Chemical and Biological Technologies in Agriculture

Table 1 Physicochemical properties and enzyme activities of CC and CK soils

From: Effects of continuous cropping of Pinellia ternata (Thunb.) Breit. on soil physicochemical properties, enzyme activities, microbial communities and functional genes

Item	CK	CC
pH	7.630 ± 0.012	7.080 ± 0.021***
Total N (g kg⁻¹)	1.086 ± 0.009	1.157 ± 0.009
Available N (mg kg⁻¹)	22.167 ± 1.65	28.00 ± 0.000*
Organic C (g kg⁻¹)	4.199 ± 0.019	4.873 ± 0.007
Total P (g kg⁻¹)	0.381 ± 0.001	0.356 ± 0.007*
Available P (mg kg⁻¹)	32.500 ± 0.500	72.133 ± 1.050***
Total K (g kg⁻¹)	2.792 ± 0.062	3.423 ± 0.113**
Available K (mg kg⁻¹)	94.333 ± 1.427	184.000 ± 1.414***
TPA (μg g⁻¹)	34.900 ± 0.000	51.368 ± 0.751**
Ure (μg (g h)⁻¹)	24.528 ± 0.739	3.656 ± 0.508***
CAT (mg (g 20 min)⁻¹)	0.382 ± 0.013	0.361 ± 0.014***
PPO (μg (g h)⁻¹)	103.733 ± 4.745	55.289 ± 1.663**
Suc (mg (g d)⁻¹)	4.127 ± 0.189	2.657 ± 0.046**

CC continuous cropping, CK control check, Ure urease, CAT catalase, PPO polyphenol oxidase, Suc sucrose, TPA total phenolic acid
Asterisks in the same row indicate significant difference test by Student’s t-test (“*”, p < 0.05; “**”, p < 0.01; “***”, p < 0.001)

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