期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 589, 期 -, 页码 36-45出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2017.02.223
关键词
Auxin-like molecules; Digestate; DOM; Biostimulant-effect; Anaerobic digestion
资金
- GRUPPO RICICIA lab-DiSAA, University of Milan [14-08-02]
Biostimulants improve plant growth by stimulating nutrient uptake and efficiency, improving tolerance to abiotic stress and raising crop quality. Biostimulants are currently only recognised in five categories. However, the recent interest in this sector has led to the identification of some new ones. The aim of this work was to study the auxin like activity of digestate dissolved organic matter (DOM) obtained from full scale anaerobic digester plants. All DOMs had biostimulant capacity comparable with humic acid and amino acids. The auxin-like activities depended mainly on the hydrophobic DOM fractions for the presence of auxin-active and other auxin-like molecules. Significant correlations were found for the auxin-effect in relation to auxin-active molecules and fatty acids responsible for most of the auxin-like effects (67% of the total importance in giving auxin-like activity) while a minor or null contribution was attributable to the carboxylic acids and aminoacid categories. Therefore, the anaerobic digestion process seems to be a useful biotechnology to produce biostimulants. Basing on these first results, the expanding anaerobic digestion sector could become important for the production of new biostimulant classes to meet the agricultural sector's new requirements and saving on raw materials. (C) 2017 Elsevier B.V. All rights reserved.
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