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水稻直播栽培省工、增产,且劳动生产率高,已成为上海市郊推广面积最大的稻作新农艺。直播稻前期生长环境条件好,苗众蘖多,但调控不力,往往发苗过头,导致中后期个体变小,制约高产。作者在继承本县移栽稻“小群体、壮个体、高积累,争取一定穗数、主攻穗大粒重”的技术路线基础上,借鉴国内稻作研究新成果,将水稻“三高一稳”栽培法和“群体质量优化调控”理论应用于直播单季晚稻,多年来进行了直播稻适度群体、优化质量和主攻穗重的栽培技术研究。本文着重阐述中后期群体质量优化调控。
Direct-seeded rice cultivation saves labor, increases production, and has high labor productivity. It has become the most populous new agronomic rice cultivation project in the suburbs of Shanghai. Direct seeding early rice growth environment conditions are good, Miao numerous tillers, but ineffective regulation, often hair too much, resulting in the late individual smaller, restricting the high yield. Based on the technical route of inheriting the small transplanting rice in this county, such as “small population, strong individual, high accumulation, gaining a certain number of spikes, Cultivation method and the theory of ”population quality optimization and regulation" are applied to the direct seeding single cropping late rice. Over the years, research has been conducted on the cultivation techniques of the moderate population, the optimized quality and the main spike weight of direct seeding rice. This article focuses on the optimization of quality control in the late period.