A kind of potassium fertilizer based lignin was made from modified lignin and potassium chloride, leaching experiment and pot experiment were conducted to test the effect of modified lignin on slow-releasing potassium fertilizer and the Bio-utilization.

• 摘要利用木质素改性产物作为肥料添加剂，与氯化钾复混制成木质素钾肥，通过土柱淋溶与盆栽试验，验证木质素对钾肥的缓释作用与作物对钾肥利用情况。