Effect of soil invertebrates on the formation of humic substances under laboratory conditions

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2011
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Frouz, Jan
Li, Xiangzhen
Pizl, Václav
Abakumov, Evgenii V.
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Eurasian Soil Science. Springer. 2011, 44(8), pp. 893-896. ISSN 1064-2293. eISSN 1556-195X. Available under: doi: 10.1134/S1064229311080047
Zusammenfassung

The complete polymerization of phenols and proteins (one of the processes involved in the formation of humic substances) was explained. It was shown that fly (Bibio marci) larvae and earthworms (Aporrectodea caliginosa) participate in the complete polymerization of phenols and proteins. In a laboratory experiment, invertebrates participated in the degradation of organic matter and the synthesis of humic substances, which was proved in experiments with 14C-labeled phenols and proteins. The same organic substances (phenols and proteins) without the impact of invertebrates were used as the control substances. The distributions of the 14C isotope in alkaline extracts separated by solubility in acids (humic and fulvic acids) was compared to those of the control substances. The portion of the 14C isotope in the humic acids in the excrements of Bibio marci was higher than that in the control substances. The content of 14C-labeled humic substances in the excrements of the earthworm Aporrectodea caliginosa exceeded the control values only in the experiment with proteins. When clay material was added to the organic substances, the portion of the 14C isotope in the humic acids increased in both experiments with phenols and proteins. When these substrates passed through the digestive tracts of the invertebrates, the polymerization of organic substances and the inclusion of proteins and phenols into humic acids occurred.

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570 Biowissenschaften, Biologie
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ISO 690FROUZ, Jan, Xiangzhen LI, Andreas BRUNE, Václav PIZL, Evgenii V. ABAKUMOV, 2011. Effect of soil invertebrates on the formation of humic substances under laboratory conditions. In: Eurasian Soil Science. Springer. 2011, 44(8), pp. 893-896. ISSN 1064-2293. eISSN 1556-195X. Available under: doi: 10.1134/S1064229311080047
BibTex
@article{Frouz2011-08-18Effec-51392,
  year={2011},
  doi={10.1134/S1064229311080047},
  title={Effect of soil invertebrates on the formation of humic substances under laboratory conditions},
  number={8},
  volume={44},
  issn={1064-2293},
  journal={Eurasian Soil Science},
  pages={893--896},
  author={Frouz, Jan and Li, Xiangzhen and Brune, Andreas and Pizl, Václav and Abakumov, Evgenii V.}
}
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    <dcterms:abstract xml:lang="eng">The complete polymerization of phenols and proteins (one of the processes involved in the formation of humic substances) was explained. It was shown that fly (Bibio marci) larvae and earthworms (Aporrectodea caliginosa) participate in the complete polymerization of phenols and proteins. In a laboratory experiment, invertebrates participated in the degradation of organic matter and the synthesis of humic substances, which was proved in experiments with &lt;sup&gt;14&lt;/sup&gt;C-labeled phenols and proteins. The same organic substances (phenols and proteins) without the impact of invertebrates were used as the control substances. The distributions of the &lt;sup&gt;14&lt;/sup&gt;C isotope in alkaline extracts separated by solubility in acids (humic and fulvic acids) was compared to those of the control substances. The portion of the &lt;sup&gt;14&lt;/sup&gt;C isotope in the humic acids in the excrements of Bibio marci was higher than that in the control substances. The content of &lt;sup&gt;14&lt;/sup&gt;C-labeled humic substances in the excrements of the earthworm Aporrectodea caliginosa exceeded the control values only in the experiment with proteins. When clay material was added to the organic substances, the portion of the &lt;sup&gt;14&lt;/sup&gt;C isotope in the humic acids increased in both experiments with phenols and proteins. When these substrates passed through the digestive tracts of the invertebrates, the polymerization of organic substances and the inclusion of proteins and phenols into humic acids occurred.</dcterms:abstract>
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