The experiments were conducted from1997～1999 to study anti-frost agent Zhuangzaofeng (ZZF) for releasing the frost damage inYuncheng, southern Shanxi province. ZZF wasselected and mixed with nutrients, hormones,frostbite-proof agent. Systemic spraying withZZF during cotton growing stages showed thatplant height tended to decrease by 9. 89％～22.58％, the internode lengths of main stemsand sympodiums were shorter than that of thecontrol; while the plant type was compact, veg-etative growth was harmonized with reproduc-rntion, inner boll retention rate on sympodium washigher, boll numbers/plant and boll sizes in-creased, boll opening were 2～3 days early, lintyield increased by 5.4％0～17.93％ than that ofthe control. ZZF did not affected cotton fibercharacters obviously.%经过3年田间试验与示范，研制出棉花促早避霜剂一壮早丰(配方编号：97BS8)。棉花系统喷施壮早丰后，棉株株高降低9．89％～22．58％，主茎节间和果枝节间缩短，棉花株型紧凑，协调了营养生长与生殖生长关系，内围铃增多，单株铃数和铃重增加，生育进程加快，吐絮期提早2～4d，皮棉比对照增产5．4％～17．93％，对棉花纤维品质无不良影响。
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