1970年代早、中稻品种作“倒种春”栽培的调查研究

Research on Early Rice,Precocious Middle-season Rice Cultivated as the“Dao Zhong Chun”in 1970s

"倒种春"是指将当年收获的早稻种作晚稻栽培的一种方式,源自一项古老的传统技术。上世纪六十年代末至七十年代前期,双季稻推广"两迟当家"和"早矮晚粳"品种安排模式,以农垦58为主的迟熟晚粳占了晚稻总面积的70%以上,而发展三熟制需要一批早熟的晚籼品种。于是,人们想到利用早籼作连晚栽培这个方法,使得"倒种春"一度兴起,占据晚稻总面积的20%以上,成为农垦58的最佳搭配品种。作者以自身的实践和有关资料,系统阐述倒种春探源、生长特性、栽培技术和增产效果等,作为一篇史料,供读者参考。

＂Dao zhong chun＂refers to the way of using the early harvested rice seeds and then cultivating as the late rice,which derived from an old traditional technology.During the late 1960s and early 1970s,this method was once popularized,with late japonica,occupied more than 20% of the total rice area.This paper systematically expounded the origin,growth characteristics,cultivation techniques and increase yield of＂Dao zhong chun＂,providing readers with a historical data.