Effects of nitrogen and sulfur deposition on CH₄ and N₂O fluxes in high-altitude peatland soil under different water tables in the Tibetan Plateau

Figures & data

Table 1 Soil characteristics in the study site

Depth (cm)	pH	OC (g kg^−1)	TN (g kg^−1)	C/N	TP (g kg^−1)
0–10	5.33 ± 0.07	252.51 ± 10.05	20.80 ± 1.28	12.16 ± 0.67	0.88 ± 0.06
10–20	5.17 ± 0.04	229.89 ± 16.91	19.62 ± 1.09	11.72 ± 0.75	0.80 ± 0.04
20–30	5.28 ± 0.06	218.54 ± 13.88	19.28 ± 0.74	11.29 ± 0.50	0.77 ± 0.03

OC, organic carbon; TN, total nitrogen; C/N, carbon/nitrogen; TP, total phosphorus. Values are means and standard errors for four replicate samples.

Figure 1 The methane (CH₄) fluxes in control (C), nitrogen (N), sulfur (S) and both nitrogen and sulfur (NS) additions under (a) low water table and (b) high water table during the investigation period. Values are means and standard errors for five replicate samples.

Figure 2 The nitrous oxide (N₂O) fluxes in control (C), nitrogen (N), sulfur (S) and both nitrogen and sulfur (NS) additions under (a) low water table and (b) high water table during the investigation period. The panel situated in the upper right-hand corner of the figure is to show N₂O fluxes from day 8 to day 40 more clearly. Values are means and standard errors for five replicate samples.

Figure 3 The cumulative methane (CH₄) and nitrous oxide (N₂O) emissions in control (C), nitrogen (N), sulfur (S) and both nitrogen and sulfur (NS) additions under (a, c) low water table and (b, d) high water table during the investigation period. Values are means and standard errors for five replicate samples. Different letters indicate significant differences at P < 0.05 using the least significant difference (LSD) test.