关键词: 玉米, 水肥处理, 生长动态

Abstract: The corn growing dynamics was studied by using the 5 treatments of nutrition and water in Naiman Desertification Research Station in Inner Mongolia. The results show that the fast high growing stage of the 5 treatments all started in the last ten days of June and reached the maximun in early August; Corn in applying no fertilizer plots stopped growth of height and stem thick more early than the others. Fine root's number increased rapidly from the end of June and continued for one month. The increasing rate of roots in high applying fertilizer plots was larger than that in the others; In no irrigation plots, the corn root's numer increased rapidly by the rainy season in early July; In no top application plots roots stopped growth 7 days earlier than that in the other treatments. The root growth dynamics of all different treatments have similar curve with one peak. The yield of corn was the highest in most applying fertilizer treatment plots and the lowest in no fertilizer plots.

Key words: Corn, Treatments with fertilizer and water, Growing dynamics