Magnesium Sulfate Fertilizer for Agriculture

RONGDA Magnesium Sulfate is a professional agricultural-grade fertilizer product series, delivering both magnesium and sulfur — two essential secondary nutrients critical for crop photosynthesis, enzyme activation, and protein synthesis. As a trusted magnesium sulfate fertilizer manufacturer in China, RONGDA produces a complete range of specifications to meet diverse fertilization needs, from soil application to fertigation and foliar spray. RONGDA ensures consistent quality and stable supply for global agricultural markets.

Core Product Advantages 

1. Rapid Absorption and High Efficiency

Magnesium is the central atom of the chlorophyll molecule, directly essential for photosynthesis and energy transfer within plant cells. RONGDA magnesium sulfate products are highly water-soluble, enabling crops to absorb magnesium and sulfur nutrients immediately after application — without a slow conversion process in soil. This fast-acting property makes magnesium sulfate fertilizer especially effective for quickly correcting magnesium deficiency symptoms such as interveinal chlorosis, promoting greener foliage and stronger plant vigor within days of application.

2. Sulfur Supply and Crop Quality Enhancement

In addition to correcting magnesium deficiency, RONGDA magnesium sulfate provides sulfur in sulfate form (SO₄²⁻), which is crucial for the synthesis of essential amino acids (cysteine, methionine) and plant proteins. Sulfur also plays a key role in oil and flavor compound formation, making this product particularly beneficial for oil crops, garlic, onion, tobacco, and tea. The synergistic effect of magnesium and sulfur improves nitrogen use efficiency and contributes to measurable improvements in fruit color, sugar content, and storage quality.

3. Multiple Forms for Diverse Application Needs

RONGDA magnesium sulfate fertilizer is available in various forms including powder, granule, and crystal, with multiple particle size options to suit different fertilization methods. Whether for soil broadcasting, compound fertilizer blending, drip irrigation, or foliar spray, customers can select the most suitable form based on their specific crop requirements and equipment compatibility. This flexibility ensures optimal nutrient delivery efficiency across all application scenarios.

Storage and Application Characteristics

RONGDA magnesium sulfate products exhibit good stability when stored in dry, well-ventilated conditions. Products should be kept in sealed packaging away from direct moisture and sunlight to maintain quality. All products comply with the national standard GB/T 26568-2011 for agricultural-grade magnesium sulfate, with raw materials sourced from high-quality mineral deposits, ensuring batch-to-batch consistency.

For application, these products support soil broadcasting, fertigation (drip and sprinkler), foliar spray, and compound fertilizer blending. Recommended foliar spray dosage is 5–10 g per liter of water, applied 2–3 times at 10–15 day intervals. Soil application rates typically range from 25–50 kg per hectare, depending on crop type and soil magnesium levels.

Applicable Scopes

RONGDA magnesium sulfate fertilizer is widely used across field crops, horticulture, greenhouse agriculture, and specialty crops. It is particularly recommended for magnesium-deficient soils (sandy soils, acidic red soils, intensively farmed lands), sulfur-loving crops (rapeseed, garlic, tobacco, legumes), and high-value fruits and vegetables (tomatoes, citrus, grapes, strawberries, potatoes). The product series also serves as a key raw material for compound fertilizer and water-soluble fertilizer manufacturers worldwide.