Variation of tumorous stem index was from slow to quick growth pattern in earlier sowing date, while from quick to slow growth pattern in later sowing date. 播种晚则瘤茎横径线性增长持续时间短,纵径、干鲜质量增长速率低,而菜形指数的变化由慢到快的递增演变为由快到慢的递减。
Varied pace, sudden sudden quick slow, very tiring, extremely high demands on the cardiopulmonary function. 变速跑、突快突慢,非常消耗体力,对心肺功能要求极高。