Low-weight carboxylic acids as potential risk factor of compost phytotoxicity
Abstract
Being intermediates of organic matter degradation, low-weight carboxylic acids (LWCA) can occur at phytotoxic concentrations on bioactive soils or in the processed organic material applied to soil. While toxicity potentials and mixture effects of LWCA are still poorly known, the potential phytotoxicity of the biomaterials is difficult to assess. In the study effective concentrations (EC) of formic, acetic and propionic acids at non adjusted pH were obtained in short-term germination assays (48 h for cress, Lepidium sativum, and 120 h for ryegrass Lolium multiflorum) and subchronic growth assays (21d). Based on the EC values, LWCA inhibited more strongly plant growth than seed germination. In mixtures each acid acted separately without interaction other than additivity. Toxicity of LWCA increased with increase in carbon chain length, being true also in mixtures. Nontoxic concentration (EC10) for equimolar mixture of formic, acetic and propionic acid was calculated to be below 1000 mg/kg dm.
Main Authors
Format
Conferences
Conference paper
Published
2009
Series
Subjects
ISBN
978-952-10-5576-8
Publication in research information system
Publisher
Markprint Oy
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-201607283699Use this for linking
Parent publication ISBN
978-952-10-5576-8
Review status
Peer reviewed
Language
English
Published in
Finnish Society of Environmental Sciences
Is part of publication
Proceedings of 09 Finnish Conference of Environmental Science, 14-15 May, 2009, Lahti, Finland
Citation
- Himanen, M., Prochazchka, P., & Hänninen, K. (2009). Low-weight carboxylic acids as potential risk factor of compost phytotoxicity. In K. Vakkilainen, & V. Pulkkila (Eds.), Proceedings of 09 Finnish Conference of Environmental Science, 14-15 May, 2009, Lahti, Finland (pp. 100). Markprint Oy. Finnish Society of Environmental Sciences.
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