Fig. 3From: Pre-activated biochar by fertilizers mitigates nutrient leaching and stimulates soil microbial activitySoil respiration types. a Basal respiration and respirations induced by b D-glucose, c N-acetyl-β-D-glucosamine, d D-mannose, e L-alanine, f D-trehalose. Mean values (n = 4) ± standard error of mean, different letters indicate differences among treatments at the statistical level of significance p ≤ 0.05Back to article page