Response of Soil C and N, Dissolved Organic C and N, and Inorganic N to Short-Term Experimental Warming in an Alpine Meadow on the Tibetan Plateau

Table 2

Single factor linear regressions between soil properties (soil organic C, SOC; total N, TN; dissolved organic C, DOC; dissolved organic N, DON; nitrate N, NO₃⁻-N; ammonium N, NH₄⁺-N; the ratio of NH₄⁺-N to NO₃⁻-N, NH₄⁺-N/NO₃⁻-N; soil inorganic N, N_min) and soil temperature (𝑇_𝑠), soil microbial biomass C (MBC), and N (MBN) showing regression parameters (slope, constant, 𝑅², and 𝑃). MBC and MBN data were obtained from Fu et al. [20].

Independent; variable	Regression; parameters	SOC	TN	DOC	DON	NO3^−-N	NH4^+-N	NH4^+-N/NO3^−-N	Nmin
𝑇𝑠	Slope	−5.29	−0.32	−7.90	−0.53	−0.03	−1.71	−0.43	−1.74
	Constant	100.76	6.81	195.37	13.28	5.73	31.38	7.66	37.11
	𝑅^2	0.63	0.64	0.38	0.21	0.001	0.31	0.41	0.21
	𝑃	<0.001	<0.001	<0.01	0.057	0.93	<0.05	<0.01	0.056
MBC	Slope	0.05	0.003	0.10	0.01	0.01	0.03	0.004	0.03
	Constant	6.46	1.24	46.29	2.89	3.34	−3.20	0.04	0.14
	𝑅^2	0.76	0.66	0.70	0.51	0.13	0.92	0.47	0.82
	𝑃	<0.001	<0.001	<0.001	<0.001	0.139	<0.001	<0.01	<0.001
MBN	Slope	0.28	0.01	0.68	0.05	0.06	0.17	0.02	0.23
	Constant	10.56	1.58	43.22	2.93	1.60	−3.28	0.41	−1.69
	𝑅^2	0.43	0.30	0.68	0.42	0.39	0.79	0.25	0.88
	𝑃	<0.01	<0.05	<0.001	<0.01	<0.01	<0.001	<0.05	<0.001