Table 1 Soil physicochemical properties and enzyme activities during continuous cropping of C. kwangsiensis.

From: Continuous cropping alters rhizosphere microbial communities and soil properties reducing Curcuma Kwangsiensis yield

Treatments

Y0

Y1

Y2

pH

5.07 ± 0.02a

4.67 ± 0.04b

4.07 ± 0.06c

SOC (g/kg)

13.13 ± 0.09b

13.86 ± 0.60b

18.92 ± 0.96a

TN (mg/kg)

1.34 ± 0.04b

1.41 ± 1.04b

1.99 ± 0.02a

TP (µg/kg)

119.53 ± 11.91c

178.01 ± 15.82b

310.75 ± 7.42a

TK (µg/kg)

11402.03 ± 705.85ab

9974.22 ± 423.13b

11724.12 ± 914.35a

AN (mg/kg)

49.68 ± 1.94b

51.16 ± 1.06b

74.70 ± 7.75a

AP (µg/kg)

30.16 ± 7.45c

52.95 ± 4.37b

308.03 ± 6.59a

AK (µg/kg)

247.85 ± 11.29b

298.24 ± 9.24b

468.90 ± 6.64a

S_ACP (mg/g)

112.70 ± 16.97b

203.16 ± 6.84a

108.05 ± 15.72b

S_UE (mg/g)

603.95 ± 6.49ab

687.62 ± 77.15a

498.09 ± 57.92b

S_CAT (mg/g)

127.02 ± 4.05c

497.73 ± 20.10a

387.99 ± 6.49b

  1. Y0, Y1 and Y2 represent planting years for 0, 1 and 2 years, respectively. SOC, soil organic carbon; TN, total nitrogen; TP, total phosphorus; TK, total potassium; AN, available nitrogen; AP, available phosphorus; AK, available potassium; S_ACP, soil acid phosphatase; S_UE, soil urease; S_CAT, soil catalase. Data are mean ± SE. Different lowercase letters indicate significant differences (p < 0.05).
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