Auteurs, date et publication :
Auteurs M Toïgo , T Pérot , B Courbaud , P Vallet
Publication : Rendez-vous Techniques ONF
Date : 2025
Pages : 9
Catégorie(s)
#FORET OPTMix #INRAERésumé
Volatile Organic Compounds (VOCs) are reactive compounds essential to atmospheric chemistry. They are mainly emitted by living organisms, and mostly by plants. Soil microbes also contribute to emissions of VOCs. However, these emissions have not yet been characterised in terms of quality and quantity. Furthermore, longterm organic matter amendments are known to affect the microbial content of soils, and hence the quantity and quality of VOC emissions. This study investigates which and how much of these VOCs are emitted from soil amended with organic waste products (OWPs). Four OWPs were investigated: municipal solid waste compost (MSW), green waste and sludge co-compost (GWS), bio-waste compost (BIOW) and farmyard manure (FYM). These OWPs have been amended every two years since 1998 until now at a rate of ~4 tC ha−1. A soil receiving no organic inputs was used as a reference (CN). VOCs emissions were measured under laboratory conditions using a Proton Transfer Reaction-Quadrupole ion guide Time of Flight-Mass Spectrometry (PTR-QiToF-MS). A laboratory system was set up made of two Pyrex chambers, one for samples and the second empty, to be used as a blank. Our results showed that total VOC emissions were higher in BIOW than in MSW. Further findings outlined that the most emitted compounds were acetone, butanone and acetaldehyde in all treatments, suggesting a common production mechanism for these compounds, meaning they were not affected by the OWP amendment. We isolated 21 VOCs that had statistically different emissions between the treatments and could therefore be considered as good markers of soil biological functioning. Our results suggest that organic matter and pH jointly influenced total VOC emissions. In conclusion, OWPs in soil affect the type of VOC emissions and the total flux also depends on the pH of the soil and the quantity of organic matter.
Auteurs, date et publication :
Auteurs Letizia Abis , Benjamin Loubet , Raluca Ciuraru , Florence Lafouge , Samuel Dequiedt , Sabine Houot , Pierre Alain Maron , Sophie Bourgeteau-Sadet
Publication : Science of The Total Environment
Date : 2025
Volume : 636
Pages : 1333-343
Catégorie(s)
#ANR-Citation #INRAE #PRO #PRO QualiAgroRésumé
Methane (CH4) oxidation by methanotrophic bacteria in forest soils is the largest biological sink for this greenhouse gas on earth. However, the compaction of forest soils by logging traffic has previously been shown to reduce the potential rate of CH4 uptake. This change could be due to not only a decrease of methanotrophs but also an increase in methanogen activity. In this study, we investigated whether the decrease in CH4 uptake by forest soils, subjected to compaction by heavy machinery 7 years earlier, can be explained by quantitative and qualitative changes in methanogenic and methanotrophic communities. We measured the functional gene abundance and polymorphism of CH4 microbial oxidizers (pmoA) and producers (mcrA) at different depths and during different seasons. Our results revealed that the soil compaction effect on the abundance of both genes depended on season and soil depth, contrary to the effect on gene polymorphism. Bacterial pmoA abundance was significantly lower in the compacted soil than in the controls across all seasons, except in winter in the 0–10 cm depth interval and in summer in the 10–20 cm depth interval. In contrast, archaeal mcrA abundance was higher in compacted than control soil in winter and autumn in the two soil depths investigated. This study shows the usefulness of using pmoA and mcrA genes simultaneously in order to better understand the spatial and temporal variations of soil C H4 fluxes and the potential effect of physical disturbances.
Auteurs, date et publication :
Auteurs Frédérique Changey , Ghozlane Aissaoui , Caroline Plain , Jacques Ranger , Arnaud Legout , Bernd Zeller , Daniel Epron , Thomas Z. Lerch
Publication : Microbial Ecology
Date : 2022
Catégorie(s)
#FORET Azerailles-Clermont #INRAEAuteurs, date et publication :
Auteurs Xu Zhong , Stéphan Jacquet
Publication : Applied and Environmental Microbiology
Date : 2013
Volume : 79
Issue : 23
Pages : 7169-7178
Catégorie(s)
#INRAE #OLARésumé
We tested if a single soil P capacity test allows for a reliable forecast of P leaching from agricultural soils with a high P load. In regions with intensively managed arable soils, the soil P content has been dramatically increased by overfertilization with significant P leaching losses as a result. As a consequence, in order to control the P losses, P fertilization has been legally restricted. In several EU28 countries, the ammonium lactate extraction method (P-AL) is used as a soil test for P fertilizer advice, but sometimes also to determine the allowed P fertilizer dose to reduce leaching losses. We hypothesize that P-AL as an estimator of soil P capacity should be combined with 0.01 M CaCl2 extractable P (P-CaCl2) and/or hot water extractable P (HWP), both estimators of the soil P intensity, to predict P leaching losses in soils with a high P load.
