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多效唑是一种植物生长延缓剂,具有控高防倒,增枝促蘖,防病控旺,控上促下等作用。主要通过抑制植物体内赤霉素的合成而起作用。晚稻育秧使用多效唑,能矮化秧苗,延长秧苗生长期,促蘖增蘖,增穗增粒增产。据试验和大田观察,喷施多效唑的与喷清水的对照比较,秧苗矮三分之一,新根数和分蘖数各增加30%,秧龄拉长10天左右,有效穗增加1.2~1.6万穗,每亩增产稻谷28~40公斤。但如果使用不
Paclobutrazol is a plant growth retardants, with the control of high down, increased branches to promote tillering, disease prevention and control Wang, control on the role of promoting hypoglycemic. Mainly through the inhibition of plant gibberellin synthesis and play a role. Rice seedling use of paclobutrazol late rice can dwarf the seedlings, to extend the seedling growth stage, tillering, tillering, grain yield increase by the ear. According to the experiment and field observation, compared with sprayed water control, the spraying of paclobutrazol was a short one-third of the seedlings, the number of new roots and tillers were increased by 30% each, the seedling age was extended by about 10 days, and the effective panicles increased by 1.2-1.6 million spikes , Increase rice per acre 28 to 40 kg. But if not use