Table 3.

Cumulative C mineralization (µg C g⁻¹ soil) in soils amended with different residues after 106 days of incubation.

		Decomposition kinetics model
Treatment	C mineralization (µg C g−1 soil)	C0 (mg g−1)	k (day−1)	R2
Rs	366.06 ± 15.47	0.340 ± 0.038	0.121 ± 0.009	0.94
Ri	413.70 ± 12.01	0.403 ± 0.030	0.076 ± 0.002	0.98
Ws	548.61 ± 13.75	0.501 ± 0.027	0.073 ± 0.005	0.94
Wi	666.77 ± 10.87	0.664 ± 0.023	0.042 ± 0.001	0.97
Ms	574.39 ± 9.05	0.560 ± 0.021	0.041 ± 0.002	0.98
Mi	556.56 ± 8.45	0.528 ± 0.019	0.041 ± 0.002	0.97
RWs	538.89 ± 11.80	0.488 ± 0.008	0.065 ± 0.003	0.93
RWi	610.02 ± 9.29	0.605 ± 0.042	0.040 ± 0.001	0.96
MWs	659.64 ± 11.94	0.622 ± 0.034	0.050 ± 0.002	0.96
MWi	549.12 ± 7.89	0.515 ± 0.003	0.044 ± 0.001	0.88
RWMbs	605.27 ± 16.09	0.554 ± 0.012	0.081 ± 0.004	0.93
RWMbi	640.41 ± 16.89	0.599 ± 0.052	0.075 ± 0.008	0.94
MWMBs	682.75 ± 13.58	0.544 ± 0.021	0.065 ± 0.004	0.96
MWMbi	600.10 ± 13.89	0.568 ± 0.042	0.070 ± 0.009	0.94
T15 [Control (only soil)]	121.59 ± 14.75	0.123 ± 0.024	0.029 ± 0.001	0.97
P values
Type	<0.001
Placement	<0.001
Time	<0.001
Type × placement	<0.001
Time × type	<0.001
Time × placement	<0.001
Time × type × placement	<0.001

Estimated mean values of the model parameters are presented. C₀, potentially mineralizable C and k, decomposition rate.

Rs: Rice, surface-applied. R_i: Rice, incorporated into the soils. Ws: Wheat, surface-applied. W_i: Wheat, incorporated into the soils. Ms: Maize, surface-applied. M_i: Maize, incorporated into the soils. RWs: Rice + wheat, surface-applied. RW_i: Rice + wheat, incorporated into the soils. MWs: Maize + wheat, surface-applied. MW_i: Maize + wheat, incorporated into the soils. RWMbs: Rice + wheat + mungbean, surface-applied. RWMb_i: Rice + wheat + mungbean, incorporated into the soils. MWMbs: Maize + wheat + mungbean, surface-applied. MWMb_i: Maize + wheat + mungbean, incorporated into the soils. Control: Only soil. For all treatments, n = 3 ± standard error of mean.