一、前言关于光照阶段开始时期的问题,虽然前人曾作过不少的工作。并且指出了植物是在出苗之后发育到一定的状态才接受最适光照条件影响的。但是查阅有关光照阶段研究和光照阶段长度分析的许多文章,确常常遇到把出苗之日当作光照阶段开始,从而引起光照阶段长度分析发生错误的情况。由于上述的错误严重地影响到对于光照阶段发育规律、光照阶段长度的分析和研究, I. Preface As for the question about the beginning of the light stage, many predecessors have done a lot of work. It is also pointed out that the plant is affected by the optimum light conditions after its emergence to a certain state. However, many articles on the study of the illumination stage and the length of the illumination stage often do encounter the problem of starting the emergence stage as the beginning of the illumination stage, causing errors in the length analysis of the illumination stage. As the above errors seriously affect the development of the light phase of the law, the length of light phase analysis and research,