The difference of root length was not significant during shooting stage, root length was longer as times of drip fertigation was increased during spike formation stage;

• 在拔节期，各滴灌施肥处理之间的根系总长差异不大，但到大喇叭口期时，则表现为滴灌施肥次数越多的处理，其根系总长也越大；