根据近十几年来黑龙江省水稻栽培发展情况，总结出水稻栽培密度演变“三模式”的概念。依据黑龙江垦区水稻生产以盘育机插为主的实际，研究寒地气候条件下盘育苗机械超稀植水稻生长发育特点的结果，提出了以“前稳、中促、后保”管理为中心的水稻机械超稀植高产栽培实用技术，采用此项技术公顷可产稻谷９～１０ｔ。 According to the development of rice cultivation in Heilongjiang Province in the recent ten years, the concept of “three modes” of rice cultivation density evolution has been summarized. According to the fact that the rice production in Heilongjiang reclamation area is dominated by coiling machine, the paper studies the growth and development characteristics of ultra-sparsely-paddy rice under the cold climatic conditions, and puts forward that the management of “preculture, middle promotion and post-preservation” Rice machinery ultra-thin planting high-yielding cultivation of practical technology, the use of this technology can produce rice hectare 9 ~ 10t.