“多种高产”是当前我省发展粮食生产的一个主要方向。在多种条件下,如何确保粮食持续稳产高产,土壤肥力条件显然是个基础因素。为此系统定位观察在年种三熟(春粮、早稻、晚稻)条件下粮食产量和土壤肥力演变的相互关系,这对制定发展粮食生产的远景规划具有一定参考意义。本文就 “A variety of high-yielding” is the current development of food production in our province a major direction. Under various conditions, how to ensure a steady and high-yielding grain yield is clearly the underlying factor of soil fertility. For this purpose, the relationship between grain yield and soil fertility evolution under the conditions of three kinds of spring rice (spring grain, early rice and late rice) was systematically observed and observed. This is of some reference significance for formulating and developing the long-term planning of grain production. This article is