Effect of combined application of inorganic nitrogen and phosphorus to an organic-matter poor soil on soil organic matter cycling
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F24%3A100076" target="_blank" >RIV/60460709:41210/24:100076 - isvavai.cz</a>
Result on the web
<a href="https://peerj.com/articles/17525/" target="_blank" >https://peerj.com/articles/17525/</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.7717/peerj.17984" target="_blank" >10.7717/peerj.17984</a>
Alternative languages
Result language
angličtina
Original language name
Effect of combined application of inorganic nitrogen and phosphorus to an organic-matter poor soil on soil organic matter cycling
Original language description
Sequestering carbon dioxide (CO2) in agricultural soils promises climate change mitigation as well as sustainable ecosystem services. In order to stabilize crop residues as soil carbon (C), addition of mineral nutrients in excess to crop needs is suggested as an inevitable practice. However, the effect of two macronutrients i.e., nitrogen (N) & phosphorus (P), on C cycling has been found contradictory. Mineral N usually decreases whereas mineral P increases the soil organic C (SOC) mineralization and microbial biomass. How the addition of these macronutrients in inorganic form to an organic-matter poor soil affect C cycling remains to be investigated. To reconcile this contradiction, we tested the effect of mineralN (120 kg N ha-1) and/or P (60 kg N ha-1 ) in presence or absence of maize litter (1 g C kg-1 soil) on C cycling in an organic-matter poor soil (0.87% SOC) in a laboratory incubation. Soil respiration was measured periodically during the incubation whereas various soil variables were measured at the end of the incubation. Contrary to literature, P addition stimulated soil C mineralization very briefly at start of incubation period and released similar total cumulative CO2-C as in control soil. We attributed this to low organic C content of the soil as P addition could desorb very low amounts of labile C for microbial use. Adding N with litter built up the largest microbial biomass (144% higher) without inducing any further increase in CO2-C release compared to litter only addition. However, adding P with litter did not induce any increase in microbial biomass. Co-application of inorganic N and P significantly increased C mineralization in presence (19% with respect to only litter amended) as well as absence (41% with respect to control soil) of litter. Overall, our study indicates that the combined application of inorganic N and P stabilizes added organic matter while depletes the already unamended soil.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
40101 - Agriculture
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
PeerJ
ISSN
2167-8359
e-ISSN
2167-8359
Volume of the periodical
12
Issue of the periodical within the volume
SEP 5 2024
Country of publishing house
GB - UNITED KINGDOM
Number of pages
21
Pages from-to
1-21
UT code for WoS article
001308333300002
EID of the result in the Scopus database
2-s2.0-85203427737