer is a high-performance agricultural fertilizer specially developed for targeted nitrogen supplementation in planting scenarios. Its core component is highly active nitrate nitrogen, which enables crops to directly absorb nutrients without complex soil transformation, achieving rapid nutrient supply. The product can effectively alleviate chlorosis, growth stagnation and other problems caused by nitrogen deficiency, and is applicable to multiple soil conditions and various crop growth stages. It plays an important role in promoting healthy crop growth and stabilizing yield.
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Calcium Fertilizer For Fruit Trees

Calcium Fertilizer For Fruit Trees

RONGDA Calcium Fertilizer for Fruit Trees is a professional fertilizer developed specifically for the calcium absorption law of fruit trees. It is designed to solve the common calcium deficiency problem of fruit trees, effectively preventing a series of fruit quality defects caused by calcium deficiency. The product can promote fruits to grow sturdily from the inside out, making them hard, plump, bright and attractive. Suitable for a variety of fruit trees, it has reliable calcium efficiency based on scientific research and development logic.
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Calcium And Nitrogen Fertilizer For Vegetables

Calcium And Nitrogen Fertilizer For Vegetables

RONGDA Calcium And Nitrogen Fertilizer For Vegetables is a scientifically formulated fertilizer designed to solve the pain points of vegetable farmers such as low yield, ordinary appearance and low market price. By reasonably combining available nitrogen and calcium elements, it provides comprehensive and targeted nutrients for vegetable growth, effectively promoting yield improvement, optimizing commodity quality, and enhancing market competitiveness.
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Acid Soil Improvement

Acid Soil Improvement

Soil quality is a core factor affecting crop growth and yield, and soil acidification has become a prominent problem restricting agricultural production in many regions. RONGDA Acid Soil Improvement Fertilizer is a specialized product developed to address soil acidification. Rich in high-quality calcium carbonate, it can gently and continuously neutralize soil acid substances, adjust pH to the range suitable for crop growth, and reduce the harm of harmful ions to crop roots.
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Calcium Ammonium Nitrate For Lawns

Calcium Ammonium Nitrate For Lawns

RONGDA Calcium Ammonium Nitrate For Lawns is a professional lawn-specific fertilizer meticulously developed to solve common lawn maintenance problems such as slow greening, dull color, easy baldness after trampling, and high susceptibility to diseases. Adopting nitrate nitrogen and calcium-magnesium dual-effect synergy technology, the product can make the lawn turn green quickly within 3-7 days, keep the color bright for a long time, and significantly improve trampling resistance and disease resistance.
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Fertilizer For Greenhouse Cultivation

Fertilizer For Greenhouse Cultivation

With the booming development of modern greenhouse cultivation, the demand for targeted and high-quality fertilizers is increasingly prominent. RONGDA Fertilizer For Greenhouse Cultivation is specially developed to address the unique fertilizer needs of closed greenhouse environments. As a professional manufacturer based in China, we adopt a chlorine-free and low-salt index formula to avoid soil salinization and maintain soil health.
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Granular Calcium Ammonium Nitrate

Granular Calcium Ammonium Nitrate

RONGDA Granular Calcium Ammonium Nitrate is a granular specialty fertilizer with calcium ammonium nitrate as its core component, manufactured using a special process. It is specifically developed to address the challenges of fertilizer efficiency and uniformity in large-scale agricultural production. The product boasts advantages such as moderate hardness and uniform particle size, making it suitable for various application methods, including mechanized and aerial fertilization. It can be widely used in large-scale crop cultivation, grassland and pasture maintenance, and forestry.
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Gray Granular Fertilizer

Gray Granular Fertilizer

In fertilizer management and blending operations, confusion among fertilizers with similar appearances (such as common white urea and diammonium phosphate) often occurs during storage, transportation, and on-site BB fertilizer blending, bringing unnecessary risks to agricultural production. RONGDA Gray Granular Fertilizer is a practical solution developed for this pain point. Its unique gray appearance, derived from natural calcium sources rather than artificial pigments, serves as a visual identification mark, enabling quick distinction from other fertilizers.
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Imported Calcium Ammonium Nitrate

