Reclaiming Subsidized Land: An Evaluation of Coal Gangue Interlayers

Table 6

Total and available potassium of interlayered soil profiles.

	Treatment	0–10 cm	20–30 cm	40–50 cm	60–70 cm	80–90 cm	100–110 cm
TK (g/kg)	CK1	18.80 ± 0.10a	18.78 ± 0.38a	18.09 ± 0.42a	17.57 ± 0.21a	17.10 ± 0.24a	17.41 ± 0.29a
	CK2	19.05 ± 0.59a	18.85 ± 0.75a	17.85 ± 0.59ab	15.36 ± 0.12b	11.50 ± 0.11c	11.42 ± 0.28b
	T1	18.78 ± 0.08ab	18.18 ± 0.17ab	11.55 ± 0.08c	17.68 ± 0.31a	12.14 ± 0.27b	11.29 ± 0.21bc
	T2	17.90 ± 0.13abc	17.33 ± 0.31b	11.56 ± 0.31c	11.42 ± 0.35c	17.45 ± 0.35a	11.35 ± 0.12bc
	T3	18.75 ± 0.79ab	17.21 ± 0.17b	10.76 ± 0.33 cd	10.68 ± 0.13 cd	17.18 ± 0.10a	11.30 ± 0.12bc
	T4	17.57 ± 0.21bc	17.80 ± 0.23ab	10.05 ± 0.10d	17.79 ± 0.33a	17.40 ± 0.17a	11.08 ± 0.10bc
	T5	18.56 ± 0.07ab	17.91 ± 0.37ab	10.76 ± 0.19 cd	10.25 ± 0.17d	17.17 ± 0.22a	10.39 ± 0.12d
	T6	17.69 ± 0.51bc	18.05 ± 0.54ab	17.45 ± 0.39ab	10.35 ± 0.24d	17.21 ± 0.24a	10.84 ± 0.17c
	T7	18.56 ± 0.27ab	18.01 ± 0.41ab	17.19 ± 0.29b	10.90 ± 0.39 cd	17.73 ± 0.11a	10.80 ± 0.09c
	T8	17.36 ± 0.22c	17.16 ± 0.30b	11.18 ± 0.14c	11.14 ± 0.51 cd	17.34 ± 0.15a	11.10 ± 0.07bc
AK (mg/kg)	CK1	215.80 ± 3.69a	208.87 ± 8.04a	203.67 ± 12.44ab	200.20 ± 12.91ab	194.13 ± 12.15a	197.60 ± 10.29a
	CK2	218.40 ± 2.14a	210.30 ± 12.85a	190.27 ± 19.27ab	188.50 ± 15.07b	227.93 ± 14.59a	230.53 ± 10.36a
	T1	198.47 ± 5.87b	187.60 ± 11.03ab	225.07 ± 13.58ab	204.00 ± 13.64ab	232.07 ± 13.36a	229.67 ± 12.97a
	T2	197.6 ± 4.25b	181.53 ± 6.13ab	233.87.87 ± 17.48a	232.27 ± 13.92ab	201.20 ± 12.51a	237.47 ± 14.30a
	T3	196.73 ± 1.52b	185.00 ± 3.68ab	220.80 ± 17.76ab	240.93 ± 13.93a	204.10 ± 13.96a	227.40 ± 13.41a
	T4	204.53 ± 2.47b	189.40 ± 4.90ab	235.60 ± 10.00a	206.97 ± 12.20ab	201.07 ± 14.97a	225.80 ± 14.16a
	T5	199.33 ± 4.42b	191.27 ± 7.44ab	227.40 ± 16.05ab	223.73 ± 10.80ab	206.40 ± 14.79a	229.53 ± 14.27a
	T6	201.07 ± 6.49b	190.20 ± 14.86ab	182.80 ± 10.99b	228.80 ± 12.42ab	205.07 ± 13.90a	226.27 ± 13.15a
	T7	207.20 ± 4.61b	192.93 ± 8.49ab	180.60 ± 16.33b	230.33 ± 10.62ab	207.53 ± 17.98a	220.60 ± 13.87a
	T8	196.73 ± 2.45b	175.53 ± 5.03b	222.07 ± 12.49ab	225.60 ± 13.75ab	209.17 ± 12.43a	222.73 ± 10.82a