highly significantp < 0.001
NO 3 − ‐N concentrations remained relatively stable across seasons, while NH 4 + ‐N was significantly elevated in summer and autumn, showing highly significant differences compared to winter and spring ( p < 0.001).
NO 3 − ‐N concentrations remained relatively stable across seasons, while NH 4 + ‐N was significantly elevated in summer and autumn, showing highly significant differences compared to winter and spring ( p < 0.001).