Stabilization of soil organic matter by earthworms is connected with physical protection rather than with chemical changes of organic matter
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F17%3A43895741" target="_blank" >RIV/60076658:12310/17:43895741 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/60077344:_____/17:00474994 RIV/00216208:11310/17:10359864
Výsledek na webu
<a href="https://ac.els-cdn.com/S0016706116308163/1-s2.0-S0016706116308163-main.pdf?_tid=c3fd1326-f918-11e7-a3f5-00000aab0f6c&acdnat=1515927222_2eb57f3c216cf8928c58756821fc03e7" target="_blank" >https://ac.els-cdn.com/S0016706116308163/1-s2.0-S0016706116308163-main.pdf?_tid=c3fd1326-f918-11e7-a3f5-00000aab0f6c&acdnat=1515927222_2eb57f3c216cf8928c58756821fc03e7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.geoderma.2016.11.017" target="_blank" >10.1016/j.geoderma.2016.11.017</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Stabilization of soil organic matter by earthworms is connected with physical protection rather than with chemical changes of organic matter
Popis výsledku v původním jazyce
Earthworms are important drivers for the formation of soil structure and play a key role in soil organic matter (SOM) dynamics. Our previous long-term (126 weeks) laboratory experiment showed that carbon (C) loss declined through time in soil when litter was mixed and consumed by earthworms (Lumbricus rubellus). Eventually, the C loss was lower than in treatments where litter was mechanically mixed into soil with exclusion of earthworms. However, it is not clear if the solely physical manipulation of soil or biological activity of earthworms lead to different SOM quality, which would result in a distinction in C loss and consequently C sequestration. Thus, we differentiated between physical (mechanical mixing) and earthworm effects on SOM composition. Two types of soil were used in the experiment: clay and sand, and these were incubated with alder (Alnus glutinosa) and willow (Salix caprea) litter, respectively. The combination of soils and litter types corresponds to the natural combinations at the sampling sites. To explain underlying mechanisms of a lower C loss in the earthworm vs. mechanically mixed treatment, we separated SOM fractions in order to gain pools defined in the Rothamsted model. Chemical differences between initial litter and the active and slow pool of SOM obtained by fractionation were studied. No significant differences between the earthworm and mechanically mixed treatment were found in C, nitrogen (N), and phenol contents, composition of major chemical groups of litter studied by solid-state C-13 NMR spectroscopy, and composition of aromatic components of SOM studied by analytical pyrolysis (Py GC/MS). This lack of differences in chemical composition suggests that greater SOM sequestration in the earthworm treatment is likely to be connected with physical protection of SOM inside cast aggregates rather than with chemical changes in SOM mediated by earthworms.
Název v anglickém jazyce
Stabilization of soil organic matter by earthworms is connected with physical protection rather than with chemical changes of organic matter
Popis výsledku anglicky
Earthworms are important drivers for the formation of soil structure and play a key role in soil organic matter (SOM) dynamics. Our previous long-term (126 weeks) laboratory experiment showed that carbon (C) loss declined through time in soil when litter was mixed and consumed by earthworms (Lumbricus rubellus). Eventually, the C loss was lower than in treatments where litter was mechanically mixed into soil with exclusion of earthworms. However, it is not clear if the solely physical manipulation of soil or biological activity of earthworms lead to different SOM quality, which would result in a distinction in C loss and consequently C sequestration. Thus, we differentiated between physical (mechanical mixing) and earthworm effects on SOM composition. Two types of soil were used in the experiment: clay and sand, and these were incubated with alder (Alnus glutinosa) and willow (Salix caprea) litter, respectively. The combination of soils and litter types corresponds to the natural combinations at the sampling sites. To explain underlying mechanisms of a lower C loss in the earthworm vs. mechanically mixed treatment, we separated SOM fractions in order to gain pools defined in the Rothamsted model. Chemical differences between initial litter and the active and slow pool of SOM obtained by fractionation were studied. No significant differences between the earthworm and mechanically mixed treatment were found in C, nitrogen (N), and phenol contents, composition of major chemical groups of litter studied by solid-state C-13 NMR spectroscopy, and composition of aromatic components of SOM studied by analytical pyrolysis (Py GC/MS). This lack of differences in chemical composition suggests that greater SOM sequestration in the earthworm treatment is likely to be connected with physical protection of SOM inside cast aggregates rather than with chemical changes in SOM mediated by earthworms.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
40104 - Soil science
Návaznosti výsledku
Projekt
<a href="/cs/project/GAP504%2F12%2F1288" target="_blank" >GAP504/12/1288: Úloha funkčních vlastností listů rostlin při akumaulaci půdní organické hmoty během primární sukcese</a><br>
Návaznosti
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2017
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Geoderma
ISSN
0016-7061
e-ISSN
—
Svazek periodika
289
Číslo periodika v rámci svazku
MAR 1 2017
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
7
Strana od-do
29-35
Kód UT WoS článku
000392771300004
EID výsledku v databázi Scopus
—