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【目的】为了测试新研发的作物主动式土壤水分平稳供应装置性能。【方法】本文设置了不同控压水平的土槽试验，对该装置进行了控制负压能力和土壤湿润锋运移测定。【结果】（1）该装置可通过调整负压控制装置的数量和控压粗管内水柱高度将土壤负压控制在目标值附近，在-15 k Pa 以内的控制压力下，负压变幅极小。（2）该装置供水条件下，土壤水分的横向运移要强于垂向运移，但土壤湿润范围随负压控制装置数量的增多而减小；土壤湿润锋横向推进距离与灌水历时呈很好的幂函数关系，且随着负压控制装置数量的增多，土壤水分横向运移速度变慢。【结论】该装置可以实现对水分的连续自动获取，有望用于作物灌溉之中。
【Objective】 In order to test the performance of the newly developed crop active soil moisture supply system. 【Method】 In this paper, soil-tank tests with different control pressure levels were set up, and the negative pressure control ability and soil wetting front migration were measured. 【Result】 (1) Under the control pressure of -15 kPa, the device can control the negative pressure of soil near the target value by adjusting the number of negative pressure control devices and the height of water column in the coarse pressure pipe. small. (2) Under the condition of water supply, the lateral migration of soil moisture is stronger than vertical migration, but the wetting range of soil decreases with the increase of the number of negative pressure control devices. The lateral advancing distance and irrigation duration of soil wetting front are very good Power function, and with the increase of negative pressure control device, the speed of soil moisture translocation slows down. 【Conclusion】 The device can achieve continuous and automatic water harvesting and is expected to be used in crop irrigation.