Transformation of the organic matter in an agrogray soil and an agrochernozem in the course of the humification of corn biomassстатья
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Дата последнего поиска статьи во внешних источниках: 12 ноября 2013 г.
Авторы:
Larionova A.A. ,
Zolotareva B.N. ,
Kolyagin Y.G. ,
Kudeyarov V.N.
Журнал:
Eurasian Soil Science
Том:
46
Номер:
8
Год издания:
2013
Издательство:
Maik Nauka/Interperiodica Publishing
Местоположение издательства:
Russian Federation
Первая страница:
854
Последняя страница:
861
DOI:
10.1134/S1064229313060045
Аннотация:
The transformation of the organic matter in the course of corn residues humification in an agrogray soil and an agrochernozem was studied in long-term experiments using the method of solid-phase 13C-nuclear magnetic resonance spectroscopy. The humification of the plant residues was found to be accompanied by a decrease in the content of the O-alkyl fragments comprising polysaccharides and polypeptides, an increase in the unsubstituted alkyds content, and by the relative accumulation of aromatic fragments and carboxyl groups. The most strongly transformed pool of the organic matter, as compared to the initial plant residues, was the humic acids with their maximal content of aromatic and carboxyl functional groups and the minimal content of O-alkyls. The chemically stable aromatic fragments were concentrated not only in the pool of humic acids; their content was 64-89% of the pool of the aromatic fragments identified in the soil organic matter. Therefore, to assess the stable pool, the distribution of the functional groups is necessary to be analyzed not only in the humic acids but also in the whole soil organic matter. © 2013 Pleiades Publishing, Ltd.
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Колягин Юрий Геннадьевич