期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 590, 期 -, 页码 40-49出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2017.03.026
关键词
Composting; Natural organic matter; Biostimulants; (13)CPMAS NMR; H-1 NMR; Thermochemolysis-GC/MS
资金
- European Community's Seventh Framework Programme (FP7) [312117]
Four water extractable organic matter (WEOM) were obtained from composts made out of residues of: 1. artichoke (C-CYN), 2. artichoke/fennel (C-CYNF), 3. tomato/woodchips (C-TOM), 4. Municipal solid waste (C-MSW), and their bioactivity was tested for maize seed germination and maize seedling growth. The molecular properties of both original composts and their WEOM were characterized by spectroscopic (C-13-CPMAS- and H-1 NMR, FTIR-ATR), thermochemolysis-GC/MS, and thermal methods (TGA, DSC). While all WEOM had significant effects on plant growth, CYN-WEOM was the only material that concomitantly increased germination rate and primary and lateral root length of maize seedlings. The lignin-rich WEOM from green composts were generally more effective than those obtained from equally hydrophobic, but mainly alkyl-rich municipal organic wastes. A flexible conformational structure, due to the balanced content of aromatic compounds and carbohydrates, appeared to facilitate the release of bioactive molecules from WEOM suprastructures and stimulate plant growth. (C) 2017 Elsevier B.V. All rights reserved.
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