Moistube® irrigation (MTI) is a newly developed irrigation technique which uses semipermeable membranes to deliver water to the root zone precisely and slowly. The major objective of this study was to investigate the effects of different parameters (operating pressure head, placement depth of Moistube®) of MTI on infiltration behaviors and irrigation efficiency in clay loam soil. The results show that HYDRUS-2D model had a high accuracy in simulating water movement under MTI. Operating pressure head had substantial effect on the infiltration behaviors. The discharge of Moistube® and the wetting area in soil increased with the increasing operating pressure heads. Placement depth of Moistube® appreciably affected the time when wetting fronts reached the surface and bottom boundaries but had little effect on the discharge of Moistube® and advancing velocity of wetting fronts. Irrigation intensity was dominated by operating pressure head. High operating pressure head would decrease the capacity of water-saving while low pressure head may reduce crop yield. Burying the Moistube® at half the depth of the crop root zone is recommended for high irrigation efficiency when irrigating in clay loam soil. This study is expected to promote the understanding of MTI and bear some recommendations for improving water use efficiency in crop production.

Moistube®灌溉（MTI）是一项新开发的灌溉技术，它使用半透膜将水精确而缓慢地输送到根部区域。这项研究的主要目的是研究MTI的不同参数（操作压头，Moistube®的放置深度）对黏土壤土入渗行为和灌溉效率的影响。结果表明，HYDRUS-2D模型在MTI下模拟水运动具有很高的精度。操作压头对渗透行为有很大影响。随着工作压头的增加，Moistube®的排放量和土壤中的湿润面积也随之增加。Moistube®的放置深度会显着影响润湿前沿到达表面和底部边界的时间，但对Moistube®的排放和润湿前沿的前进速度几乎没有影响。灌溉强度主要由工作压力头决定。高操作压头会降低节水能力，而低压压头会降低作物产量。建议在粘土壤土中灌溉时，将Moistube®埋在作物根区深度的一半处以提高灌溉效率。这项研究有望增进对MTI的理解，并为提高作物生产中的用水效率提供一些建议。高操作压头会降低节水能力，而低压压头会降低作物产量。建议在粘土壤土中灌溉时，将Moistube®埋在作物根区深度的一半处以提高灌溉效率。这项研究有望增进对MTI的理解，并为提高作物生产中的用水效率提供一些建议。高操作压头会降低节水能力，而低压压头会降低作物产量。建议在粘土壤土中灌溉时，将Moistube®埋在作物根区深度的一半处以提高灌溉效率。这项研究有望增进对MTI的理解，并为提高作物生产中的用水效率提供一些建议。