三十烷醇（TA）乳粉是一种广谱性的植物生长调节剂，1997年被农业部列入全国农牧渔业丰收计划项目后，五六年来在福建省水稻上试验、示范、推广工作取得显著进展。在水稻幼穗分化2—3期和孕穗期分别叶面喷施1～2 mg/L TA一次，能促进稻株生长发育，提高碳、氮代谢水平，增加有效穗、穗粒数、穗实粒数，提高结实率、千粒重和晒干率等。处理比对照平均增产干谷0.964 t/hm²，增产率为15.4 %，并能改善品质。据多年多点多次的验收、考种和测产的数据表明，其增产效果稳定，重现性好。不仅产出/投入比高，而且具有无毒害、无污染、成本低、效益高和使用方法简便等优点，对增加粮食产量和发展无公害农业有重要意义。

Triacontanol (TA) emulsive powder is a kind of widespread plant growth regulator. Since 1997, the work of experiment, demonstration and extension activities on rice in Fujian Province has got progress. The leaves are sprayed with 1 ～2 mg/L TA respectively for one time during the differentiation of juvenile ear and incubation period. The results show that TA can improve the growth of rice, increase the carbon and nitrogen metabolism, raise the effective ear, ear quantity and setting percentage. It also can increase thousand-grain weight and dry weight, and so on. Treating with TA can increase the dry weight of grain 0.964 t/hm² equally compared with the control. And the rate of increased yield is 15.4% . Besides, it can improve the quality of rice. According to the data of checking seed and measuring yield in several states for many times, it indicates that the effect of increase in yield remains stable. Not only input-output ratio is high, but also it has many advantages, such as non-poisonous, non-pollution, low cost and high-return, and it is easy to be operated.