植物激素为有机物质,当以低浓度施于植物根部时,能促进植物沿茎轴生长。就其实用性来说,它不受植物自身固有的生长刺激物质的影响。现在应用的植物激素,是在实验室合成的。已经证明,它们在农业生产上有着重大的意义,受到了许多研究人员的关注。用酸性激素吲哚乙酸(IAA)做擦剂,可促使许多植物的扦条生根。应用另 Plant hormones, which are organic substances, promote plant growth along the stem axis when applied to plant roots at low concentrations. For its practicality, it is not affected by the inherent growth-stimulating substances of the plant itself. The plant hormones now in use are synthesized in the laboratory. It has been proved that they have great significance in agricultural production and have attracted the attention of many researchers. With the acid hormone indole acetic acid (IAA) as a liniment, can promote the rootstocks of many plants. Apply another