黄腐酸是由分子量不同的化合物组成的一种混合物。其基本结构是以芳核为骨架的带有酚羟基,醇羟基、醌基的多羧酸。由于黄腐酸含有较多的酸性基团,能与多种金属形成络合物。近几年来,在农业上利用黄腐酸与铁的络合作用,研制出新型的铁肥作叶面喷洒和肥料,对树木缺铁失绿症(黄叶病)的防治比硫酸亚铁等铁肥有较好的效果。Bell等发现玉米的突变体当供给Fe~(3+),助长产生黄叶病条纹的条件,而供给Fe~(2+)作为铁源时,则植物保持正常的绿色,即植物的黄叶病是由于植物组织中 Fulvic acid is a mixture of compounds of different molecular weights. Its basic structure is based on the aromatic nucleus with a phenolic hydroxyl, alcoholic hydroxyl, quinone-based polycarboxylic acid. Because fulvic acid contains more acidic groups, it can form complexes with many metals. In recent years, the use of fulvic acid and iron complex in agriculture, developed a new type of iron fertilizer for foliar spray and fertilizers, the tree of iron deficiency chlorosis (yellow leaf disease) prevention and treatment than ferrous sulfate Iron fertilizer has a good effect. Bell et al. Found that mutants of maize maintain the normal green color when Fe (3+) is supplied and conditions favoring the production of stripe of yellow leaf, while feeding Fe 2+ as an iron source, that is, yellow leaves The disease is due to plant tissue