Ammonium Sulfate (21-24-0) - Comprehensive Product Introduction

Ammonium Sulfate, with the nutrient grade 21-24-0 and chemical formula (NH4)2SO4, is a classic high-efficiency inorganic compound fertilizer integrating nitrogen (N) and sulfur (S). It is a white, odorless solid available in crystalline powder, regular granular and spherical granular forms, featuring high water solubility, fast nutrient release and stable chemical properties. As a dual-nutrient fertilizer with 21% ammonium nitrogen and 24% available sulfur, it is widely used in global agricultural production for various field crops, fruits, vegetables and cash crops, and also has minor applications in industry and animal husbandry. Below is a detailed introduction from basic parameters, product forms, core functions, application guidelines, advantages and storage notes.

Core Product Basic Parameters

Core Product Functions & Nutritional Value

1. Nitrogen supply (21% ammonium N): The ammonium nitrogen is easily absorbed by crop roots, with fast fertilizer effect and no volatilization loss under proper application; it directly participates in chlorophyll and amino acid synthesis, promoting vigorous vegetative growth of crops, preventing nitrogen deficiency yellowing and improving photosynthetic efficiency.
2. Sulfur supply (24% available S): Sulfur is a core element for crop protein, enzyme and vitamin synthesis, which can improve crop quality (e.g., increasing grain protein content, improving fruit sugar content and flavor), and enhance crop stress resistance (drought, disease and pest resistance).
3. Soil adaptation: Its weakly acidic property can moderately improve alkaline and calcareous soils, reduce soil compaction, and optimize soil microbial activity and nutrient availability, which is more suitable for alkaline soil areas.

4. Nutrient synergy: The N-S dual nutrition forms a complementary effect, which can promote the absorption of other nutrients (e.g., phosphorus, potassium) by crops, and improve the overall fertilizer utilization rate.

Agricultural Application Guidelines

Suitable Crops & Soils

• Suitable crops: Universal for all field crops (rice, wheat, corn, cotton, soybeans), fruits and vegetables (apple, citrus, tomato, cucumber) and cash crops (tobacco, tea, cotton); especially effective for sulfur-loving crops (rapeseed, garlic, onion).
• Suitable soils: Optimal for alkaline, calcareous and neutral soils; also applicable for slightly acidic soils (avoid long-term single application in strongly acidic soils to prevent soil acidification aggravation).