水稻秧苗的地上部与根系是有机的统一整体。根系不仅是稻苗吸收水份、矿质营养及支持地上部的重要器官,周时也是植物体内物质代谢循环里许多重要物质的合成器官;而根系的生长所需要的养分也要地上部制造的养料来供给,所以秧苗地上部的生长状况好坏可通过根系的活动能力反映出来。所谓根系活力是指秧苗吸收、合成、生长的综合表现。它与 The shoots and roots of rice seedlings are a unified organic whole. Root system is not only the rice plant to absorb water, mineral nutrition and supporting the shoots of the important organs, weeks and plants during the material metabolism cycle is the synthesis of many important substances; and the growth of the root of the nutrients needed to shoot above ground to produce nutrients Therefore, the growth of the upper part of the seedlings can be reflected by the activity of the root system. The so-called root activity refers to the integrated absorption of seedlings, synthesis, growth. It and