Table 1 Chemical properties of soil and wheat straw at early and late stages of decomposition at different temperatures.

From: Effects of changes in straw chemical properties and alkaline soils on bacterial communities engaged in straw decomposition at different temperatures

Parameter

L30

M30

H30

L120

M120

H120

pH

7.42 ± 0.02a

7.38 ± 0.01ab

7.27 ± 0.01bc

7.47 ± 0.02a

7.36 ± 0.05ab

7.24 ± 0.01c

C/N ratio

20.03 ± 0.53a

19.44 ± 0.45a

19.43 ± 0.58a

18.12 ± 0.12a

18.11 ± 0.60a

17.41 ± 0.87a

DOC (mg kg–1)

125.44 ± 1.92a

126.19 ± 9.40a

130.40 ± 4.04a

118.85 ± 2.76a

117.62 ± 2.87a

134.73 ± 4.71a

DON (mg kg–1)

81.57 ± 3.09d

99.95 ± 2.83d

148.96 ± 1.74c

70.05 ± 4.86d

185.12 ± 6.58b

234.85 ± 12.77a

MBC (mg kg–1)

295.15 ± 10.01b

292.53 ± 2.46b

174.51 ± 15.91c

362.98 ± 9.34a

338.69 ± 17.35ab

169.14 ± 9.29c

MBN (mg kg–1)

21.08 ± 4.11c

35.52 ± 2.70abc

46.19 ± 3.09ab

34.36 ± 5.54bc

52.61 ± 4.31a

39.55 ± 1.19ab

Straw C (g kg–1)

414.85 ± 12.31bc

434.30 ± 5.19b

418.14 ± 18.31b

490.63 ± 6.39a

342.40 ± 11.91d

361.68 ± 8.56cd

Straw N (g kg–1)

3.93 ± 0.10b

5.06 ± 0.63b

8.14 ± 0.37a

4.45 ± 0.05b

4.85 ± 0.07b

6.76 ± 0.07a

Straw P (g kg–1)

0.53 ± 0.01e

0.58 ± 0.03e

0.90 ± 0.05d

1.11 ± 0.05c

1.45 ± 0.01b

2.02 ± 0.02a

  1. L30: low temperature (15 °C) on day 30 (early stage of decomposition); M30: moderate temperature (25 °C) on day 30; H30: high temperature (35 °C) on day 30; L120: low temperature on day 120 (late stage of decomposition); M120: moderate temperature on day 120; H120: high temperature on day 120.
  2. C/N ratio: soil carbon/nitrogen ratio, DOC: soil dissolved organic carbon, DON: soil dissolved organic nitrogen, MBC: soil microbial biomass carbon, MBN: soil microbial biomass nitrogen.
  3. The values are average values ± standard error (n = 3). Different letters within a row indicate a significant difference (P < 0.05) between treatments according to Tukey’s test.
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