一九七六年宝相大队用保定化工四厂提供的无碘增产灵(苯氧乙酸)对水稻苗期进行了喷洒试验,取得了明显效果:对水稻弱苗用20ppm浓度喷洒,48小时后,叶片由黄绿色变为黑绿色,96小时后加速生长,10天后,株高赶上或略高于早发壮苗,直到成熟,无其他异常表现;同样浓度在移栽期喷洒,移栽时秧苗即 In 1976, the Brigade Brigade sprayed rice seedlings with non-iodine Zincben (phenoxy acetic acid) supplied by Baoding Chemical No. 4 Plant and achieved remarkable results. After spraying weak fertilizers with 20 ppm, 48 hours later , The leaves from yellow-green to black-green, accelerated growth after 96 hours, 10 days later, the plant height to catch up or slightly higher than the early seedlings until mature, no other abnormalities; the same concentration in the transplanting spraying, transplanting When the seedlings that