The operation patterns of drip irrigation fertigation system have significant impacts on the emitter clogging. Exploring the dynamic variation and influence mechanism of mineral components in clogging substances under different operation patterns can provide suitable guidance for fertigation management models. In this study, an emitter clogging experiment was conducted through three operating irrigation patterns (once per day, OP1/1; once every 4 days, OP1/4; once every 7 days, OP1/7) by running high-sediment surface water under the potassium dihydrogen phosphate (PDP) fertigation. The X-ray diffractometer was used to identify the mineral components. The results indicated that the primary mineral components in the emitter clogging materials were quartz, silicate, and carbonate and their contents accounted for more than 97% of the total. The components showed a dynamic process of slow growth followed by rapid growth. And there was a significant correlation between mineral compositions and the clogging degree (R2 > 0.86). The application of PDP fertilizer did not generate phosphate precipitation in the emitters directly, but accelerated the carbonates precipitation through adsorption influence of phosphate fertilizers instead. The contents of quartz, silicate, and carbonate were at their highest levels in OF1/7 followed by OP1/4, and then at their lowest in OP1/1 due to the difference time of applying P fertilizer time in three operating patterns. Both the relative discharge (Dra) and uniformity coefficient (CU) of the drip emitters also showed similar trends for the all eight types of emitters that were tested in this experiment.

中文翻译：

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滴灌磷肥系统滴灌器堵塞物质矿物成分的不同操作模式

滴灌施肥系统的运行方式对滴头堵塞有显着影响。探索不同操作模式下堵塞物质中矿物成分的动态变化及其影响机制，可为灌溉施肥管理模式提供合适的指导。在这项研究中，通过三种操作灌溉模式（每天一次，OP1/1；每 4 天一次，OP1/4；每 7 天一次，OP1/7）进行了排放口堵塞实验磷酸二氢钾 (PDP) 灌溉施肥。X射线衍射仪用于鉴定矿物成分。结果表明，灌水器堵塞材料中的主要矿物成分为石英、硅酸盐和碳酸盐，其含量占总量的97%以上。各组成部分呈现出缓慢增长后快速增长的动态过程。并且矿物成分与堵塞程度之间存在显着相关性（R2 > 0.86）。PDP肥的施用不直接在排放源产生磷酸盐沉淀，而是通过磷肥的吸附作用加速碳酸盐沉淀。由于三种作业模式施磷时间不同，石英、硅酸盐和碳酸盐含量在OF1/7中最高，其次是OP1/4，OP1/1最低。滴灌灌水器的相对流量 (Dra) 和均匀系数 (CU) 也显示出在本实验中测试的所有八种类型的灌水器的相似趋势。