四川桤木(Alnus cremastogyne)原产四川邛崃山脉,栽培历史已达千年之久,是一种有着广阔前景的材用与土壤改良的多功能树种。近年来,引种栽培的地区已扩展到江苏、浙江、安徽、江西等长江中下游地区。限于以往对该树种利用多而研究少,系统和确切的资料不够充分等原因,1987年赴四川进行优树选择时,将采种问题列入专门的研究。 Sichuan Alnus cremastogyne is a native of the Sichuan Juyi Mountains. It has been cultivated for thousands of years and is a versatile tree species with broad prospects for soil improvement. In recent years, the introduction of cultivation areas have been extended to Jiangsu, Zhejiang, Anhui, Jiangxi and other regions of the Yangtze River. Due to the limited use of the species in the past and less research, the system and the exact lack of sufficient information and other reasons, to go to Sichuan in 1987 to choose the best tree, the issue of collecting seeds into a special study.