Effects of irrigation models on the space distribution of root system and yield of winter wheat

In this paper,different irrigation methods,including basin irrigation,drip irrigation and subsur face drip irrigation,and four irrigation schedules for each irrigation method were selected to investigate the effects of different irrigation models on the space distribution of root system and yield of winter wheat by field experiment for three years.The results revealed that irrigation methods affect the space distribution of root system obviously under the same irrigation schedule.The basin irrigation and drip irrigation significant ly boosted space distribution of root system at 0~50cm soil layer compared to subsurface drip irrigation,but the space distribution of root system appeared even at 0~100cm soil layer under subsurface drip irriga tion.The research results also revealed the positive correlation of crop yield to irrigation norm,and the irri gation schedules had significant effect on crop yield,and drip irrigation models could attain continuous and stable crop yields for many years compared with basin irrigation.In addition,drip irrigation models had no table advantages in terms of increasing crop yield compared with basin irrigation under deficit irrigation.