Table 2. Two-way ANOVA of the effects of straw incorporation (S) and biochar applied (C) on cumulative N₂O emissions, cumulative NH₃ volatilization, and soil moisture, NO₃⁻−N, NH₄⁺−N, total N (TN), soil organic matter (SOM) content, and pH in the 0−10 cm, 10−20 cm, and 20−40 cm soil layers.

Parameters			S		C		S*C
			F	Sig.	F	Sig.	F	Sig.
N emissions	N2O		5.819	0.028*	5.669	0.008**	24.382	0.000***
	NH3		375.988	0.000***	44.616	0.000***	21.786	0.000***
Soil conditions	0−10 cm	Moister	1.741	0.206	22.019	0.000***	3.488	0.040*
		NO3−−N	37.266	0.000***	2.716	0.079	5.100	0.011*
		NH4+−N	0.629	0.439	5.192	0.011*	0.774	0.525
		pH	49.973	0.000***	5.349	0.010*	6.081	0.006**
		TN	37.371	0.000***	0.703	0.564	0.685	0.574
		SOM	5.732	0.029*	2.106	0.140	1.138	0.363
		C/N	2.081	0.168	5.798	0.007**	1.883	0.173
	10−20 cm	Moister	4.124	0.059	10.617	0.000***	1.072	0.389
		NO3-−N	0.019	0.893	1.946	0.163	5.838	0.007**
		NH4+−N	4.351	0.053	1.515	0.249	6.335	0.005**
		pH	84.566	0.000***	7.299	0.003**	46.246	0.000***
		TN	8.100	0.012*	0.390	0.762	1.508	0.250
		SOM	15.973	0.001**	1.605	0.227	7.874	0.002**
		C/N	0.031	0.863	1.121	0.370	5.420	0.009**
	20−40 cm	Moister	9.000	0.008**	4.529	0.018*	5.843	0.094
		NO3-−N	0.098	0.759	1.484	0.257	0.268	0.848
		NH4+−N	5.995	0.026*	1.020	0.410	2.687	0.081
		pH	13.157	0.002**	1.947	0.163	7.502	0.002**
		TN	25.790	0.000***	4.710	0.015*	10.801	0.000***
		SOM	22.279	0.000***	2.765	0.076	5.610	0.008**
		C/N	0.366	0.554	0.978	0.428	1.366	0.289

*, ** and *** represent the 0.05, 0.01 and 0.001 significance levels, respectively.