正确的判断一个品种进入生殖生长的时间,这对确定一个品种的种性,掌握不同品种的适宜播种期,了解不同栽培措施对小麦生长发育的影响都有十分重要的实践意义。以往将小麦茎生长锥长大于宽时作为小麦开始进入生殖生长时期(伸长期)的主要标志。近几年来为了教学与科研的需要,我们对小麦由营养生长进入生殖生长过程的形态特征进行了详细的观察。在观察的过程中始终未见到生长锥长大于宽的时期,为了澄清这一问题,现将我们观察的结果作一初步总结。以示得到大家的帮助共同解决这一问题。 Correctly judging the time for a variety to enter reproductive growth is of great practical significance for determining the variety of a variety, grasping the suitable sowing date of different varieties, and understanding the effects of different cultivation measures on the growth and development of wheat. In the past when the wheat stem growth cone is longer than the width as the beginning of wheat into the reproductive growth period (elongation) of the main signs. In recent years for teaching and research needs, we have carried out a detailed observation of the morphological characteristics of wheat from vegetative growth into reproductive growth. In the process of observation, the length of the growth cone is always not longer than the width of the growth cone. To clarify this problem, we first make a preliminary summary of the observations. To show everyone’s help to solve this problem together.