Phenolic acids in pig slurry subjected to various treatment processes

Garraway, J. L.; Ramirez, Maureen E. A.

doi:10.1002/jsfa.2740330803

Cited by 7 publications

References 13 publications

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Plant growth inhibitory activity of extracts of raw and treated pig slurry

Ramirez

Garraway

1982

J Sci Food Agric

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Strong acid extracts from raw and treated pig slurries were highly inhibitory to the germination and root growth of barley and wheat. While the activity of the extracts reflected the level of phenolic acids therein, the possibility of other substances contributing to this activity cannot be excluded. Tests with pure compounds showed that certain individual phenolic acids identified in pig slurries inhibited germination and root growth but at higher concentrations than previously reported. Of the treatment systems studied, aeration of pig slurry was the most effective in removing the inhibitory activity associated with extracts.

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Plant growth inhibitory activity of extracts of raw and treated pig slurry

Ramirez

Garraway

1982

J Sci Food Agric

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Phenolic Acids in Soils and their Influence on Plant Growth and Soil Microbial Processes

Hartley

Whitehead

1985

Soil Organic Matter and Biological Activity

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Selective inhibitors of germination of legume seeds in activated sludge compost

et al. 1996

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Water extracts of the compost produced from activated sludge and coffee residue were found to be selectively inhibitory to seed germination of some legumes. Germination rate of white clover (Trifolium repens L.), red clover (Trifolium pratense L.) and alfalfa (Medicago sativa L.) seeds were reduced to 2, 29 and 73% of the control, respectively, by water extracts of the compost (20 g 1-l). However, the extracts did not show any inhibition to seed germination of sorghum (Sorghum bicolor Moench), African millet (Eleusine coracana Gaertn.), and Komatsuna (Brassica rapa L.) at the same concentration. The inhibitors in the compost extracts were separated by ion-exchange chromatography and reverse-phase high performance liquid chromatography (HPLC) and the inhibitory activities of seed germination were tested with white clover seeds. Five inhib$ors were isolated and identified as 3,4-dichlorophenylacetic acid (3,4-DCP), 3$dichlorobenzoic acid (3,4-DCB), 3,4,5trichlorophenylacetic acid, 3,4,5-trichlorobenzoic acid and mono-2-ethylhexyl phthalate by 'H-, 13C-NMR spectroscopy and mass spectrometry. The inhibitory activities of some authentic chemicals of the inhibitors and the related compounds were compared. The results indicated that the main inhibitor in the compost could be 3,4-DCB, which was contained at the concentration of 6.58 mg kg-' compost and showed the strongest inhibitory effect on seed germination of white clover among the tested compounds.

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Phenolic acids in pig slurry subjected to various treatment processes

Cited by 7 publications

References 13 publications

Plant growth inhibitory activity of extracts of raw and treated pig slurry

Plant growth inhibitory activity of extracts of raw and treated pig slurry

Phenolic Acids in Soils and their Influence on Plant Growth and Soil Microbial Processes

Selective inhibitors of germination of legume seeds in activated sludge compost

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