绒毛原产北美洲 ,1911年引种到济南 ,1954年传到天津 ,现已分布到整个黄河、长江中、下游流域 ,北到辽宁 ,南到浙江 ,西到甘肃 ,在天津及山东滨州被选为市树 ,大量栽培。天津由于在育苗过程中间苗 ,现在雌株偏少。本文对其生物学特性及耐盐性、变异类型及优树选择、无性繁殖技术及造林、营林技术、虫害防治等方面的研究现状作了较全面的综述 ,并提出今后应着重研究的几个问题 The villus was originally native to North America. It was introduced to Jinan in 1911 and spread to Tianjin in 1954. It has been distributed throughout the Yellow River and the middle and lower reaches of the Yangtze River. It reaches Liaoning in the north, Zhejiang in the south, Gansu in the south and Binzhou in Tianjin and Shandong Selected as the city tree, a large number of cultivation. Tianjin seedlings in the middle of the nursery process, and now the female plant less than normal. In this paper, the current research status of its biological characteristics and salt tolerance, types of mutation and tree selection, asexual reproduction techniques and afforestation, silviculture techniques, pest control and other aspects of the study made a more comprehensive overview and put forward the future should focus on the study of several A question