多效唑是七十年代末研制成功并开始在农业上应用的新型植物生长调节剂,代号为MET。它具有抑制植物茎的伸长,促进分蘖,增加叶绿素,返青快,防止倒伏,增穗增产的作用。 1987年我们在双季晚稻上进行了多效唑的应用试验,收到了良好的效果,将结果报道如下。选用杂交稻汕优63、威优64、汕A/5875三个品种进行了对比试验,喷施多效唑与 Paclobutrazol is a new plant growth regulator successfully developed in the late seventies and started to be applied in agriculture. It is called MET. It has the effect of inhibiting plant stem elongation, promoting tillering, increasing chlorophyll, returning green fast, preventing lodging and increasing spike yield. In 1987, we conducted a trial on the application of paclobutrazol in the double season late rice and received good results. The results are reported as follows. Three hybrid rice varieties, Shanyou 63, Weiyou 64, and Shantou A / 5875, were selected for comparative experiments.