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Chemical and Biological Technologies in Agriculture

Table 3 Ammonium and nitrate content in soils at different sampling times

From: Synergistic effect of organic and inorganic fertilization on the soil inoculum density of the soilborne pathogens Verticillium dahliae and Phytophthora spp. under open-field conditions

 

CON

CMW

BRX

OPR

SMC

NH4+ (mg kg−1)

 T0

5.0 ± 0.6

4.8 ± 0.2

4.7 ± 0.5

5.1 ± 0.3

5.5 ± 0.7

 T3

6.6 ± 0.6

7.9 ± 1.6

10.0 ± 4.3

7.7 ± 0.2

7.2 ± 0.3

 T4

5.3 ± 0.3

5.4 ± 0.0

5.8 ± 0.0

5.8 ± 0.3

5.8 ± 0.6

 T7

7.7 ± 0.4

7.0 ± 1.3

7.0 ± 0.3

7.1 ± 0.2

7.3 ± 1.4

NO3− (mg kg−1)

 T0

33.2 ± 1.6

31.1 ± 0.9

30.7 ± 1.3

35.7 ± 0.6

34.6 ± 1.1

 T3

37.5 ± 1.4 de

43.2 ± 6.0 cd

83.1 ± 9.2 a

32.1 ± 1.9 ef

43.1 ± 5.7 cd

 T4

39.4 ± 4.2 d

39.6 ± 2.8 d

45.5 ± 1.7 c

34.8 ± 0.3 e

52.0 ± 5.6 bc

 T7

40.7 ± 2.6 d

51.0 ± 8.5 bc

77.3 ± 3.6 a

45.0 ± 3.0 c

63.3 ± 12.3 b

  1. T0, T3, T4, T7: sampling times (see Table 1 for details)
  2. BRX cow, horse and poultry manures-based compost, OPR olive pomace residues, SMC spent mushroom compost, CMW compost obtained from the organic fraction of the municipal solid wastes
  3. The values in each column followed by a different letter are significantly different according to Tukey’s HSD test (p < 0.05)
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