Table 1 Summary of soil physicochemical properties in the unfertilized and fertilized tea plantation of CSA and CSS.

From: Increased organic fertilizer significantly increases leaf nitrogen and phosphorus but not carbon content in a tropical tea plantation

Variables

CSA

CSS

Sheep manure fertilizer

Unfertilized

Fertilized

Unfertilized

Fertilized

SOC (g/kg)

21.74 ± 0.29b

23.42 ± 0.34a

21.04 ± 0.75b

25.09 ± 0.72a

–

Organic matter (g/kg)

–

–

–

–

324

Total N (g/kg)

1.36 ± 0.05b

1.96 ± 0.02a

1.99 ± 0.05b

2.18 ± 0.06a

7.93

Total P (g/kg)

0.49 ± 0.02b

0.79 ± 0.01a

0.56 ± 0.01b

0.62 ± 0.02a

11.60

C: N ratio

16.67 ± 0.68a

11.99 ± 0.18b

10.56 ± 0.23b

11.54 ± 0.20a

23.70

C: P ratio

47.66 ± 2.87a

29.77 ± 0.62b

38.34 ± 1.73a

41.06 ± 0.88a

16.20

N: P ratio

3.07 ± 0.22a

2.48 ± 0.03b

3.63 ± 0.14a

3.58 ± 0.09a

0.68

pH

5.92 ± 0.02a

4.45 ± 0.02b

5.57 ± 0.06a

4.58 ± 0.08b

7.92

SMC (%)

20.06 ± 1.10b

44.18 ± 1.02a

19.92 ± 0.48b

34.03 ± 0.33a

32.40

NO3−-N (mg/kg)

10.78 ± 0.64a

5.30 ± 0.36b

8.62 ± 0.81a

5.39 ± 0.51b

900

NH4+-N (mg/kg)

12.68 ± 0.90b

19.29 ± 1.06a

13.86 ± 1.50b

22.45 ± 1.62a

3800

SAP (mg/kg)

5.99 ± 0.43b

8.21 ± 0.63a

9.43 ± 0.74a

11.56 ± 1.01a

–

Water-soluble P (mg/kg)

–

–

–

–

4200

  1. Note: Within the same line, different lowercase letters indicate a significant difference in the same edaphic variable between unfertilized and fertilized tea plantations of CSA and CSS (P < 0.05, t-test);
  2. CSA, Camellia sinensis var. assamica; CSS, Camellia sinensis var. sinensis; SOC, soil organic carbon; SMC, soil moisture content; NO3−-N, nitrate nitrogen; NH4+-N, ammonium nitrogen; SAP, soil available phosphorus.
  3. “–” indicates the absence of the data.
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