Scientific Reports

Table 4 Correlation coefficients between CH₄ emissions and diffusive effluxes within the soil profiles among the different treatments from the rice-wheat annual rotations.

From: Effects of nitrogen and biochar amendment on soil methane concentration profiles and diffusion in a rice-wheat annual rotation system

Year	Diffusive flux	Treatment
Year	Diffusive flux	N0B0	N0B1	N1B0	N1B1	N1B2
2013–2014	7–0	0.207	0.048	0.299^*	0.347^*	0.501^**
	15–7	−0.151	0.209	0.144	−0.404^**	−0.519^**
	30–15	−0.050	0.244	0.050	−0.111	−0.141
	50–30	−0.318^*	0.110	−0.053	−0.353^*	−0.119
2014–2015	7–0	0.124	0.228	0.291^*	0.416^**	0.404^**
	15–7	−0.111	−0.093	−0.145	−0.506^**	−0.346^*
	30–15	0.105	−0.049	0.117	0.040	−0.111
	50–30	0.133	−0.116	−0.085	−0.178	−0.072

^*P < 0.05, ^**P < 0.01, ns not significant.

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