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Fig. 1 | Ecological Processes

Fig. 1

From: Effects of different forms of nitrogen addition on microbial extracellular enzyme activity in temperate grassland soil

Fig. 1

Percentage difference in soil extracellular enzyme activities following different forms of N treatment (Ntrt) compared to control treatment (CK) calculated as [(Ntrt − CK)/CK × 100%]. Asterisks (*) indicate significant differences for Tukey’s HSD test in multiple comparisons of different forms of N treatment from control (*P < 0.05; **P < 0.01). IN (N1, IN:ON = 10:0); Mixed N (N2, N3, N4, IN:ON = 7:3, 5:5, 3:7); ON (N5, IN:ON = 0:10). BG, β-1,4-glucosidase; CBH, cellobiohydrolase; POX, phenol oxidase; PER, peroxidase; NAG, β-1,4-N-acetyl-glucosaminidase; AP, acid phosphatase

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