Fig. 1. Effect sizes of nitrogen (N), phosphorus (P), nitrogen+phosphorus (NP), phosphorus+potassium (PK), nitrogen+phosphorus+potassium (NPK), organic fertilizers (OF), and organic fertilizers + NPK (OF+NPK) on soil total PLFA. The error bars indicate effect sizes and 95% bootstrap confidence intervals. The effect was statistically significant if the 95%CI did not bracket zero. The dashed line is drawn at effect size = 0. The sample size for each variable is shown next to the bar.

Fig. 2. Effect sizes of nitrogen (N), phosphorus (P), nitrogen+ phosphorus (NP), nitrogen+phosphorus+potassium (NPK), organic fertilizers (OF), and organic fertilizers+NPK (OF+ NPK) on soil (a) fungi, (b) bacteria and (c) actinomycetes. The error bars indicate effect sizes and 95% bootstrap confidence intervals. The effect was statistically significant if the 95%CI did not bracket zero. The dashed lines are drawn at effect size = 0. The sample size for each variable is shown next to the bar.

Fig. 3. Effect sizes of nitrogen (N), phosphorus (P), nitrogen+phosphorus (NP), nitrogen+phosphorus+potassium (NPK) and organic fertilizers (OF) on soil (a) gram-positive bacteria, and (b) gram-negative bacteria. The error bars indicate effect sizes and 95% bootstrap confidence intervals. The effect was statistically significant if the 95%CI did not bracket zero. The dashed lines are drawn at effect size = 0. The sample size for each variable is shown next to the bar.

Fig. 4. Effect sizes of nitrogen (N), phosphorus (P), nitrogen+phosphorus (NP), and nitrogen+phosphorus+potassium (NPK) on the ratio of soil fungi to bacteria (F/B ratio). The error bars indicate effect sizes and 95% bootstrap confidence intervals. The effect was statistically significant if the 95%CI did not bracket zero. The dashed line is drawn at effect size = 0. The sample size for each variable is shown next to the bar.

Fig. 5. Effect sizes of nitrogen (N) on PLFA, fungi, bacteria, actinomycetes, gram-positive bacteria (G⁺) and gram-negative bacteria (G^-) in (a) forest (b) grassland and (c) cropland. The error bars indicate effect sizes and 95% bootstrap confidence intervals. The effect was statistically significant if the 95%CI did not bracket zero. The dashed lines are drawn at effect size = 0. The sample size for each variable is shown next to the bar.

Fig. 6. Effect sizes of (a) ammonium nitrate and (b) urea on PLFA, fungi, bacteria, actinomycetes, gram-positive bacteria (G⁺) and gram-negative bacteria (G^-). The error bars indicate effect sizes and 95% bootstrap confidence intervals. The effect was statistically significant if the 95%CI did not bracket zero. The dashed lines are drawn at effect size = 0. The sample size for each variable is shown next to the bar.