“7841”又名“PGR—1”,化学名称3—(2—吡啶基)—丙醇,是一种新型植物生长调节剂。1978年南开大学元素所研制成功,并做了六、七年的大田药效试验,获得了较好的经济效益。“7841”属控制营养生长,促进生殖生长的一种新型化学激素。主要作用是抑制植物株高,植株变矮粗,根系发达,抗倒状,花数增加,叶面积指数加大,促进光合产物的积累,果实千粒重增加,提高产品品质,增加产量。主要用于花生、大豆、 “7841” aka “PGR-1”, a chemical name of 3- (2-pyridyl) -propanol, is a new plant growth regulator. Nankai University in 1978 elements of the successful development, and made six or seven years of field efficacy trials, access to better economic benefits. “7841” is a new chemical hormone that controls vegetative growth and promotes reproductive growth. The main role is to inhibit the plant height, plant becomes dwarfing, developed root system, upside down, the number of flowers increased, the leaf area index increased, and promote the accumulation of photosynthetic products, the increase of 1000-grain weight, improve product quality and increase production. Mainly used for peanuts, soybeans,