30-Month Pot Experiment: Biochar Alters Soil Potassium Forms, Soil Properties and Soil Fungal Diversity and Composition in Acidic Soil of Southern China.

Furthermore, the NEK showed an increasing trend during incubation and reached its maximum after 30 months ( Figure 1 and Table S4 ).

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Our SEM analysis found that soil physiochemical properties and K components had weak effects on soil fungi, and soil enzyme activity had a highly significant effect on soil fungi (path coefficient = 0.44) ( Figure 6 A).

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The application of biochar increased pH by 0.38–0.51 units, compared to fertilizer alone, and pH showed a decreasing trend with K fertilizer addition ( Table 1 ).

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