The development of cultivation technology for mechanically dense transplanting of large single seedlings of hybrid rice had solved the production problems of traditionally machine-transplanted hybrid rice,including high seeding rate,short seedling age,poor seedling quality,and unmatched growth duration for double-season varieties.In this paper,we summarized the extension situation of cultivation technology for mechanically dense transplanting of large single seedlings of hybrid rice in Hengyang from 2017 to 2021.In particular,we focused on the extension mode and benefits of cultivation technol...