红丹牌碳酸氢铵（50公斤）

Hongdan Brand Ammonium Bicarbonate (Tan'an) is a cost-effective quick-acting nitrogen fertilizer packaged in 50kg bags for large-scale farming. As the only alkaline nitrogen fertilizer, it directly supplies ammonium nitrogen to crops while helping neutralize soil acidity—ideal for fields affected by long-term fertilization. Its rapid action alleviates nitrogen deficiency symptoms like yellowing leaves and stunted growth without leaving harmful residues. This guide covers its core characteristics as a mild alkaline fertilizer, main applications for crops like rice and vegetables, and crucial usage precautions. Proper deep application with soil coverage prevents nitrogen loss, while avoiding mixture with alkaline substances maintains effectiveness. The article also introduces FDD-Global, an agricultural input platform connecting reliable suppliers with bulk buyers to optimize supply chains and reduce costs for manufacturers, distributors, and farmers worldwide.