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Chemical and Biological Technologies in Agriculture

Table 1 Relative distribution (%) of main C groups over chemical shift regions (ppm) in 13C-CPMAS-NMR spectrum of HS from artichoke compost and structural indexesa calculated from spectral areas

From: Humic substances from green compost increase bioactivity and antibacterial properties of essential oils in Basil leaves

 

Carbonyl (190–160)

O-Aryl-C (160–145)

Aromatic-C (145–110)

O-Alkyl-C (110–60)

CH3O/CN (60–45)

Alkyl-C (45–0)

A/OA

ARM

HB/HI

LigR

HS Artichoke

10.6

5.6

28.9

24.7

13.8

16.3

0.65

0.40

0.90

2.50

  1. a A/OA = alkyl/O-alkyl ratio (0–45)/(60–110); ARM = aromaticity index [(110–160)/Σ(0–190)]; HB/HI = hydrophobicity index = [Σ(0–45) + (110–160)/ Σ(45–60) + (60–110) + (160–190)]; LigR = Lignin ratio (45–60)/(145–160)
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