山东省恒台县农民刘庆强与旱藕结缘始于1999年。那年春天,曾干过农村生产队长、当过建筑包工队长的刘庆强通过参加农广校举办的“绿色证书”培训班学习后,产生了一个大胆的设想:在旱地上挖沟建池,注入自来水,将原本在池塘里生产的莲藕移到旱地上。他认为,此举既可以防止莲藕产品受污水污染, Liu Qingqiang farmers in Hengtai County, Shandong Province, and the lotus root knot began in 1999. That spring, Liu Qingqiang, who had been the captain of a rural production team and the captain of a construction contractor, had a bold idea after he attended the “Green Certificate” training class organized by the Guangxi Agricultural University: digging ditches and building pools in the dry land, Tap water, the original lotus root production in the pond to the dry land. In his opinion, this measure can prevent the lotus root products from being polluted by the sewage,