Drip irrigation technology can directly transport fertilizer and water to the root zone of crops and effectively improve the fertilizer utilization rate, but improper fertilization can lead to emitter blockage, reducing fertilization uniformity and resulting in crop yield loss. This paper tested the clogging performance of common emitters (inlaid cylindrical labyrinth emitter, E1; inlaid patch labyrinth emitter, E2; flanking labyrinth emitter, E3) with urea (UREA), sulfate of potassium (SOP), muriate of potash (MOP), monoammonium phosphate (MAP), and diammonium phosphate (DAP) at different concentrations (0 g/L, 0.4 g/L, 0.8 g/L, 1 g/L, 1.2 g/L, 1.6 g/L). Using field emission scanning electron microscopy (FESEM), surface energy spectrum analysis (EDS), and X-ray diffraction (XRD), the effects of fertilizer type and concentration on blockages and blocked substance accumulation were analyzed in an indoor accelerated irrigation experiment. The results showed that UREA and DAP are sensitive fertilizers for E2 and E3, respectively. With increasing fertilizer concentration, the decrease rate of the relative flow for E3 accelerated, and the Dra and CU of irrigation in E2 decreased with increasing irrigation events. The dry weight of blocked substances increased with the increase in irrigation events, which is consistent with the trend that the relative flow and uniformity of the emitter decreased with the increase in irrigation events. Upon increasing fertilizer concentration, the more chemical clogging substances increase, the less significant the water shear force. Therefore, we recommend that fertilizer concentration of DAP and UREA should not exceed 1.2 g/L. The results of this study can provide a basis for controlling chemical clogging and extending the service life of emitters.

滴灌技术可以将肥水直接输送到作物根区，有效提高肥料利用率，但施肥不当会导致滴头堵塞，降低施肥均匀度，造成作物减产。本文测试了常见滴头（镶嵌圆柱迷宫滴头，E1；镶嵌贴片迷宫滴头，E2；侧翼迷宫滴头，E3）与尿素（UREA）、硫酸钾（SOP）、氯化钾（MOP）、不同浓度（0 g/L、0.4 g/L、0.8 g/L、1 g/L、1.2 g/L、1.6 g/L）的磷酸一铵 (MAP) 和磷酸二铵 (DAP)。使用场发射扫描电子显微镜 (FESEM)、表面能谱分析 (EDS) 和 X 射线衍射 (XRD)，在室内加速灌溉试验中，分析了肥料种类和浓度对堵塞物和堵塞物质积累的影响。结果表明，尿素和磷酸二铵分别是E2和E3的敏感肥料。随着施肥浓度的增加，E3相对流量下降速度加快，E2 灌溉的Dra和 CU 随着灌溉事件的增加而降低。堵塞物质的干重随着灌溉事件的增加而增加，这与滴头的相对流量和均匀性随着灌溉事件的增加而下降的趋势一致。随着肥料浓度的增加，化学堵塞物质增加越多，水剪切力越不显着。因此，建议磷酸二铵和尿素的施肥浓度不超过1.2 g/L。该研究结果可为控制化学堵塞、延长滴头使用寿命提供依据。