Table 6 Soil fertility parameters under the different treatments after a 4-year experiment.

From: Effects of the continuous use of organic manure and chemical fertilizer on soil inorganic phosphorus fractions in calcareous soil

Treatment

OM g·kg−1

pH

BD g·cm−3

TN mg·kg−1

TP mg·kg−1

AN mg·kg−1

AP mg·kg−1

AK mg·kg−1

OM

28.420 ± 4.62aA

7.12 ± 1.71aA

1.03 ± 0.07bB

1836.77 ± 112.43aA

1488.04 ± 87.25aA

78.48 ± 15.26bB

86.04 ± 29.41aA

247.70 ± 28.48aA

CF

20.358 ± 6.34bB

6.75 ± 2.48bA

1.41 ± 0.12aA

1825.26 ± 89.34aA

1392.56 ± 104.38bB

110.60 ± 24.18aA

72.40 ± 25.30bB

213.27 ± 32.17bB

CK

21.375 ± 2.17bB

7.03 ± 1.53aA

1.32 ± 0.10aA

1812.63 ± 65.27aA

1317.70 ± 54.27cC

23.42 ± 3.46cC

19.53 ± 5.43cC

66.58 ± 17.55cC

  1. Note: OM = organic matter; BD = bulk density; TN = total nitrogen; TP = total phosphorus; AN = alkali-hydrolysable nitrogen; AP = available phosphorus; and AK = available potassium. The different lowercase and uppercase letters in the same column indicate a significant difference at the 0.05 and 0.01 levels, respectively.
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