一般都认为稻株地上部的性状,它们在成长过程中的变化是和根的生态生理特点密切相关的,但是在多数方面都没有好好验证过。因此设计了一些试验来研究不同株型的品种根与地上部的关系,也研究了同一品种在不同栽培条件下的这种关系,所得结果如下。1.在研究稻株分蘖和根的关系上,发现分蘖多的品种,其高节位的根比以下节位的根要重些,活力也高一些,在能促进分蘖的栽培条件下也是如此。反之,当品种的分蘖与穗数不多时,或者把氮肥施到深层时,则下部节位的根比上部节位的重些,活力也较强。可以这样说,穗数型的品种根是分布在土壤表层,活力也较强。穗数型品种一般分蘖多而植株矮,地上部也大部分接近 It is generally accepted that the traits of shoots in shoots are closely related to the ecophysiological characteristics of roots during their growth, but they have not been well verified in most aspects. Therefore, some experiments were designed to study the relationship between roots and shoots of different plant types and to study the relationship of the same cultivars under different cultivation conditions. The results obtained are as follows. 1. In the study of the relationship between tillers and roots of rice plants, it was found that the varieties with more tillers had more root vigor and higher vigor than the following ones, as was the cultivation condition that can promote tillering . On the contrary, when the varieties of tillers and spikes few, or the nitrogen fertilizer applied to the deep, then the lower node of the roots than the upper node heavier vitality. It can be said that the spike type root is distributed in the soil surface, vitality is also strong. Spike number of varieties generally tillers and plants shorter, most of the ground above the part