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Ecological Processes
Fig. 5 | Ecological Processes

Fig. 5

From: Enhanced carbon acquisition and use efficiency alleviate microbial carbon relative to nitrogen limitation under soil acidification

Fig. 5

Effects of S addition on threshold element ratios (TER, a), carbon-use efficiency (CUE, b), and nitrogen-use efficiency (NUE, c). Bar indicates the mean value (± 1 standard error) for each treatment. Different lowercase letters above bars indicate significant differences among different S addition rates at the level of P < 0.05. The scatter subplot in each panel demonstrates the relationship between soil pH and corresponding variables, the linear regression is fitted when P < 0.05 (with R2 and P shown). The gray area represents 95% confidence interval

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