Searching for sensitive indicators of fertilization-induced SOM changes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027006%3A_____%2F17%3A00004337" target="_blank" >RIV/00027006:_____/17:00004337 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Searching for sensitive indicators of fertilization-induced SOM changes
Original language description
Topsoil samples were taken between 2004 and 2014 from long-term field trials (LTEs) along a climate sequence in the Czech Republic. Evaluated treatments included: unfertilized from the commencement of the experiments (Nil), mineral fertilized (NPK), farmyard manured (FYM), and combined (FYM+NPK). SOM analyses performed: TOC, hot water exctractable C (Clab), detection of FTIR spectra peaks at 3000-2800 cm-1 (FTIRaliph) and 1660-1580 cm-1 (FTIR arom). C pool index (CPI), lability index (LI) and C management index (CMI) based on TOC and Clab were calculated. SOM decomposition index (DI) was calculated as a ratio between FTIRarom and FTIRaliph. Regardless of site conditions, NPK and especially FYM fertilization increased the TOC, Clab, CPI, LI, CMI and FTIRaliph in all experimental plots compared to Nils (Fig. 1), while the highest FTIRarom and DI were determined in Nils. DI was the most sensitive to SOM changes with 36% change (NPK+FYM compared to Nil), followed by FTIRaliph, CMI and Clab (25%). While parameters based on chemical and spectroscopic detection revealed approximately the same extent of SOM differences between treatments, the former varied less over time. The results showed that none of the studied parameters can be used as a stand-alone SOM quality descriptor. The shortcomings of FTIR parameters higher variability can be overcome by increasing the number of measurements taken.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
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OECD FORD branch
40104 - Soil science
Result continuities
Project
<a href="/en/project/QJ1610547" target="_blank" >QJ1610547: Agrotechnical treatments for arable crops in dry areas</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů