Zheng QianqQing;Ming Li;Pengcheng Li;Jingjing Wang;Jiang JiYua

cistanche deserticola;soil moisture;cm;layer;irrigation;the sam

[Objective]To study the spatial and temporal distribution characteristics of sandy Cistanche deserticola soil moisture under the same point source drip irrigation,so as to effectively improve the soil water use efficiency and Cistanche deserticola yield. [Method]Cistanche deserticola was inoculated into the 3-year-old Haloxylon ammodendron which grew on the sand land,and then drip irrigated at the same discharge rate for 12 h,the changes of the moisture content at the horizontal and vertical direction were detected,so as to research the difference of soil moisture at different depth in different irrigation areas under the same irrigation discharge rate,and the spatial distribution characteristics of moisture content at the sand under different irrigation conditions. [Result]The relative humidity in the surface soil was significantly influenced by rainwater and irrigation water,the change of soil relative humidity was large at 0 -20 cm layer and relative stable at 20 -80 cm layer,the water consumption depth under nonirrigation treatment was at 60 -80 cm layer. After 12 h irrigation,the soil moisture was redistributed,the relative soil moisture content above 60 cm was higher than before by 27.1% -58.8%; the soil moisture was horizontally concentrated at 0 -30 cm layer,the moisture distribution and content was favorable to the high-efficient utilization of waters by Haloxylon ammodendron root and the growth of Cistanche deserticola. [Conclusion]This study could provide certain theoretical basis for moisture compensation technique of artificial planting sandy Cistanche deserticola under the drip irrigation.