Table 1 Soil properties according to the different cropping systems of flue-cured tobacoo.

From: Response of soil fungal communities to continuous cropping of flue-cured tobacco

 

pH

SOC (g kg−1)

TN (g kg−1)

NO3−-N (mg kg−1)

NH4+-N (mg kg−1)

Ava-P (mg kg−1)

Ava-K (mg kg−1)

Sucrase (mg kg−1)

Urease (mg kg−1)

Catalase (mg kg−1)

3 yr

6.02 b

16.024 b

1.64 b

12.200 b

22.210

13.169 b

185.241 a

8.233

1.176 b

1.584 a

5 yr

6.13 a

15.609 b

2.42 a

14.590 b

29.980

31.656 a

133.041 b

8.03

1.019 b

1.287 b

CK

6.20 a

29.802 a

2.216 a

22.110 a

20.730

11.638 b

186.752 a

6.673

2.571 a

1.652 a

D.F

8

8

8

8

8

8

8

8

8

8

P value

0.01**

0.01**

0.01**

0.02**

ns

0.01**

0.01**

ns

0.01**

0.042**

  1. Different letters and asterisk indicated significant differences among soil samples as calculated by One-way ANOVA and t test. Two asterisks indicated significant differences at the P < 0.01 level. SOC: soil organic carbon, TN: total nitrogen, NO3–-N: nitrate-nitrogen, NH4+-N: ammonium-nitrogen, Ava-P: available phosphorus, Ava-K: available potassium, ns: not significant (P > 0.05). 3ys: continuous cropping of flue-cured tobacco for 3 years. 5ys: continuous cropping of flue-cured tobacco for 5 years. CK: flue-cured tobacco cropping for 1 year. D.F. : degree of freedom.
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