Imported Calcium Ammonium Nitrate

RONGDA Imported Calcium Ammonium Nitrate originates from Europe, adopting top local production technology and inheriting a century of European agricultural production experience. As a high-quality fertilizer recognized by global growers, it features strict production control, stable performance, wide application in high-end agricultural fields, and complete traceability. The product can provide continuous and balanced nutrient supply for crops, meet the needs of green and high-end agricultural production, and is easy to store and use.
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Our Advantages

Backed by over 20 years of industry experience, advanced automated production lines, and strong R&D cooperation, we deliver stable quality, customized formulas, and reliable OEM services. Strict quality control ensures consistent performance from raw materials to finished products.

Industry Experience

Industry Experience

Tianjin Rongda Fertilizer Co., Ltd., was established in 2011. It is a modern production and import/export enterprise specializing in the research, development, production, sales, and service of environmentally friendly and eco-friendly formula fertilizers.
Production Capacity

Production Capacity

The company currently has two branch factories: a 200,000-ton/year ecological blended fertilizer production base in Jinghai, Tianjin; and a 150,000-ton/year ecological blended fertilizer, 100,000-ton/year compound fertilizer, and 100,000-ton/year compound fertilizer production base in Shandong.
Advanced Equipment

Advanced Equipment

The company invested over 4 million yuan to upgrade its extrusion pellet production line, adding integrated shaping and cooling equipment, multi-stage screening equipment, and fully automated gas-fired drying equipment; and invested over 6 million yuan to upgrade its compound fertilizer production line, transforming manual feeding into fully automated computer-controlled metering and feeding, and upgrading the original "one drying and one cooling" process to "two drying and two cooling" processes.
Quality Service

High-quality Service

Before sales, we measure soil conditions and specify fertilization plans; during sales, we guide customers on the correct use of fertilizers and provide fertilization advice; we regularly follow up with farmers to monitor crop growth; after sales, we help farmers measure yields and actively contact grain traders to assist farmers.
About Us

About UsAbout Us

Tianjin Rongda Import and Export Co.,Ltd.

Tianjin Rongda Fertilizer Co., Ltd., was established in 2011. It is a modern production and import/export enterprise specializing in the research, development, production, sales, and service of environmentally friendly and eco-friendly formula fertilizers.
Main products include Ammonium Sulfate, Ammonium Chloride, Calcium Ammonium Nitrate, controlled-release blended fertilizers, microbial agents, and polyurethane-coated urea.
The company prioritizes safe, environmentally friendly, and energy-saving production. Adhering to the principles of "innovation and green" development, it has collaborated with Shandong Agricultural University and provincial fertilizer research institutes to develop bio-chelated fertilizers and amino acid slow-release fertilizers. These new products have been officially launched on the market, contributing to the development of ecological agriculture.
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  • Established in 2011
    15 +
    years
  • Annual Sales Volume
    1 +
    Million tons
  • Worldwide Sales
    50 +
    Countries
  • Development Partners
    60 +
    Patents

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Get the latest updates on product innovations, production upgrades, exhibitions, and fertilizer industry trends. Learn how our continuous investment in green technology and ecological agriculture solutions helps partners grow in global markets.

Ammonium Sulfate Fertilizer: Efficacy and Functions

Ammonium Sulfate Fertilizer: Efficacy and Functions

Ammonium sulfate, with the chemical formula (NH₄)₂SO₄, is a high-efficiency quick-acting fertilizer containing about 21% nitrogen and 24% sulfur, serving as a dual-nutrient fertilizer for both nitrogen and sulfur supplementation. It is highly soluble in water, easy for crops to absorb directly, and shows obvious effects even at low temperatures, making it widely applied in agricultural production.

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Is there a difference between

Is there a difference between "microbial fertilizers" and "microbial inoculants"?

Microbial Fertilizers: Products containing specific live microorganisms, applied in agricultural production. Through the life activities of these microorganisms, they increase the supply of plant nutrients or promote plant growth, increase yield, improve the quality of agricultural products, and improve the agricultural ecological environment. Microbial fertilizers include microbial inoculants (agricultural microbial agents), compound microbial fertilizers, and bio-organic fertilizers.

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