腐植酸是高分子物质,具有多种功能基团,表现出物理、化学、生理活性和作用。山东农大肥业科技有限公司研发成功“农大牌”系列腐植酸缓释肥,属于腐植酸类复混肥料,其品种的配方(N∶P2O5∶K2O)有5种主要产品:18-12-5(总养分≥45%)、14-20-6(总养分≥40%)、18-16-6(总养分≥40%,小麦专用肥)、22-0-8(总养分≥30%)、15-9-6(总养分≥30%),均含有腐植酸≥8%。以 Humic acid is a polymer material, with a variety of functional groups, showing physical, chemical, physiological activity and role. Shandong Nongda Fertilizer Technology Co., Ltd. successfully developed “Nongda brand” series of humic acid slow-release fertilizer, is a humic acid compound fertilizer, the varieties of formula (N: P2O5: K2O) has five main products: 18-12 -5 (total nutrient≥45%), 14-20-6 (total nutrient≥40%), 18-16-6 (total nutrient≥40%, wheat special fertilizer), 22-0-8 (total nutrient≥30 %), 15-9-6 (total nutrients ≥ 30%), all containing humic acid ≥ 8%. To