“９２０”施得巧蔬菜增产效果好“９２０”即赤霉素，是种具有高度生理活性的植物激素。生产经验表明，在蔬菜上施用“９２０”，有显著增产效果。但必须注意施用的合理时期、用量、浓度、剂量以及用药部位、方法，做到“巧施”。西红柿在全田开花率达６５％～７５％时，... “920” fertilize vegetables yield good effect “920” is gibberellin, is a kind of plant hormone with a high degree of physiological activity. Production experience shows that the application of “920” on vegetables has a significant yield-increasing effect. But we must pay attention to the application of a reasonable period of time, dosage, concentration, dosage and medication sites, methods, so that “clever application.” Tomato flowering in the whole field of 65% to 75%, ...