本组于去年11—12月,曾到北京郊区进行冬小麦苗期的调查。在调查中,看到不少丰产试验田的小麦根系发生不正常的生长现象,这种根生长得很短,有些仅达1—3厘米,并在根尖发生膨大。由于它的形状很似“鸡爪”(见图1、2),故名之为“鸡爪”根。具有这种根的麦苗,其他上部分矮小,并发生黄 This group in November-December last year, went to the outskirts of Beijing winter wheat seedling investigation. During the survey, we saw abnormal growth of wheat roots in many high-yielding experimental fields. The roots grew very short, some of them were only 1-3 cm in diameter, and swollen at the root tip. Because of its shape is similar to “chicken feet ” (see Figure 1,2), hence the name of “chicken feet ” root. Wheat seedlings with this root, other upper parts are short and yellowish