Multiple substances in the reclaimed water would be easily coupled with the effective components of fertilizers applied in the drip irrigation system when reusing it in the farmland, making the drip irrigation emitters extremely easy to be clogged, and the mechanism becoming more complex. However, the effects of different fertilizer types on emitters clogging using the reclaimed water and the influential mechanism were not clear yet. Based on these, this paper systematically studied how would different types of fertilizers affect the biofilm growth within drip irrigation emitters through the indoor controllable simulation experiment. Three kinds of reclaimed water sources were applied as replications. The results showed that biofilm components (solid particles, SP; phospholipid fatty acid, PLFAs; extracellular polymeric substance, EPS) in different fertilizer treatments gradually increased during the 80 days operation. They grew relatively slowly for the first 40 days and much more rapidly in the following 40 days. Taking the most commonly used ammonium bicarbonate fertilizer (AB) as the controlled treatment (CK), merely the SP, PLFAs and EPS contents of the ammonium sulfate (AS) treatments increased by 2.94%, 10.8% and 1.34%, respectively. And the biofilm components in all other fertilizer treatments mentioned above were reduced, although the decreasing extents of potassium sulfate (PS) and calcium superphosphate (CS) treatments were not as significant as those of the urea phosphate (UP) and monopotassium phosphate (MP) treatments. This was closely related to the acidic solution conditions, which resulted in weaker adhesion abilities of the latter two fertilizers. Compared to SP, PLFAs and EPS contents in the AB fertilizer treatment, MP treatment reduced by 14.9%, 16.1% and 21.8%, respectively. Despite their differences, significant linear correlations of biofilm components were all observed among six fertilizer treatments (R² > 0.98, p < 0.05). From the perspective of effective control in biofilms’ accumulation, UP and MP were more suitable for drip irrigation system using the reclaimed water. The results obtained in this study could offer reliable guidance for appropriate fertilizer selection when reusing the reclaimed water in the drip irrigation systems.

当在农田中重复使用时，再生水中的多种物质很容易与滴灌系统中施用的肥料的有效成分结合在一起，使滴灌喷头非常容易被堵塞，并且机理变得更加复杂。但是，还不清楚不同肥料类型对使用再生水堵塞排放源的影响及其影响机理。在此基础上，本文通过室内可控的模拟实验，系统地研究了不同类型的肥料如何影响滴灌喷头内生物膜的生长。三种再生水源被用作复制品。结果表明，生物膜成分（固体颗粒，SP，磷脂脂肪酸，PLFA，细胞外聚合物，在80天的运营期间，不同肥料处理下的EPS）逐渐增加。在开始的40天内，它们的生长相对缓慢，而在接下来的40天内，它们的生长速度则更快。以最常用的碳酸氢铵肥料（AB）作为控制处理（CK），仅硫酸铵（AS）处理的SP，PLFA和EPS含量分别增加了2.94％，10.8％和1.34％。尽管硫酸钾（PS）和过磷酸钙（CS）处理的减少程度不如磷酸脲（UP）和磷酸一钾（MP）减少，但上述所有其他肥料处理中的生物膜成分均减少了。治疗。这与酸性溶液条件密切相关，酸性条件导致后两种肥料的粘附能力较弱。与AB处理相比，SP处理的PLFAs和EPS含量相比，MP处理分别减少了14.9％，16.1％和21.8％。尽管存在差异，但在六种肥料处理中均观察到了生物膜成分的显着线性相关性（R ²  ＞ 0.98，p  ＜0.05）。从有效控制生物膜积聚的角度来看，UP和MP更适合使用再生水的滴灌系统。在滴灌系统中重复使用再生水时，本研究中获得的结果可为选择合适的肥料提供可靠的指导。