2007—2009年在醴陵市白兔潭、大障、泗汾等3个乡镇实施双季超级杂交稻“种三产四”丰产工程示范,3a共示范种植超级杂交稻3018.4hm2,比当地前5a水稻平均单产增产33.3%～47.8%,实现了“种三产四”丰产工程的目标。阐述了示范基地采用的主要组织措施、技术措施以及存在的问题,并提出了建议。 From 2007 to 2009, two-season super hybrid rice “Three-year-four” high-yielding project demonstration was implemented in three townships including White Rabbit Lake, Dacan and Sifen in Liling City. A total of 3018.4hm2 of super hybrid rice was planted in total in 3a, The average yields of the first five years of rice increased by 33.3% ~ 47.8%, achieving the goal of “three production and four” high yielding projects. The main organizational measures, technical measures and problems existing in demonstration bases are expounded and suggestions are put forward.