黄花菜是甘肃陇东的地方特产,但由于气候干旱,幼蕾脱落和枯死达40—60％。这是生产上亟待解决的问题。关于用植物激素使黄花菜增产的实例,在国内报道甚少。但用于其它蔬菜和果树上却很普遍。尤其对于控制落花落果,效果显著。文献表明,6—苄氨基嘌呤(BA)可控制华盛顿脐橙生理落果;用10—20ppm的2,4— Day lily is a local specialty of Gansu Longdong, but because of the arid climate, young buds shed and die up to 40-60%. This is a problem to be solved urgently in production. On the use of plant hormones to increase the yield of lily examples rarely reported in the country. But it is common for other vegetables and fruit trees. Especially for the control of flowers, the effect is significant. The literature shows that 6-benzylaminopurine (BA) controls the physiological drop of Washington navel orange; with 10-20 ppm of 2,4-