Auteurs, date et publication :
Auteurs T. Vanden Nest , B. Vandecasteele , G. Ruysschaert , R. Merckx
Publication : Agriculture, Ecosystems & Environment
Date : 2025
Volume : 237
Pages : 55-65
Catégorie(s)
#INRAE #PRO #PRO QualiAgroAuteurs, date et publication :
Auteurs Walid Horrigue , Samuel Dequiedt , Nicolas Chemidlin Prévost-Bouré , Claudy Jolivet , Nicolas P.A. Saby , Dominique Arrouays , Antonio Bispo , Pierre-Alain Maron , Lionel Ranjard
Publication : Ecological Indicators
Date : 2025
Volume : 64
Pages : 203-211
Catégorie(s)
#ANR-Citation #Genosol #INRAEAuteurs, date et publication :
Auteurs M. Y. Janjua , D. Gerdeaux
Publication : Knowledge and Management of Aquatic Ecosystems
Date : 2025
Issue : 392
Pages : 02
Catégorie(s)
#INRAE #OLARésumé
& Key message In a mixed poplar/black locust plantation in central France, adverse conditions have led to a prevalence of
interspecific competition, resulting in a poorer performance than monocultures.
& Context In mixed tree plantations, the presence of woody N2-fixing species is thought to reduce N needs by fertilization.
However, benefits associated to soil nitrogen enrichment have to outweigh the negative effects of interspecific competition. To do
so, co-occurring tree species have to be chosen carefully to promote niche sharing between species and reduce competition. Black
locust and poplar mixtures therefore seem promising since both species are fast growing and have potentially complementary
crown shapes.
& Aims Our objective was to evaluate the impact of the poplar/black locust mixture on the growth, above- and belowground
biomass production, and nitrogen allocation of the two species, as compared to their respective monocultures.
& Methods An experimental plantation mixing poplar and black locust was set up in central France. For five growing seasons,
growth, nitrogen allocation, and carbon allocation were monitored for the two species growing either in mixture or in
monoculture.
& Results After a couple of promising growing seasons, black locust growth and survival slowly declined, mainly in the mixture.
At the stand level, biomass production in the mixed plots was nearly 50%below the most productive monoculture (poplar) by age
5 years.
& Conclusion Under adverse conditions, interspecific competition in the mixture was the preponderant interaction, resulting in
higher mortality and lower biomass production than the two monocultures.
Auteurs, date et publication :
Auteurs N. Marron , P. Priault , C. Gana , D. Gérant , D. Epron
Publication : Annals of Forest Science
Date : 2025
Volume : In press
Catégorie(s)
#FORET AgroTCR #INRAERésumé
Increasing attention has been placed on the agroecological impact of applying exogenous organic matter (EOM) amendments, such as green waste compost (GWC) and livestock manure, to agricultural landscapes. However, monitoring the frequency and locality of this practice poses a major challenge, as these events are typically unreported. The purpose of this study is to evaluate the utility of Sentinel-2 imagery for the detection of EOM amendments. Specifically, we investigated the spectral shift resulting from GWC and manure application at two spatial scales, satellite and proximal. At the satellite scale, multispectral Sentinel-2 image pairs were analyzed before and after EOM application to six cultivated fields in the Versailles Plain, France. At the proximal scale, multi-temporal spectral field measurements were taken of experimental plots consisting of 14 total treatments: EOM variety, amendment quantity (15, 30 and 60 t.ha−1) and tillage. The Sentinel-2 images showed significant spectral differences before and after EOM application. Exogenous Organic Matter Indices (EOMI) were developed and analyzed for separative performance. The best performing index was EOMI2, using the B4 and B12 Sentinel-2 spectral bands. At the proximal scale, simulated Sentinel-2 reflectance spectra, which were created using field measurements, successfully monitored all EOM treatments for three days, except for the buried green waste compost at a rate of 15 t.ha−1.
Auteurs, date et publication :
Auteurs Maxence Dodin , Hunter D. Smith , Florent Levavasseur , Dalila Hadjar , Sabine Houot , Emmanuelle Vaudour
Publication : Remote Sensing
Date : 2021
Volume : 13
Issue : 9
Pages : 1616
Catégorie(s)
#INRAE #PRO #PRO QualiAgroAuteurs, date et publication :
Auteurs E. Vaudour , L. Bel , J.M. Gilliot , Y. Coquet , D. Hadjar , P. Cambier , J. Michelin , S. Houot
Publication : Soil Science Society of America Journal
Date : 2025
Volume : 77
Pages : 2122–2139